Answer:
The Earth formed billions of years after the Universe formed
Explanation:
The "universe" is said to have been formed billions of year ago through an explosion. This was called the "Big Bang Theory." This lead to the expansion of the universe owing to its high temperature and density. After which, the universe cooled down. Galaxies and stars were then formed. Some of the stars died due to explosion, which then led to the creation of planets. Such formation of the planets happened around 4.5 billion years ago. This is 9.3 billions of years later than the universe was formed (13.8 billions of years ago). So, this explains the answer.
Proteins are
A) built in the nucleus by DNA and transported to the ribosomes.
B) converted from nucleic acids to amino acids in the nucleolus.
C) made on ribosomes and then transported to golgi appartus.
D) created in the nucleus and then shipped to the parts of the cell where they are needed
Answer:
I would say B
Explanation:
If I'm wrong I apologize, have a good day
[tex] \huge \mathfrak \red{hello...}[/tex]
[tex] \blue{The \: correct \: answer \: is \: (C).}[/tex]
Thanku...hey martin991 im sorry i just realized that was a dif account please forgive me plz help me and HAPPY NEW YEAR ♧
Energy stored in the bonds between atoms is called
A.kinetic energy.
B.mechanical energy.
C.chemical energy.
D.thermal energy.
Answer:
A. Kinetic energy
Explanation:
Kinetic energy is stored in the bonds between atoms.
Which of the following statements about nonmetal elements is true?
A.) Nonmetal elements are stronger than metals.
B.) Nonmetal elements are never used in computers.
C.) Nonmetal elements are sometimes cheaper to make.
D.) Nonmetal elements are used only in laptop computers.
Answer:
C
Explanation:
The statement which is true about non-metal elements is as follows:
Nonmetal elements are sometimes cheaper to make.Thus, the correct option for this question is C.
What are Non-metals?Non-metals may be defined as those chemical elements that significantly lack the attributes of metals. They generally range from colorless gases to shiny and high melting point solids. Some examples of non-metals include boron, carbon, nitrogen, etc.
Non-metals are not stronger than metals because the arrangement of bonds in metals is highly compacted. Non-metals are very frequently utilized in the manufacture of computers, laptops, and other electronic devices along with metals. But most of the time non-metals are cheaper to synthesize.
Therefore, non-metal elements are sometimes cheaper to make is a statement that is true about non-metal elements. Thus, the correct option for this question is C.
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Silicon has 2 isotopes, Silicon-28 with an abundance of 90% and Silicon-30 with an abundance of 10%. Find the AAM for Silicon.
Answer:
RAM
[tex]RAM = (mass \: of \: ^{28} Si \: \times \%abundance) + (mass \: of \: ^{30} Si \: \times \%abundance) \\ RAM = (28 \times 90\%) + (30 \times 10\%) \\ RAM = 25.2 + 3 \\ RAM = 28.2[/tex]
Balance the following chemical
equation by providing the correct
coefficients.
[? ]FeBr3 + []Na2S → Fe2S3 + NaBr
Answer:
2FeBr₃ + 3Na₂S → Fe₂S₃ + 6NaBr
Explanation:
The expression to be balanced is given as:
FeBr₃ + Na₂S → Fe₂S₃ + NaBr
To balanced this chemical equation, we can use a simple mathematical approach.
Simply use the alphabets a, b, c and d to represent the numbers that will make the equation balanced;
aFeBr₃ + bNa₂S → cFe₂S₃ + dNaBr
Conserving Fe;
a = 2c
Conserving Br;
3a = d
Conserving Na;
2b = d
Conserving S;
b = 3c
Let a = 1, b = [tex]\frac{3}{2}[/tex]
c = [tex]\frac{1}{2}[/tex] d = 3
Multiply through by 2 to get whole number ratios;
a = 2, b = 3 , c = 1 and d = 6
2FeBr₃ + 3Na₂S → Fe₂S₃ + 6NaBr
The force of gravitational attraction between two objects depends on the distance between the objects and their_____ 1. Buoyancies 2. Temperature 3. Masses 4. Shapes
Answer:Newton's law also states that the strength of gravity between any two objects depends on two factors: the masses of the objects and the distance between them.
