A sample of a gas has a mass of 14.2g and occupies a volume of 0.678 liters at 25 C and a pressure of 0.80 atm. what is the density of a gas under these conditions

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The 2 in front of [tex]Na[/tex] in [tex]2Na + Cl_2 \rightarrow 2NaCl [/tex] is Coefficient.

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The [tex] _2 [/tex] after [tex] Cl_2[/tex] in the same equation is sub script.

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There are two atoms of [tex]Na[/tex] in [tex]2NaCl[/tex]

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Specific heat is the amount of heat required to raise the temperature of a material by 1°c per mass

Specific heat is defined as the amount of heat energy required to elevate the temperature of a material by  1°C  per unit mass.

It is a material's physical attribute. The joule per kelvin per kilogram (J/K/Kg) is the standard international measurement of heat capacity.

If a substance has a high specific heat, it simply implies that it will take a long time to heat up, but it will also take a long time to cool down once heated. Water has the highest specific heat value.

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On adding 200g hydrochloric acid to excess calcium carbonate, the percent yield of carbon dioxide is equal to 82.84%.

200g of HCl was added to an excess amount of calcium carbonate to produce 100g of carbon dioxide along with water and calcium chloride. The reaction is written as:

CaCO₃ + 2HCl → H₂O + CO₂ + CaCl₂

Since calcium carbonate is excess, two moles of hydrochloric acid gives rise to one mole of carbon dioxide.

To calculate the percent yield, we can use stoichiometry,

The molar mass of hydrochloric acid = 36.46 g/mol

The molar mass of carbon dioxide = 44.01 g/mol

To calculate theoretical yield,

200g HCl/1 × 1 mole HCl/36.46g HCl × 1 mol CO₂ /2mol HCl × 44.01 mol CO₂/ 1 mole CO₂

= 120.707 g

To calculate the percent yield,

The amount of CO₂ produced = 100g

Dividing 100 by the theoretical yield

=  100/120.707 = 0.8284

Now multiplying the value by 100

= 0.8284 × 100 = 82.84 %

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Yes carbon dioxide and oxygen are inversely related to each other.

Bohr effect is a result of the effect of carbon dioxide has on hemoglobin affinity for oxygen. Bohr's effect describes the hemoglobin's lower affinity for oxygen secondary to increases in the partial pressure of the carbon dioxide and decreases the pH of blood. This lower affinity, in turn, enhances the unloading of oxygen into the tissues to meet the oxygen demand of the tissue.

Thus, the relationship between CO₂ and hemoglobin affinity for oxygen can be described as an inverse relationship meaning when one goes one way, and the other goes the other way.

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Answer: I belive it is HH to h-c-n

Explanation: yea

We measure distance by using a ruler to measure the distance between the two places.

Distance is defined as the amount of the space between the two place or the things.

Short distances can be measured in centimeters (cm), and the long distances may be measured in kilometers (km). SI unit of the distance is meter (m). Distance is the length of the route between the two points. For example: Distance of a race; it is the length of the track between the starting line and the finishing line.

Maps can also be used to measure the distance. The name of the scale is map's bar scale.  

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The correct answer is option A. The mass of the sample decreased, so physical changes occurred as the metal first melted and then boiled out of the crucible. The decrease in mass is a result of the metal melting and then vaporizing as it is heated.

Physical changes refer to changes in the physical properties of a substance without altering its chemical composition. Examples of physical changes include melting, freezing, condensation, vaporization, sublimation, and physical state changes. Physical changes occur when a substance changes from one state of matter to another without a chemical reaction taking place.

This is an example of a physical change, as the material is changed from a solid to a liquid and then to a gas, but its chemical composition remains the same.

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For 2 moles of oxygen atoms, there are Avogadro's number (6.022 x 10^23) atoms. For 2 moles of oxygen molecules, there are twice that amount, or 12.044 x 10^23 atoms.

What are Atoms?

Atoms are the smallest particle of any element that still maintains the properties of that element. Atoms are made up of a nucleus surrounded by one or more electrons. The nucleus is composed of protons and neutrons, and the electrons orbit around the nucleus. Atoms of different elements have different numbers of protons, neutrons, and electrons, which is what gives them their unique properties.

