Question

*Show work for the following examples*
1) What is the mass of 1 mole of H2O2 (Hydrogen peroxide)?
2) Calculate the mass of 1 mole of NaNO3 (Sodium nitrate)?
3) How many atoms are in 8.0 moles of Argon?
8.0 mol Ar * ( \ ) = atoms of Ar
4) How many moles of Kr are in 132g of Krypton?
132 g Kr * ( \ ) = moles of Kr
*Next are 2 step equations*
5)How many atoms are in 96.4 g of Si?
94.6 g Si * ( \ ) * ( \ ) = atoms of Silicon
6) What is the mass in grams of 4.8 * 10^24 atoms of Magnesium?
I got most of this one but I'm not sure what the next step is :
4.8 *10^24 atoms of Mg * (1\(6.022 * 10^23)) * (24\1) = 191 g Mg

Answer 1

1) (1.00mol H2O2)(34.02g/mol H2O2) = 34.02g H2O2

2) (1.00mol NaNO3)(84.99g/mol NaNO3) = 84.99g NaNO3

3) (8.00mol Ar)(6.02x10²³) = 4.82x10²⁴ atoms

4) (132g Kr) / (83.79g/mol Kr) = 1.58mol Kr

5) (96.4g Si)/(28.09 g/mol Si) = 3.43mol Si
(3.43mol Si)(6.02x10²³) = 2.07x10²⁴ atoms Si

6) You did this one correctly :)