Objects with greater mass have a stronger force of gravity between them. ...
Objects that are closer together have a stronger force of gravity between them.
Explanation:
hope it helps
Answer:
masses
Explanation:
Dr. Murrays science class recently read about an experiment that had surprising results. The decided to perform the experiment in their class, but they used more advanced methods. Their results
The question is incomplete, the complete question is;
Dr. Murray's science class recently read about an experiment that had surprising results. They decided to perform the experiment in their class, but they used more advanced methods. Their results
must be completely different, but they are more reliable.
could be the same as before, or they could be completely different.
must be the same as the recorded results, but they are more reliable.
could be the same as the recorded results, or they must be inconclusive.
Answer:
could be the same as before, or they could be completely different.
Explanation:
Now we know that in carrying out a scientific research, there is such a thing as replication.
Replication means that other scientists in other places carry out the same experiments previously done and expect to obtain the same results as the first time the experiment was done.
However, this is not a case of replication because a different and more advanced method was used in the experiment. Once the methodology of the experiment has been changed, then the results could be the same or different. Hence the answer above.
Dry hydrogen chloride was bubbled in methylbenzene and sodium carbonate added . Explain this observation.
Answer:
No observable change, unless dry hydrogen Chloride reacted in presence of a peroxide (ROOR)
Explain the horizontal periodic trend
Answer:
Trends on the Periodic Table have a vertical component and a horizontal component. Vertical trend: as more “shells” are added to the electron cloud, it expands. Horizontal trend: if atoms have the same number of “shells”, atoms with more protons will draw the electron cloud in tighter.
Explanation:
TOPICAL ASSINMENT 2
1. If 25cm' of O.IM H,SO, solution neutralised a solution containing 1.06g anhydrous sodium carbonate in
250cm. of solution, calculate the molarity and the volume of the sodium carbonate solution used. (3mks)
The molarity = 0.04 M
The volume = 6.25 ml
Further explanationGiven
25cm³ of 0.1 M H₂SO₄
1.06g Na₂CO₃ in 250cm³ of solution
Required
the molarity and the volume of Na₂CO₃
Solution
Molarity of Na₂CO₃ :
[tex]\tt \dfrac{1.06/106~mol}{0.25~L}=0.04~M[/tex]
Reaction
H₂SO₄ + Na₂CO₃ ⇒Na₂SO₄ + H₂O + CO₂
mol H₂SO₄ = 25 x 0.1 = 0.25 mlmol= 2.5 x 10⁻⁴ moles of Na₂CO₃
The volume of solution used :
[tex]\tt V=\dfrac{n}{M}=\dfrac{2.5.10^{-4}}{0.04}=6.25.10^{-3}~L=6.25~ml[/tex]
The southern United States experiences periodic occurrences of severe cold and drought conditions. Which weather phenomenon most likely causes this and why?
The weather phenomenon that most likely causes periodic cold is:
La NinaThis is caused by the:
Jet stream which moves to the south sideIn the Southern United States, there is a weather phenomenon which occurs when there is only a periodic occasion of severe cold. This happens because of what is called La Nina that occurs as a result of the movement of the jet stream.
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Identify the reaction type shown and describe the clues that were used to identify it. Fe2O3 + 2SiO2 → Fe2Si2O7
The type of reaction of Fe2O3 + 2SiO2 → Fe2Si2O7 would be that it is a synthesis reaction. It is a type of chemical reaction in which two or more simple substances combine to form a more complex product.
Answer:
The type of reaction of Fe2O3 + 2SiO2 → Fe2Si2O7 would be that it is a synthesis reaction. It is a type of chemical reaction in which two or more simple substances combine to form a more complex product. Hope this answers the question.
Explanation:
2) If 100.0 J of heat are added to 20.0 g of water at 30.0°C, what will be the final
temperature of the water? What would the temperature be in Kelvin?
What is the electron configuration for sulfur?