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Energy released in the reaction in which a proton fuses with a neutron to form a deuterium nucleus is calculated as 2.234 MeV.

In fusion reaction, two light nuclei merge to form single heavier nucleus. The process releases energy because total mass of the resulting single nucleus is less than the mass of two original nuclei. And the leftover mass becomes energy.

form a deuterium nucleus: 1^1H+0^1n⟶1^2H+γ The masses are 1^1H(1.0078u) 0^1n(1.0087u) and 1^2H(2.0141u) the γ -ray photon is massless.

Δm= 1.0078 +1.0087- 2.0141

Energy released = 2.4*10^-3 * 931 MeV

= 2.234 MeV

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Dimensional evaluation makes use of conversion elements to use the unit in an quantity into an equal amount expressed with a exclusive unit.

For example, a conversion aspect might be used to transform meters to centimeters. Dimensional evaluation (additionally referred to as aspect label approach or unit evaluation) is used to transform from one set of gadgets to another. This approach is used for each simple (ft to inches) and complex (g/cm3 to kg/gallon) conversions and makes use of relationships or conversion elements among exclusive units of gadgets. A conversion ratio (or unit aspect) is a ratio same to one. This ratio includes the names of the gadgets for use withinside the conversion. It may be used for conversions in the English and Metric Systems, in addition to for conversions among the systems. The conversion unit is primarily based totally upon the idea of equal values.

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Answer:

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Answer:

The net ionic equation of the given reaction is:

Mg (s) + 2 H⁺ (aq) → Mg²⁺ (s) + H2 (g)

Explanation:

When magnesium metal (Mg) is treated with hydrochloric acid (HCl), then it displaces the hydrogen gas from the acid

.- Magnesium gets attached with the chlorine and hydrogen gas is evolved as a product in the reaction.

- We have not mentioned chlorine in the reaction as it is not undergoing any change during the reaction.

Answer:

Electricity has the ability to do work. b. hope dis helps

Explanation:

Answer:

No matter how a seed is planted, the root will orient itself towards the pull of gravity in the downward direction. This is known as geotropism.

P4O10(s) + H2O(l) --> H3PO4(aq)

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A. CO2 + 2H2O + ENERGY

THIS IS THE ANSWER

The moles of ammonia needed to produce 1.3 mole of water is 0.84 mol.

balance chemical equation for the reaction

[tex]4NH_{3}+5O_{2}- > 4NO +6H_{2}O[/tex]

In chemistry, stoichiometry is the measurement of the ratios in which different substances or elements interact. The laws of conservation of mass, energy, and weights or volumes serve as the foundation for the rules used to determine stoichiometric relationships.

stoichiometric moles of ammonia reacting = [tex]\frac{moles}{stoichiometry}[/tex]

stoichiometric moles of water reacting = [tex]\frac{1.3}{6} =0.21[/tex]

0.21 stoichiometric moles of water is given by 0.21 stoichiometric moles of water

so moles of ammonia will form = stoichiometric moles * stoichiometry

moles of ammonia will form = 0.21 * 4  = 0.84 mol

so moles of ammonia produced by reaction = 0.84 mol

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Answer:

Most plastic is chemically inert and will not react chemically with other substances -- you can store alcohol, soap, water, acid or gasoline in a plastic container without dissolving the container itself.

Explanation:

Answer:

Most plastic is chemically inert and will not react chemically with other substances -- you can store alcohol, soap, water, acid or gasoline in a plastic container without dissolving the container itself.

Explanation:

Hope it helps u

FOLLOW MY ACCOUNT PLS PLS

Answer: K

Explanation: as we move down the group new shells are added and this increases the distance between the outermost electron and the nucleus.

The empirical formula for this compound containing 59.94 % carbon, 13.44 % hydrogen, and 26.62 % oxygen by mass is C3H8CO.

