Addition of soda (Na₂CO₃) to the vitrifying mixture produces glasses with excellent optical properties.
Give a brief account on silica?Silica is the common name for the compound silicon dioxide, which consists of one silicon atom and two oxygen atoms. It is an important component of many rocks, sands, and clays, and is also found in many plants and animals. Silica is used in a wide variety of products, from beer and wine to pottery, glass, and paint. It is also used in building materials such as concrete and mortar, and as a food additive. Silica is also used to make silicon-based electronics such as computer chips.
Adding lime (CaCO₃) to the vitrifying mixture creates a jar that can be used to bake or store the liquid medicine.
Addition of alumina (Al₂O₃) to a mixture undergoing vitrification produces a glass that is insoluble in water.
Addition of borax (Na₂B₄O₇) to the mixture during vitrification allows glass to be produced at much lower temperatures.
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The fluid-filled interior compartment of the thylakoid network is referred to as the:
A. cytoplasm.
B. intermembrane space.
C. lumen.
D. grana.
E. stroma.
The fluid-filled interior compartment of the thylakoid network is referred to as the: Lumen
The thylakoid lumen is an aqueous phase that is continuously enclosed by the thylakoid membrane. It is essential for photophosphorylation during photosynthetic activity. Protons are hyped across the thylakoids into the lumen during the light-dependent reaction, making it acidic down to pH 4. The lumen in the chloroplast is referred to as the stroma. The stroma is the whitish fluid that surrounds the grana (thylakoids stacks) within the chloroplast. A lumen is the chloroplast membrane that surrounds space. Light energy is captured by photosystems found in thylakoid membranes. The thylakoid membrane contains enzymes required for photosynthesis's light-dependent reactions. Hydrogen ions are pumped into the thylakoid space, or lumen, during these reactions.The thylakoid space has an acidic pH due to the high concentration of hydrogen ions.
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Spreadsheets are super helpful in helping you stay organized when calculating recipe costs because they have different rows and columns to track all your _____ individually and what they cost.
Question 1 options:
ideas
customers
ingredients
reviews
Question 2 (1 point)
Ryan is a baker who likely does what to his ingredients rather measuring them out with cups?
Question 2 options:
splitting up
sharing
weighing out
cultivating
Question 3 (1 point)
What company has a trade secret that claims to use "eleven herbs and spices," supposedly scribbled on a piece of yellow notepaper inside an iron safe in Louisville, Kentucky, and as the story goes, the safe is actually a vault surrounded by cameras, motion-detectors, and even guards!
Question 3 options:
Chik-Fil-A
Coca Cola
McDonald's
Kentucky Fried Chicken
Question 4 (1 point)
What kind of measuring device comes in sets, with each part of the set holding a pre-determined volume and increasing in size from ¼ to 1?
Question 4 options:
strain measuring spoons
conversion measuring spoons
tare measuring cups
standard measuring cups
Question 5 (1 point)
What kind of cups for measuring are sometimes made from glass or something transparent so the markings on the side with different measurements are visible?
Question 5 options:
graduated measuring cups
standard measuring cups
tare measuring cups
Maillard measuring cups
Question 6 (1 point)
Schools, hospitals, prisons, universities, summer camps, and government buildings are just a few examples of the types of institutions and commercial kitchens that depend on what kind of recipes on a daily basis?
Question 6 options:
trade secret recipes
small volume recipes
improvised recipes
standardized recipes
Question 7 (1 point)
As a big-time chef, your job entails nothing more than simply putting out spectacular food.
Question 7 options:
True
False
Question 8 (1 point)
Rice never loses its food value, regardless of how many times its rinsed.
Question 8 options:
True
False
Question 9 (1 point)
When a food cost analysis is properly done, it can serve as a tool to monitor your overall expenses so you can make a profit and stay within the confines of your budget.
Question 9 options:
True
False
Question 10 (1 point)
When looking for consistency and reliability, in cooking and other endeavors, it's far better to rely on what rather than guesswork?
Question 10 options:
intuition
hypotheses
numbers
estimates
Question 11 (1 point)
Most failing restaurants find themselves in trouble because they do not understand the what that is associated with what they are doing?
Question 11 options:
cost
time
resilience
integrity
Question 12 (1 point)
When adhering to the ABCs of eating when planning out your diet, ensuring that you are not too heavy on fat, salt, or sugar means that you are using what?