A. 1s2 2s2 2p6 3s2 3p4
B. 1s2 1p6 2s2 2p6 3s2
C. 1s2 2s2 2p6 3s2 3p3 4s1
D. 1s2 2s2 2p6 3p1 3d5t
Answer:
A. 1s2 2s2 2p6 3s2 3p4Explanation:
i hope it helps :)
Answer:
1s2 2s2 2p6 3s2 3p4
Explanation:
below
How many oxygen atoms are there in 5 molecules of Al2(SO4)?
Answer:
There are two aluminum ions and three sulfate ions; or two aluminum, three sulfur, and twelve oxygen atoms.
Explanation:
In 5 molecules of Al₂( SO₄ ) there are 20 oxygen atoms are present. In one molecule of aluminum sulphate there are 4 oxygen atoms present and in 5 molecules of Al₂( SO₄ ) 20 oxygen atoms present.
What is molecule ?According to the environment, the word may or may not include ions that meet this requirement. A molecule is a collection of two or more atoms bound together by the attractive forces known as chemical bonds.
There are three different kinds of molecules: atom-sized molecules, element-sized molecules, and compound-sized molecules.
A molecule is the smallest unit of any material that is composed of one or more elements and is capable of existing independently while maintaining all the substance's physical and chemical characteristics. Further atom division occurs within molecules.
Thus, In 5 molecules of Al₂( SO₄ ) there are 20 oxygen atoms are present.
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Which of the following salts has a 3 to 2 ratio of cations to anions?
O Barium Nitride
O Barium sulfide
Barium chloride
O Barium oxide
Explanation:
kind of ion formed (anion or cation) and the size of the ionic charge. ... O-‐2 oxide. S-‐2 sulfide. N-‐3 nitride. P-‐3 phosphide. Table 3.1. Common, simple anions. It is critically important that you distinguish between ...
Ions and Ionic Compounds – Introductory Chemistry – 1st Canadian Edition - BC Open Textbooks
opentextbc.ca › chapter › ions-and-ionic-...
The formula Na 2Cl 2 also has balanced charges, but the convention is to use the lowest ratio of ions, which ... For the ionic compound between magnesium cations (Mg 2+) and oxide anions (O 2−), again we need only ...
[PDF] Tutorial 2 FORMULAS, PERCENTAGE COMPOSITION, AND THE MOLE FORMULAS: A chemical formula shows the elemental composition of a sub
www.eiu.edu › eiuchem › forms › t...
Ba2+ barium. HSO3. – hydrogen sulfite. MnO4. – permanganate. Al3+ aluminum. SO4. 2– sulfate. NO2. – nitrite. Sn2+ tin(II). HSO4. – hydrogen sulfate. NO3. – nitrate. Sn4+ tin(IV). S2O3. 2– thiosulfate. OH– hydroxide.
Symbols and Charges for Monoatomic Ions
www.edu.xunta.es › portal › Nomenclature
Cs+ cesium ion O2- oxide. Be2+ beryllium ion S2- sulfide. Mg2+ magnesium ion Se2- ... one K+ and one Cl¯ are required. The resulting formula is KCl. Example 3: Write the formula from the following name: barium
Barium chloride salts has a 3 to 2 ratio of cations to anions. thus option C is correct.
what are the properties of barium chloride ?Barium Chloride an inorganic salt which is composed up of barium cations (Ba2+) and chloride anions (Cl–), otherwise named as Barium Muriate or Barium dichloride.
It is a white solid , water-soluble, hygroscopic and gives a slight yellow-green color to a flame, extensively used in the industry mainly The sulfate is used in white paints where as Barium chloride is poisonous in nature.
It is soluble in water which dissociate into barium cations and chloride anions in its dissolved state, However, the solubility of this compound in water is temperature-dependent.
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SHOW WORK
A hummer weighs 3.2 tons, what is the weight in pounds (lbs)?
Helpppp
Which of these is the BEST
description of extinction?
Answer:
d
Explanation:
Ethyl alcohol evaporates faster then water, why?
Explanation:
as alcohol evaporates at much faster rate compared with water due to its lower boiling temperature (82 compared to 100 degree Celsius), it is able to carry away more heat from the skin. this means for a given amount of time much more alcohol evaporates than water.
hope it helps you
Choose all the answers that apply.
Multicellular organisms _____.
are made of more than one cell
are made of only one cell
reproduce by mitosis
have differentiated cells
reproduce through the union of sperm and egg cells
Answer:
a. Are made of more than one cell.
