Question

How many molecules are in 5.00 grams of NH3?

a
b
0.294
1.77 x 1023
C 6.68 × 1022
e
d 0.333
2.00 × 1023

Answer 1

To calculate the number of molecules in 5.00 grams of NH3, we need to determine the number of moles of NH3 and then use Avogadro's number to convert moles to molecules.

Step-by-step explanation:

To calculate the number of molecules in a given amount of a substance, we need to use Avogadro's number (6.022 × 10^23). First, we need to determine the number of moles of NH3 in 5.00 grams. The molar mass of NH3 is 17.03 g/mol, so 5.00 grams of NH3 is equal to 0.294 moles (5.00 g / 17.03 g/mol).

Next, we can use the molar relationship between moles and molecules. One mole of NH3 contains 6.022 × 10^23 molecules. Therefore, 0.294 moles of NH3 will contain:

(0.294 moles) x (6.022 × 10^23 molecules/mole)

= 1.77 × 10^23 molecules.

Learn more about Calculating the number of molecules in a given amount of a substance