Question 12 options:
adequacy
moderation
variety
balance
Question 13 (1 point)
Inventory control provides predictable information on the quantity of ingredients needed for each _____ cycle.
Question 13 options:
revenue
standardized
nutrient
production
Question 14 (1 point)
As delightful as it is to design a delicious, exciting, and colorful menu, it is equally as important to see the hidden costs and risk behind every decision.
Question 14 options:
True
False
Question 15 (1 point)
What happens to ingredients through the process of trimming, cleaning, and cooking?
Question 15 options:
They shrink.
They grow.
They disintegrate.
They multiply.
Answer:
A-Ideas
Explanation:
Meiosis is the cell divison that occurs in non reproductive cells
True
False
Into how many peaks would you expect the 1H NMR signals of the indicated protons to be split? (Assume all coupling constants are equal. )
The 1H NMR signals of the indicated protons would be split into three peaks.
What are Protons?
Protons are subatomic particles that are present in the nucleus of an atom. They have a positive electric charge and are one of the three main components of an atom, along with electrons and neutrons. Protons are the heaviest of the three particles and make up a large portion of an atom's mass. The number of protons in an atom is known as its atomic number and is what determines an element's chemical behavior and properties.
The split happens because each proton is coupled to two other protons, and each proton is affected by the other two, resulting in a triplet.
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Increasing the amplitude means you are increasing the ___ of a wave.
A)wavelength
B)wave speed
C)frequency
D)energy
Increasing the amplitude means you are increasing the energy of a wave option -D is correct answer.
Just what is amplitude?The distance between the wave's base and its crest is its amplitude. It represents the furthest the vibrating body has traveled.
As the vibration of the sound particles increases, the amplitude length also grows. The intensity and energy of the sound particle particles increase as a result. The sound is louder as a result of the increased energy.
The energy increases with increasing amplitude. In conclusion, waves carry energy. Their frequency and amplitude are related to the amount of energy they carry. Energy increases with frequency and amplitude, respectively, as they both rise.
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what is the mistake in the set up above?
Answer:
Explanation:
d
Which of the following substances would you expect to have a nonzero dipole moment? Check all that apply.
O Chloroethane, CH3 CH2C1 O XeF4 O Cl20
BF3
O Chloroethane, CH3CH2Cl, O XeF4 of the following substances would expect to have a nonzero dipole moment
A substance with a non-zero dipole moment means that the electrons are not distributed symmetrically in the molecule, resulting in a partial positive charge on one end and a partial negative charge on the other end. Chloroethane, CH3CH2Cl has a polar covalent bond between C-Cl and since the C-Cl bond is polar the overall molecule is polar and thus has a nonzero dipole moment.O Chloroethane, CH3 CH2C1 O XeF4 O Cl20. BF3XeF4 has a tetrahedral electron pair geometry, with 4 polar covalent bond Xe-F, and since all the F atoms are in the same plane as the Xe atom, the molecule is polar and thus has a nonzero dipole moment. Cl20 has a polar covalent bond Cl-Cl but since the molecule is symmetric the overall dipole moment is zero. BF3 has a trigonal planar electron pair geometry, with 3 polar covalent bond B-F, but since the molecule is symmetric the overall dipole moment is zero.
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QUIZ 5: CHAPTER REVIEW The nuclear product of radioactive decay is called the daughter nuclide. True False
The nuclear product of radioactive decay is called the daughter nuclide.
True
What is radioactive?Radioactivity is a phenomenon in which particles such as alpha, beta and gamma rays are emitted from unstable atomic nuclei. This is due to the fact that the nucleus is unstable and requires a rearrangement of its protons and neutrons. Radioactive isotopes can be found in nature, or they can be artificially created. Radioactivity has many useful applications, such as medical imaging, cancer treatments, smoke detectors, and nuclear energy. It also has some potential dangers, such as radiation exposure and the risk of nuclear disasters.
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A container is filled with a gas. The container has a wall controlled by a moveable piston. The
temperature within the container is held constant. The gas in the container has a pressure of 1.85
atmospheres and fills a volume of 4.64 liters. What will be the new volume of the gas if the pressure is
changed to 2.34 atmospheres?
Answer:
The new volume will be 3.67 L.