Explanation:
I majored in Chemistry
Answer:
a. Are made of more than one cell.
Explanation:
chemical formula for tin iv carbide
Answer:
Explanation:
Sn(WC)2
if it is tungsten carbide this should be correct but there are many versions of carbide
Sn(MC2)2
could also be possible
the 2 next to MC should be a subscript
two gasses in the air that cause rusting
Answer:
oxygen and Hydrogen
Explanation:
Oxygen and Hydrogen causes rusting on metals after combining with moisture
hey what's the value of pi till
5 digits after decimal
Answer:
Pi to 5 decimals is 3.14159-
Brainlist pls!
P.S. It's a repeating number, but you can just put a (-), so that you don't have to type the whole thing out.
Answer:
sorry raaz report mat kerna
points collect kr rehe hai
________ is the enthalpy change when 1 mole of a substance is formed from its elements under standard conditions.
A. ΔHθc
B. ΔHθn
C. ΔHθf
D. ΔHθa
The correct answer is C. ΔHθf
We define the standard enthalpy of formation as the enthalpy change when one mole of a substance is formed from its elements under standard conditions. The standard conditions are 1 atm pressure, 273 K temperature and 1 M concentration.
The standard enthalpy of formation is denoted using the symbol ΔHθf.
Hence, ΔHθf is the enthalpy change when 1 mole of a substance is formed from its elements under standard conditions.
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Calculate the mass of .0605 moles of crystalline sucrose. Sucrose is C12 H22 O11 . The molar mass is __________ g/mole. Show your work below and record your answer.
Answer:
20.7g/mol
Explanation:
What can happen when tectonic plates move a few centimeters?
A. The atmosphere can become cooler.
B. Whole continents can move.
C. The ozone layer can thicken.
D. The moon can move closer to Earth.
Answer: B. Whole continents can move
Explanation:
Answer:the answer is b Whole Contenints can move
Explanation:took the test and got it right
What does dehydration cause?
Dehydration can lead to a loss of strength and stamina. It's a main cause of heat exhaustion. You should be able to reverse dehydration at this stage by drinking more fluids. If dehydration is ongoing (chronic), it can affect your kidney function and increase the risk of kidney stones.
[I copied this from the internet, but hope this helps!]
(03.06 HC)
The boiling point of bromine is 59 °C. Which of the following best predicts the boiling point of iodine monochloride, a polar compound?
Group of answer choices
Lower than 59 °C because ionic bonding in bromine is stronger than covalent bonding in iodine monochloride.
Lower than 59 °C because dipole-dipole interactions in iodine monochloride are weaker than in bromine.
Higher than 59 °C because dipole-dipole interactions in iodine monochloride are stronger than dispersion forces in bromine.
Higher than 59 °C because ionic bonding in iodine monochloride is stronger than H-bonding in bromine.
Answer:
higher than 59 c because dipole- dipole interactions in iodine monocholoride are stronger than dispersion forces in bromine
The boiling point is the temperature at which the pressure of the liquid is equal to the vapor pressure. The b.p of iodine monochloride will be higher than 59 °C because dipole-dipole interactions are stronger. Thus, option C is correct.
What is a dipole-dipole interaction?A dipole-dipole interaction is the type of electrostatic attractive force that exists between the positive and the negative side of the polar molecule. They are strong interactions between polar molecules.
The Iodine monochloride (ICl) has a higher boiling point as compared to bromine as the former is a polar molecule with a dipole-dipole bond. The bromine shows the dispersion forces that are the weakest forces.
The polar molecules have differences in their electronegativities that make them have strong dipole interactions. As a result, will need higher temperatures to break bonds.
Therefore, option C. ICl will need a higher boiling temperature than bromine due to the presence of strong dipole forces.
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What type of bond is formed between sodium and sulfur
Answer:
The Bond would Be ionic
Explanation:
Thier electronegativites are way to differnt so Sulfur would steal from Sodium
Which group of elements will completely fill their s and p valence subshells?
Answer:
Nobel Gases will have a full p valance shell aswell as a s subshell
Explanation: