Answer:
51.15 × 10²³ moles of MnO₄
Explanation:
Given data:
Number of molecules of MnO₄ = 308 molecule
Number of moles of MnO₄ = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
For 308 molecules of MnO₄:
308 molecules of MnO₄ × 1 mole / 6.022 × 10²³ molecules of MnO₄
51.15 × 10²³ moles of MnO₄
Answer:
<h2>when the pH is 7 it turns green</h2>
Explanation:
<h3>In the middle, neutral pH 7 is indicated by green.</h3>
<u>i</u><u>n </u><u>water </u><u>also</u>
Assuming that the ammonium sulfide formula is (NH4)2<span>S then you can see that there are 2 nitrogen, 8 hydrogen and 2 sulfur atoms for every ammonium sulfide. If the amount of ammonium sulfide is 8.9 moles, then the number of hydrogen atoms should be: 8/1 * 8.9 mol= 71.2 moles.
If you are asked the number of individual atoms you need to multiply it with Avogadro number like this : </span>71.2 moles * 6.02 * 10^23= 4.28 *10^25
Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).