Explanation:
As the volume increases, the gas particles (atoms or molecules) take longer to reach the walls of the container and therefore collide with them fewer times per unit of time. This means that the pressure will be lower because it represents the frequency of collisions of the gas against the walls. In this way pressure and volume are related, determining Boyle's law which says:
"The volume occupied by a certain gaseous mass at constant temperature is inversely proportional to pressure"
Boyle's law is expressed mathematically as:
P*V=k
Now it is possible to assume that you have a certain volume of gas V1 that is at a pressure P1 at the beginning of the experiment. If you vary the volume of gas to a new value V2, then the pressure will change to P2, and it will be fulfilled:
P1 * V1 = P2 * V2
In this case:
P1= 1.85 atmV1= 4.64 LP2= 2.34 atmV2= ?Replacing:
1.85 atm* 4.64 L= 2.34 atm* V2
Solving:
[tex]V2= \frac{1.85 atm* 4.64 L}{2.34 atm}[/tex]
V2= 3.67 L
The new volume will be 3.67 L.
Benzene is a liquid with molecular formula C6H6
Ethene is a gas with molecular formula C2H4
Which statement is correct?
A 1 mole of benzene and 1 mole of ethene contain the same number of atoms.
B 1 mole of benzene and 1 mole of ethene both have a volume of 24 dm³ at room temperature and pressure.
C Both benzene and ethene have the same empirical formula.
D The number of carbon atoms in 0.5 moles of ethene is equal to the Avogadro constant.
And why is it that way?
Answer:
Benzene is a hydrocarbon with molecular formula of C6 H12 including 3πbond which are rotating
benzene is also a aromatic but ethene is not a aromatic
Explanation:
Answer: No, one mole of benzene (C6H6) and one mole of ethene (C2H4) will have the same number of molecules (6.02x10^23 benzene molecules and 6.02x10^23 molecules of ethene). However, one molecule of benzene consists of 12 atoms, while one molecule of ethene consists of 6 atoms.
What is the mass of 2.5 moles of hydrogen fluoride gas HF
Answer:
You will get 5.0 g of hydrogen.
Explanation:
As with any stoichiometry problem, we start with the balanced equation.
Sn
l
+
2HF
→
SnF
2
+
H
2
Moles of H
2
=
2.5
mol Sn
×
1 mol H
2
1
mol Sn
=
2.5 mol H
2
Mass of H
2
=
2.5
mol H
2
×
2.016 g H
2
1
mol H
2
=
5.0 g H
2
An ideal ga (which i i a hypothetical ga that conform to the law governing ga behavior) confined to a container with a male piton at the top. (Figure 2) A male wire i attached to the piton. When an external preure of 2. 00 atm i applied to the wire, the ga compree from 6. 40 to 3. 20 L. When the external preure i increaed to 2. 50 atm , the ga further compree from 3. 20 to 2. 56 L. In a eparate experiment with the ame initial condition, a preure of 2. 50 atm wa applied to the ideal ga, decreaing it volume from 6. 40 to 2. 56 L in one tep. If the final temperature wa the ame for both procee, what i the difference between q for the two-tep proce and q for the one-tep proce in joule?
An ideal gas is a gas composed of a large number of identical molecules that obey the ideal gas law.
What do you mean by Gas?
Gas is a state of matter made of atoms and molecules that are not bound together, allowing them to move freely and take the shape and volume of their container. It is one of the four fundamental states of matter (the others being solid, liquid, and plasma).
The heat exchanged in a two-step process is given by
q = CpΔT + (P1V1 – P2V2)
where Cp is the specific heat capacity of the gas, ΔT is the change in temperature, P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.
For the two-step process,
q = CpΔT + (2.00 atm x 6.40 L – 2.50 atm x 3.20 L)
For the one-step process,
q = CpΔT + (2.50 atm x 6.40 L – 2.50 atm x 2.56 L)
The difference in q for the two-step process and the one-step process is
q2 – q1 = (2.50 atm x 3.20 L – 2.00 atm x 6.40 L)
q2 – q1 = (7.68 L atm – 12.80 L atm)
q2 – q1 = -5.12 L atm
Since 1 L atm = 101.3 J, the difference in q for the two-step process and the one-step process is
q2 – q1 = -5.12 L atm x 101.3 J/L atm
q2 – q1 = -517.4 J.
Hence, the difference is -517.4 J.
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PLEASE HELP FASTTT! pls put real answer :)
Automotive airbags inflate when sodium azide, NaN3, rapidly decomposes to its component elements via this reaction.
2NaN3 → 2Na + 3N2
***How many grams of sodium azide are required to form 5. 00 g of nitrogen gas?***
The molar mass of sodium azide is 64. 99 g/mol
The molar mass of nitrogen gas is 28. 00 g/mol
Show all steps in the solution of this question, including proper units, for full credit
3.88 grams of sodium azide are required to form 5.00 g of nitrogen gas.
