Question

# 1)How many moles of N are in 0.237 g of N2O? 2)What is the average mass...

1)How many moles of N are in 0.237 g of N2O?

2)What is the average mass of a single phosphorus atom in grams?

3)A compound is 54.53% C, 9.15% H, and 36.32% O by mass. What is its empirical formula?

4)The molecular mass of the compound is 132 amu. What is the molecular formula?

1)

Mass of is Molar mass of is There are 2 moles of Nitrogen ( ) in every mole of Number of moles of is Number of moles of in the given amount of is 2)

One mole of phosphrous weighs - 30.974 g

one mole is = 6.023x 1023 atoms

Average mass of single phosphrous atom is 3)

Molar mass of Hydrogen ( ) Molar mass of Carbon ( ) Molar mass of Oxygen ( ) Let the empirical formula be Let the molar mass of substance be percentages of elements by mass are

For Carbon ----------- (1)

For Hydrogen ---------- (2)

For Oxygen ---------- (3)

Dividing the equations (1) and (2) that is Dividing the equations (2) and (3) that is Hence empirical formula is 4)

Molecular mass of compound is Hence and Molecular formula is #### Earn Coins

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