<h3>
Answer:</h3>
5.0 × 10^21 atoms of sulfur
<h3>
Explanation:</h3>
We need to know that 1 mole of an element contains atoms equivalent to the Avogadro's number.
Therefore;
1 mole of an element = 6.022 × 10^23 atoms
Thus, 1 mole of sulfur = 6.022 × 10^23 atoms
But, molar mass of sulfur = 32.065 g/mol
This means;
32.065 g contain 6.022 × 10^23 atoms
Therefore, 2.66 g of Sulfur will contain;
= (2.66 g ÷ 32.065 g/mol) × 6.022 × 10^23 atoms
= 5.0 × 10^21 atoms
<em>Answer:</em>
- Conc. of K+ ions = 0.90 M
- Coc. of SO4∧-2 = 0.45 M
<em>Explanation:</em>
<em>Data Given:</em>
Conc. of H2SO4 = 0.450
As sulphoric acid is a strong electrolyte, it completely dissociate into ions.
H2SO4 ⇆ 2K+ + SO4∧-2
.450 M K2SO4 means that there is .450 mols of K2SO4 in every liter of solution.
K2SO4 : K+ K2SO4 : SO4∧-2
1 = 2 1 = 1
0.450 = 2× 0.450 = 0.90 0.450 = 0.450×1 = 0.450
<em> Result:</em>
Conc. of potassium ion will be 0.90M
Coc. of sulphate ions will be 0.45 M
0.00167265 mm
Explanation:
Given the spacing between the molecules in the crystal is 15.93 nm.
1 nm = 
m
so 15.93 nm = 15.93 * = 1.593 * 
m
Spacing between 2 molecules is 1.593 * m
So total width of 105 molecules crystal is 1.593 * *105 = 167.265 * m
We know that
1 m = 1000 = 
mm
So total width of 105 molecules crystal in millimeters is 167.265 * *
= 167.265 * 
= 1.67265 * 
mm = 0.00167265 mm
Gravity is the force that pulls two objects together
It is a elastic wave made by an earthquake or other means