In order to determine how many grams of sodium azide are required to form 5.00 g of nitrogen gas, we can use the balanced equation for the reaction:
2NaN3 (s) → 2Na (s) + 3N2 (g)
We can start by converting the given amount of nitrogen gas to moles:
5.00 g N2 x (1 mol N2 / 28.00 g N2) = 0.1786 mol N2
We know that the reaction produces 3 moles of N2 for every 2 moles of NaN3 that are used, so we can use the following ratio to find the number of moles of NaN3 required:
0.1786 mol N2 / 3 mol N2 = 0.0596 mol NaN3
Finally, we can convert moles of NaN3 back to grams using the molar mass of NaN3:
0.0596 mol NaN3 x (64.99 g NaN3 / 1 mol NaN3) = 3.88 g NaN3
So, 3.88 grams of sodium azide are required to form 5.00 g of nitrogen gas.
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A 0.95 M solution of 10.0 mL Al(OH)3 is neutralized using a 2 M solution of H2SO4. How much H2SO4 was needed
H2SO4 has a molecular weight of 98 g/mole. 98% concentrated sulfuric with a density of 1.84 g/mL is the usual source.
We would need 98 g for a 1 M solution in 1 L, but because this is for 500 mL, just 49 g of H2SO4 will be needed. Common concentrations of sulfuric acid are 78, 93, or 98 percent. Pure anhydrous sulfuric acid does not exist in nature due to its affinity for water. 35% sulfuric acid Fertilizers like ammonium sulfate and super-phosphate of lime are produced using solution. In the production of hydrochloric acid, sulfate salts, synthetic detergents, dyes & pigments, and medications, it is frequently employed.
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PLEASE HELP : A dead alkaline battery is found to contain a compound of manganese and oxygen. Its percentage composition is 70. 0% Mn and 30. 0% O. What is the empirical formula of this substance?
The empirical formula of the compound is MnO2.
The empirical formula of a substance is the simplest whole-number ratio of atoms in a compound. To find the empirical formula of a compound, you first need to determine the number of moles of each element present in the compound.
Given that the percent composition of the compound is 70% Mn and 30% O, we can assume that 100g of the compound contains 70g Mn and 30g O.
To convert mass to moles, we need to know the molar mass of each element. The molar mass of Mn is 54.9380 g/mol, and the molar mass of O is 16.00 g/mol.
So, we have:
70g Mn / 54.9380 g/mol = 1.27 moles Mn30g O / 16.00 g/mol = 1.87 moles OThe simplest whole number ratio of Mn and O that gives 1.27 moles Mn and 1.87 moles O is 1:2.
Therefore, the empirical formula of the compound is MnO2.
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Pyroclastic material is classified primarily by the size of the particles. What is the basis for classifying lava?
please help !
Answer:
Crustal appearance provides the basis for classifying lava flows on land into three major categories, pahoehoe, aa and blocky.
Explanation:
Crustal appearance provides the basis for classifying lava flows on land into three major categories, pahoehoe, aa and blocky.
Is lava a pyroclastic material?Lava creeps slowly and burns everything in its path but pyroclastic flows destroys nearly everything by land and air, its speed is usually greater than 80 km per hour, but it can reach 400 km per hour.
Pyroclastic flows contain a high-density mix of hot lava blocks, pumice, ash and volcanic gas. They move at very high speed down volcanic slopes, typically following valleys.
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Someone please help I will give brainliest!!!!!!!
Answer:
Option 1:
Cu(NO3)2 + Ag
hope this was helpful
The photo shows a plant that needs rich soil and lots of
sunlight to grow.
Which type of ecosystem is most likely to have a large number of these
plants?
O A. Grassland
B. Taiga
C. Deciduous forest
D. Desert
Answer:
A grassland
Explanation:
Based on the information provided, the ecosystem that is most likely to have a large number of plants that need rich soil and lots of sunlight to grow is a grassland, which is in option A.
What are the types of plants?The plant in the photo requires rich soil and lots of sunlight to grow. Therefore, the ecosystem that is most likely to have a large number of these plants is the one that meets these requirements. A grassland is an ecosystem that receives a lot of sunlight and has nutrient-rich soil, which makes it a potential habitat for such plants. A taiga, on the other hand, is characterized by cold temperatures and acidic soil, which may not support the growth of plants that need rich soil and sunlight.
