Question

How many molecules of carbon tetrafluoride, CF4, are in 176 grams of CF4?

Answer 1

Answer:

1.2*10^24 molecules of CF4

Explanation:

the molar mass of cf4 is 88.0043 g/mol

176/88.0043 = 2 moles of CF4

Then multiply by avogadro's number (6.022*10^23) to get the number of molecules

2*6.022*10^23 = 1.2*10^24 molecules of CF4

Answer 2

There are 1.204 × 10²⁴ molecules of carbon tetrafluoride in 176 grams of CF4.

HOW TO CALCULATE NUMBER OF MOLECULES:

• The number of molecules in a substance can be calculated by multiplying the number of moles in the substance by Avogadro's number:

• no. of molecules = no. of moles × 6.02 × 10²³

• The number of moles in CF4 can be calculated as follows:

• moles of CF4 = mass of CF4 ÷ molar mass of CF4.

• Molar mass of CF4 = 12 + 19(4)

• Molar mass of CF4 = 88g/mol

• moles of CF4 = 176g ÷ 88g/mol

• moles of CF4 = 2mol

• No. of molecules = 2 × 6.02 × 10²³

• no. of molecules = 12.04 × 10²³

• no. of molecules = 1.204 × 10²⁴

• Therefore, there are 1.204 × 10²⁴ molecules of carbon tetrafluoride in 176 grams of CF4.

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