Answer to Question #198492 in Mechanical Engineering for ARCHIE MEDINA

Question

1. Determine the number of atoms in 1.75 mol Al

2. Calculate the number of formula units in 25.0 mol NaNO3

3. Given 6.25 mol H O2 determine the number of molecules.

DIRECTIONS: A. How many atoms are in each of the following samples? .

11.3 .44.2 a g Pb

b g Mg

B. Calculate the mass in grams of each of the following samples. 18 21 4 .

1.50x10 .8.35x10 a atoms Ne

b molecules CH 1. What is the percent composition of the following compounds?

0 8 12 22 11 2 4 3 . ( ) . ( ) . min ( ( )

a Naphtalene C H

b Sucrose C H O

c.Alu um sulfate Al SO

Answer 1

1:

1.054×10²⁴ atoms

2:

2120g

3:

3.76×10²⁴ atoms