(2) 2.0 L of CH4(g) is your answer.
According to Avogadro's law, all gases have equal volume if there are equal number of particles under the same conditions. Therefore, we can use the corollary to state that all gases have equal number of particles if they have the same volume, and the only choice with 2.0 L was #2, therefore #2 was your answer.
Answer:
1.272 moles are contained in 42 grams of water.
Explanation:
Chemically speaking, ice is the solid form of water and a molecule of water consist of two atoms of hydrogen and an atom of oxygen. Furthermore, atomic masses of hydrogen and oxygen are and , respectively. A mole is the ratio of current mass of water to molecular weight of water, the latter one is now calculated before computing the amount of moles of water:
Finally, the amount of moles contained in 42 grams of ice is:
1.272 moles are contained in 42 grams of water.
Answer:
B - Mass is never made or lost during a chemical reaction
Explanation:
This is, quite frankly, the Law of Conservation of Mass. :)
Answer:
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The correct answer for the question that is being presented above is this one:
<span>
Boron </span><span>consists of two isotopes, boron-10 and boron-11.
</span>Given that its relative atomic mass is 10.2
Find the abundance of each isotope.
Let y/100 = the abundance of copper-10
and (100 - y)/100 = the abundance of copper-11
10.2 = (y/100 x 10) + [(100 - y)/100 x 11]
10.2 = 10y/100 + 1100/100 - 11y/100
1020 = 10y + 1100 - 11y
-80 = -y
y = 80
Abundance of boron-10 = 10/100 = 10%
Abundance of boron-11 = 100 - 10 = 90%