Answer:
A. True
Explanation:
Anytime something burns, you're seeing oxidation. That means an atom, molecule or ion loses one or more electrons.
Answer:
B. 4.52 X10-9 M
Explanation:
Our goal for this question is to <u>calculate the concentration of hydronium ions</u> produced by water in a vessel with a concentration of hydroxide ions of . So, our first approach can be the <u>ionization reaction of water</u>:
If we write the <u>Keq expression</u> for this reaction we will have:
Now, water is the universal solvent, so, Keq has a special name. In the equilibrium problems for water we have to use <u>"Kw" instead of "Keq"</u>:
From this equation, we know the Kw value () and the concentration of the hydroxide ions ([2.21X10^-^6~M]). If we replace these values into the equation we can solve for :
I hope it helps!
The answer that fits the given blank above is the term ASSIMILATION. In the process of assimilation, there is a large production of organic nitrogen and this includes amino acids, other proteins, and nucleic acids. This is when nitrogen is converted into ammonia.
Answer:
The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotopе). An element does not have an absolute atomic mass.
<em>Hope</em><em> this</em><em> </em><em>helps</em><em> </em><em>:</em><em>)</em>
1 mol is (always) the same number of units: 6.02 * 10^23 units.
So 0.5 moles of any gas has the same number of molecules.
Also, we know by the ideal gas laws that a give number of molecules of any gas will occupy the same volume.
Given that the three gases have the same number of atoms in the molecular fomula (2), 0.5 moles will also have the same number of atoms.
g.f.w. stands for grams formula weight and that is different for all of them, because gfw is calcualted from the atomics masses of each atom in the molecule.
Then at STP (standard temperature and pressure) conditions 0.50 moles of any of the gas:
- will contain the same number of molecules,
- will contain the same number of atoms
- will occupy the same volume.