Moles - Part 2

What is the percent by mass of sodium in NaCl?

What is the percent by mass of oxygen in MgO?

A compound is a hydrate when it...

How many moles are present in 32.3 grams of carbon dioxide (CO₂)?

What is the definition of molar mass?

How many moles are in 225g of CO?

C₂F₆

Choose the correct empirical formula...

What is the empirical formula for C₄H₆?

Glycerol has a molar mass of 92.09g/mol. Its percent composition is: 39.12% C, 8.75% H, and 51.12% O. What is the molecular formula for glycerol?

A formula with the lowest whole # ratio of elements in a compound is called

A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?

Determine the formula of CuSO₄·?H₂O hydrate given the following data:

Test Tube = 23.56 g

Test Tube + Hydrate = 26.06 g

Test Tube + Anhydrate = 25.16 g

A 15.67 g sample of a hydrate of magnesium carbonate was heated to drive off the water. The mass was reduced to 7.58 g. What is the formula of the hydrate?

A hydrate of magnesium chloride is present and the following data is collected:

mass of crucible = 22.130 grams

mass of crucible + hydrate = 25.290 grams

mass of crucible and contents after heating = 23.491 grams

What is the complete formula of this hydrate?