Mole Concept

Front

What is the molar mass of NaCl?

Back

58.45g/mol

Front

Calculate the % composition by mass of oxygen present in H₂SO₄.

Back

65.25%

Front

How many moles are 98.3 grams of aluminum hydroxide, Al(OH)₃?

Back

1.26 moles

Front

A compound consists of 72.2% magnesium (Mg) and 27.8% nitrogen (N) by mass. What is the empirical formula? Options: Mg₄N₃, MgN₂, Mg₃N₂ , MgN

Back

Mg₃N₂ 

Front

Convert 25 g of NaBr to molecules

Back

1.45x10²³ molecules

Front

Empirical formula for compound C_xH_yO_z with ratio C:H:O = 2:2.5:1?

Back

C₄H₅O₂

Front

Empirical formula: C₂H₇O, Molar mass: 141 g/mol. Determine the molecular formula.

Back

C₆H₂₁O₃

Front

Calculate the percentage of composition by mass of oxygen in Al(HCO₃)₃.

Back

68.57 %

Front

Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.

Back

Na₃PO₄

Front

True statements about the formula of dinitrogen monoxide, N₂O: The relative molecular mass is 28., One molecule of N₂O consists of one nitrogen atom and one oxygen atom., One mole of N₂O contains 6.02 x 10²³ atoms of nitrogen., One mole of N₂O consists of two mole of nitrogen atom and one mole of oxygen atom.

Back

One mole of N₂O consists of two mole of nitrogen atom and one mole of oxygen atom.