Hence, based on the information provided, the ecosystem that is most likely to have a large number of plants that need rich soil and lots of sunlight to grow is a grassland, which is in option A.
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A student generates a plot of ln(k) vs ln[OH-].
The result yields a straight line with the equation: y = 1.18x + -3.80
According to this data, what is the order of the reaction in OH-, to the nearest whole number?
The order of the reaction is First Order with respect to the hydroxide ion (OH-) can be determined by examining the slope of the line generated in the plot of ln(k) vs ln[OH-]. In this case,
the slope of the line is 1.18, which indicates that the reaction is first-order with respect to OH-. The order of a chemical reaction refers to the power to which the concentration order of a reactant is raised in the rate equation. The rate of a reaction is typically described by the rate equation, which is a mathematical expression that relates the rate of the reaction to the concentrations of the reactants. The order of a reaction is determined experimentally by measuring the rate of the reaction at different concentrations of the reactants and fitting the data to a rate equation.
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Explain what it means for materials to move down their concentration gradient and up their concentration gradient.
Moving down the concentration gradient means that materials move from an area of high concentration of the material to an area of low concentration of the material.
What is concentration?In chemistry, concentration is the amount of a substance in a given space. Another way to describe concentration is the proportion of the solute to a solvent or entire solution. In general, mass/unit volume is used to express concentration. Instead of using volume, concentration can be stated as a mass per unit. Although concentration is typically used to describe chemical solutions, it may be computed for any mixture.
This can be seen in osmosis, where water moves from a higher concentration of solute to a lower concentration of solute.
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The basic unit of electric current is the:
ohm.
ampere.
* conductivity.
volt.
Answer is ampere
Answer:
It's B
Explanation:
Edge2021
PLEASE HELP SOON!
What kind of reaction occurs in an electrolytic cell? What characterizes its voltage?
I know a redox reaction occurs in electrolytic cells, but am confused about the second part, please help!
In an electrolytic cell, an oxidation-reduction reaction occurs. This type of reaction involves the transfer of electrons from one species to another.
The voltage of an electrolytic cell is typically greater than the voltage of a galvanic cell and is determined by the reactants and the reaction conditions.
In an electrolytic cell, a chemical reaction is driven by an external electrical current. This current causes electrons to flow between two electrodes, typically a cathode and an anode. At the cathode, electrons are gained, leading to a reduction reaction, while at the anode, electrons are lost, leading to an oxidation reaction.
The voltage of an electrolytic cell is typically greater than the voltage of a galvanic cell, and is determined by the reactants and the reaction conditions. The voltage must be high enough to provide the energy needed to drive the reaction, and can be adjusted by changing the current. The reaction rate of an electrolytic cell can also be controlled by varying the current.
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Transpiration is when a plant releases water vapor through its stomata, which are pours in its leaves and stems. What other process in the water cycle is this most similar to? explain your reasoning.
In addition to respiration, a process known as guttation involves the loss of liquid water from a plant's healthy leaf or stem, mostly through water stomata.
What is the transpiration process?The physiological loss of water . water of water vapor, mostly from the stomata of leaves, but also by evaporation first from surfaces of leaf tissue, flowers, and stems, is known as transpiration.
Why is transpiration necessary to plants?Additionally, by providing evaporative cooling, vegetation transpiration makes a major contribution to the energy balance of the leaf. Additionally, transpiration speeds up the movement of nutrients and water from roots to the shoots. Transpiration occurs when water vapor leaves a plant through the stomata.
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Which is an example of a fission reaction? Check all that apply.
Superscript 3 subscript 1 upper H plus superscript 3 subscript 1 upper H right arrow superscript 4 subscript 2 upper H e plus 2 superscript 1 subscript 0 n.
Superscript 239 subscript 94 upper P u plus superscript 1 subscript 0 n right arrow superscript 144 subscript 58 upper C e plus superscript 94 subscript 36 upper K r plus 2 superscript 1 subscript 0 n.
Superscript 241 subscript 95 upper A m plus superscript 1 subscript 0 n right arrow superscript 144 subscript 57 upper L a plus superscript 95 subscript 38 upper S r plus 3 superscript 1 subscript 0 n.
Superscript 13 subscript 6 upper C plus superscript 1 subscript 1 upper h right arrow superscript 14 subscript 7 upper N.
Answer:
the answer is b and c.
