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100
This is a unit of measurement used in chemistry to express amounts of a chemical substance, defined as the amount of any substance that contains as many particles as there are atoms in 12 grams of carbon-12 isotope.
What is mole?
100
This is how many atoms are present in 3 moles of Carbon.
What is 1.806 x 10^24 atoms of Carbon?
100
What is the percentage of oxygen in water?
What is 88.8% O?
100
This is the empirical formula of a compound composed of 39.3% sodium and 60.7% chlorine.
What is NaCl?
200

These are ionic compounds containing water molecules combined in a definite ratio as an integral part of the crystalline structure.

What is a hydrate?

200
This is the mass of 2.58 moles of copper (II) chloride.
What is 346 g CuCl2?
200
This is the percentage of sulfur in magnesium sulfide.
What is 56.8% S?
200

This is the empirical formula of a compound that consists of 76.5% carbon, 12.2% hydrogen, and 11.3% oxygen.

What is C9H17O?

200

In the formula MgCl2 * 3H2O. The MgCl2 is known as the _____________.

anhydrate

300
This is the chemical formula of ammonium perchlorate.
What is NH₄ClO₄?
300
This is the number of particles that are present in 87.9 g of nickel (II) bromide?
What is 2.42 x 10^23 particles NiBr2?
300

This is the chemical formula for lead (IV) acetate.

What is Pb(C₂H₃O₂)₄?

300

This is the molecular formula of CH2O if the molar mass is 120.1g/mol.

What is C4H8O4?

300

What is the name of 6.02 x 1023 and what does it represent

Avogadro's # and the number of particles in a mole

400
This is the chemical formula of iron (III) nitrate.
What is Fe(NO₃)₃?
400

How many atoms of C are in 80 grams of C4H6

3.56 x 1024

400

What are the percentages of carbon, hydrogen, and oxygen in glucose (C6H12O6).

What is 40% C, 6.7% H, and 53.3% O?

400

What is the empirical formula of estriol which has a molecular formula C18H24O3.

What is C6H8O?

400

How many total atoms are in 4 moles of CaBr2

7.22 x 1024

500

This is the percent composition of phosphate in iron (III) phosphate.

What is 62.97% PO4?

500
This is the mass of 1.987 x 10^24 particles of mercury (II) sulfide.
What is 767.7 g HgS?
500
This is the percentage of sodium in sodium acetate.
What is 28% Na?
500

What is the Empirical formula of a compound that contains  75.42% carbon, 6.63% hydrogen, 8.38% nitrogen, 9.12% oxygen 

What is C22H23N2O2?

500

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?

MgCO3 * 5 H2O