Given the % of carbon = 59.94%

The % of hydrogen = 13.44%

The % of oxygen = 26.62%

If a percentage is provided, we will assume that the entire mass is 100 grams. As a result, each element's mass is equal to the percentage indicated. Then

the mass of carbon (m1) = 59.94g

The mass of hydrogen (m2) = 13.44g

The mass of oxygen (m3) = 26.62g

We know the molar mass of C = 12 g/mole

The Molar mass of H = 1 g/mole

The Molar mass of O = 16 g/mole

The moles of carbon = 59.94/12 = 4.995

The moles of hydrogen = 13.44/1 = 13.44

The moles of oxygen = 26.62/16 = 1.664

Divide each mole value by the lowest computed mole number to get the mole ratio.

For C = 4.995/1.664 = 3 , For H = 13.44/1.664 = 8 and For O = 1.664/1.664 = 1. Then the empirical formula = C3H8CO

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An empty bottle has volume of 2 L at room temperature 25°C . If we put it in the freezer (-4°C), the new volume will be 1.8L.

According to Charles' law, " the volume of a given amount of gas held at constant pressure is directly proportional to the kelvin temperature". The equation is represented as:

V₁/T₁ = V₂/T₂

This means, with increase in temperature, volume will also increase and vice versa.

According to question,

V₁ = 2.0 L

T₁ = 25°C = (25+273)K = 298 K

T₂ = -4°C = (-4 + 273)K = 269 K

Using Charles' law equation,

V₁/T₁ = V₂/T₂

⇒V₂ = V₁×T₂ / T₁

⇒V₂ = 2L × 269 K/298K

⇒V₂ = 1.8 L

Thus, the new volume when the bottle is put in a freezer (-4°C ) is 1.8 L

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4 liters of 30% acid must be added to 2 liters of 15% acid to result in a mixture that is 25% acid.

To find the amount of 30% acid that must be added to 2 liters of 15% acid to result in a mixture that is 25% acid, we can use the concept of percentage concentration. The percentage concentration is defined as the ratio of the number of moles of solute (in this case acid) to the total number of moles of the solution.

Let's call x the number of liters of 30% acid to be added. Then the final volume of the solution is (2+x) liters.We know that the final concentration of the solution is 25%, so we can write the following equation:

(moles of acid in 2 liters of 15%) + (moles of acid in x liters of 30%) / (2+x) = 0.25

We can now use the percentage concentration to find the number of moles of acid in each volume of acid:

moles of acid in 2 liters of 15% = (2L * 0.15) = 0.3 moles

moles of acid in x liters of 30% = (xL * 0.30) = 0.30x molesWe can now substitute these values in the equation above:

(0.3) + (0.30x) / (2+x) = 0.25

Solving for x we can find the volume of 30% acid that needs to be added to the 2 liters of 15% acid:

0.3 + 0.30x = 0.25(2+x)

0.3 + 0.30x = 0.5 + 0.25x

0.05x = 0.2

x = 4 L. Therefore, 4 liters of 30% acid must be added to 2 liters of 15% acid to result in a mixture that is 25% acid.

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Taking into account the reaction stoichiometry, an amount of 84 moles of H₂ are needed to react with 28 moles of nitrogen.

In first place, the balanced reaction is:

N₂ + 3 H₂  → 2 NH₃

By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:

It can be applied the rule of three: If by reaction stoichiometry 1 mole of N₂ react with 3 moles of H₂, 28 moles of N₂ react with how many moles of H₂?

moles of H₂= (28 moles of N₂×3 moles of H₂)÷1 mole of N₂

moles of H₂= 84 moles

Finally, 84 moles of H₂ reacted.