Explanation:
got it right on edge 2021
An example of a fission reaction is as follows:
²³⁹Pu₉₄ + n¹₀⇒¹⁴⁴Ce₅₈ + ⁹⁴Kr₃₆ + ¹n₀
²⁴¹Am₉₅ + ¹n₀ ⇒ ¹⁴⁴La₅₇ + ⁹⁵Sr₃₈ + ¹n₀
What is a fission reaction?A fission reaction is a type of nuclear reaction in which the nucleus of an atom is split into two or more smaller nuclei, along with the release of a large amount of energy and several neutrons. This process occurs when the nucleus of an atom absorbs a neutron and becomes unstable, causing it to split apart.
Fission reactions can occur naturally, as in the decay of certain radioactive isotopes, or can be induced by bombarding a nucleus with high-energy particles.
Fission is also the process used in nuclear power plants to generate electricity, where the heat produced by the fission reaction is used to produce steam that drives turbines.
Thus, options B and C are correct.
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Question 3
Which of the following is true of solar energy?
1. A technique for generating electricity using solar energy has not been developed.
2. The Sun's rays strike the Earth continuously; therefore storing electricity generated by solar cells is not necessary.
3. Producing electricity using solar cells is expensive.
4. The quantity of solar energy available to produce electricity is not affected by location on Earth's surface.
The quantity of solar energy available to produce electricity is not affected by location on Earth's surface. This statement is true about solar energy.
What is solar energy ?
Solar energy uses the sun's rays to create heat, light, and electricity. It is a renewable energy source. Heat may be employed in industrial activities like manufacturing whereas light can be immediately transformed into energy..
Solar energy may be converted directly into electrical power. A nonmechanical device called a photovoltaic cell is often constructed of silicon alloys. Photons, or solar energy particles, make up sunlight.
Due to the employment of particular grade silicon and silver during production, solar cells have a high cost of production. Solar cells don't have any moving components, so they may be readily installed in distant locations, but once installed, they don't require any care.
Thus, option D is correct.
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Convert 4.97 x 10' grams of ammonia (NH3) to moles of ammonia.
Answer: There are [tex]0.292 \times 10^{-4} mol[/tex] are present in [tex]4.97 \times 10^{-4} g[/tex] of ammonia.
Explanation:
Given: Mass of ammonia = [tex]4.97 \times 10^{-4} g[/tex]
As number of moles is the mass of substance divided by its molar mass.
Hence, moles of ammonia (molar mass = 17 g/mol) are calculated as follows.
[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{4.97 \times 10^{-4} g}{17 g/mol}\\= 0.292 \times 10^{-4} mol[/tex]
Thus, we can conclude that there are [tex]0.292 \times 10^{-4} mol[/tex] are present in [tex]4.97 \times 10^{-4} g[/tex] of ammonia.
11th maths,physics, biology, chemistry, English,
Answer:
???
Explanation:
a balloon initially has a volume of 0.400 L. the temperature is 20.C what will be the volume when he heats the balloon up to 250C
The balloon has a capacity of 0.7 L after being heated to 250°C.
We utilize the Charles' Law equation to determine the system's ultimate volume. According to this rule, the volume of a gas under constant pressure is precisely proportional to its temperature.
Mathematically,
V1/T1 = V2/T2
where,
V1 and T1 are the gas's starting volume and temperature.
V2 and T2 are the gas's ultimate volume and temperature.
We receive:
V1 = 0.4L
T1 = 20.C = (20 + 273)K = 293K
V2=?
T2 = 250.C = (250 + 273)K + 523)K
Using the values in the equation above, we obtain:
0.4/293 = V2/523
V2 = 0.7L.
As a result, the balloon has a capacity of 0.7 L after being heated to 250°C.
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The information below pives PH values of solutions , w,XYZ
Solution
Pl values
2
6.5
W
Y
z
14
4.5
(a) Which solution is likely to be:
(i) Calcium hydroxide?
(1) Rain water?
Answer:
The calcium hydroxide solution will likely have the pH of 14 (very basic) while rain water will likely have a pH if 6.5 (slightly acidic).
A compound with an empirical formula of CH2O has a molar
mass of 60 g/mol. What is its molecular formula?
Answer:
c2h4o2
Explanation:
I am using my cell. This could take a bit
The Empical formula has a mass of
C 12
2H 2
O 16
total = 30
The molecular mass is given as 60 which is 2 times the empirical mass. Therefore multiply each element by 2 in the empirical formula.
You get C2H4O2