# of molecules/atoms in each (show your work) a. 0.572 moles of Al
b. 1.45x10² moles of SO2
c. 6.25 moles of Ca (OH)2
d. 0.0024 moles of CO2

3.44× 10²³ atoms

8.73× 10²⁵ molecules

37.64 × 10²³ molecules

0.014 × 10²³ molecules

Explanation:

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

a) 0.572 moles of Al:

1 mole = 6.022 × 10²³ atoms

0.572 mol  ×  6.022 × 10²³ atoms / 1 mol

3.44× 10²³ atoms

b) 1.45× 10² moles of SO₂:

1 mole = 6.022 × 10²³ molecules

1.45 mol × 10² ×  6.022 × 10²³ molecules / 1 mol

8.73× 10²⁵ molecules

c) 6.25 moles of Ca(OH)₂

1 mole = 6.022 × 10²³ molecules

6.25 mol  ×  6.022 × 10²³ molecules / 1 mol

37.64 × 10²³ molecules

d) 0.0024 moles of CO₂

1 mole = 6.022 × 10²³ molecules

0.0024 mol  ×  6.022 × 10²³ molecules / 1 mol

0.014 × 10²³ molecules

answer: the rate of diffusion increases with increase in temperature.

increase in temperature, increases the molecular/particles speed (kinetic energy. diffusion means movement of particles through the material.

generally, the heavier the particle the more it interacts with the environment and more the temperature matters. so higher temperature results in higher diffusion.

the answer for sodium is 0.186

the answer for rubidium is 0.251