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Answer:

a. 2H2 + O2--> 2H2O

b. 2ZnS +3O2-->2ZnO +2SO2

Explanation:

a.

note:

(when you put coefficients before the elements or the compounds you should multiply it by each element and the number that's on its right...

so if it's 2H2O

that is 2xH2 which is 4 hydrogen atoms

and 2 x O which is 2 oxygen atoms )

......

on the left side of the equation

there are two atoms of oxygen

but on the right side there's only one atom

so in order to balance them you have to put 2 as a coefficient for H2O

H2+O2 ->2H2O

so now you have 2 hydrogen atoms on the left side and 4 on the right side

you put 2 as a coefficient for H2

and now

there's 4 hydrogen atoms on both sides

and 2 oxygen atoms on both sides

b.

you do the same here

ZnS + O2 -> ZnO + SO2

2 oxygen atoms ---> 3 oxygen atoms

ZnS + 2O2 -> ZnO + SO2

4 oxygen atoms ---> 3 oxygen atoms

ZnS + 2O2 -> 2ZnO + SO2

4 oxygen atoms ---> 4 oxygen atoms

but

1 Zn ---> 2Zn

2ZnS + 2O2 -> 2ZnO + SO2

2S --> 1S

2ZnS + 2O2 -> 2ZnO + 2SO2

2S--> 2S

but

4O---> 6O

2ZnS + 3O2 -> 2ZnO + 2SO2

When a sample of a substance was heated strongly in a crucible, the sample increased in mass. This is evidence that a chemical change has taken place.

In a closed system, when no heat or energy is applied, the mass of a substance will remain the same. But, when heated at high temperatures, the average kinetic energy of the particles of a substance increase due to which the particles will move faster, and collide with each other and take up more space. There will be transfer of energy due to application of heat. As a result of this the mass of the sample also increases.

Hence, option D is correct

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The order of Sy2 reactivity for the sets of compounds you provided would be:

Compound B (H2C=CHCH2CI)

Compound C (CI)

Compound A (CI)

This is because Compound B has the greatest electron-donating ability due to the presence of the alkyl group attached to the carbon bearing the halogen, making it the most nucleophilic and therefore the most reactive in an Sy2 reaction. Compound C is less reactive than B because it lacks the electron-donating alkyl group, and Compound A is the least reactive due to the lack of electron-donating groups.The term "Sy2 reactivity" refers to the reactivity of a compound in a nucleophilic substitution reaction where the leaving group is displaced by a nucleophile. The abbreviation "Sy" stands for "substitution" and the subscript "2" indicates that the reaction is bimolecular, meaning that the rate of the reaction is dependent on the concentrations of both the substrate and the nucleophile.

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A ring stand is used to hold glassware devices during laboratory procedures.

Ring stands and accessories can make your lab experiments much easier if you are studying chemistry or physics.
        A ring stand and its accessories are versatile pieces of equipment that will improve your hands-on activities by allowing you to conveniently heat beakers, flasks, test tubes, and other glassware over an alcohol burner, as well as set up physics apparatus such as moveable pulleys and inclined planes.
        Each accessory is supported by a heavy base and an upright rod on the ring stand. To support additional equipment, a ring support is attached to the stand. Glassware is supported above an alcohol burner by wire gauze resting on the ring. To support funnels, crucibles, and evaporating dishes, the triangle rests on the ring. Burettes and test tubes are held in the burette clamp.

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Answer:

An additional advantage of asexual reproduction is that colonization of new habitats may be easier when an individual does not need to find a mate to reproduce. During sexual reproduction the genetic material of two individuals is combined to produce genetically diverse offspring that differ from their parents.

Explanation:

An organism has many benefits for having the ability to reproduce both sexually and asexually. The first of these benefits is that it doesn't have to find a mate in order to reproduce, so it can create offspring by itself, and enable the continuation of its' species.

If you need more help on this subject, don't be afraid to ask me. I'm willing to help.

Prevent the spread of dusts and vapors.Neutralize acids and bases, if feasible. Manage the spread of the liquid.absorb the liquid.Gather and incorporate the cleanup residues. Get rid of the wastes. Decontaminate the area and affected system.

Chemical spills are the uncontrolled launch of a dangerous chemical, both as a strong, liquid or a gas. these spills need to be minimized as tons as possible.

Chemical spills usually result from the dangerous handling of chemical compounds, incorrect chemical storage, chemical garage tank ruptures, incorrect containers for chemical disposal, and failure to eliminate chemical substances in a well timed way.

There are sorts of spills that you can run into: simple Chemical Spills and complex Chemical Spills. easy Chemical Spills are small, confined, and present minimal dangers.

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