Question

N2 can react with H2 to form the compound N2H4 .

A sample of N2H4 has a mass of 25g . Identify the numerical quantity that is needed to convert the number of grams of N2H4 to the number of moles of N2H4 . (You do not need to do the actual calculation.)

Answer 1

Answer:

1 moles

You can view more details on each measurement unit: molecular weight of N2H4 or grams This compound is also known as Hydrazine. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles N2H4, or 32.04516 grams.

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Answer 2

The sample mass by the molecular mass is 0.78125 moles.

Explanation:

• It's asking for the numerical quantity.
• That quantity would be the molecular mass.
• Take the sample mass and divide it by the molecular mass to get the number of moles.

(14 N*2)+(1g H*4)

$=\frac{32g}{mol of N_{2} H_{4} }$

Divide the sample mass by the molecular mass

$=\frac{25g}{32g}$

$=0.78125 moles$

The  molecular mass in 0..78125 moles.