Definitions and more
Molar Mass
moles to grams
Miscellaneous conversions and more
Significant figures
100

Ions that remain unchanged on both sides of a chemical reaction.

What are Spectator Ions?

100

Molar mass of C

What is 12.01 g/mol

100

number grams of carbon in 10 moles

what is 120.1 g or 120. g of C

100

Percent composition of ammonia (NH3)

What is...

% N = 82.24

%H = 17.76

100

The meaning of being significant as a number

What is measured
200

unit for molar mass

What is grams per mole (g/mol)

200

Molar mass of H2O

What is 18.02 g/mol

200

Number of grams in 88.1 moles of magnesium

What is 2141.7 or 2140 grams rounded to 3 SF

200

23 km into micrometers

2.3x10^10 micrometers

200

Number of significant figures in 1,230.00

What is 6

300

The number of "things" in a mole

What is 6.022 x 1023

300

Molar mass of H3PO4

What is 98.00 g/mol

300

number of grams in 2 moles of oxygen

What is 32.0 g

300

Number of atoms in 840.90 amu of Fe

15 atoms of Fe

300

234,056 rounded to 2 significant figures

What is 230,000 or 2.3 x 10^5 

400

Give the correct net ionic equation for the balanced molecular equation: Ag2SO4 + 2NaCl = 2AgCl + Na2SO4

Ag+ (aq)   +    Cl- (aq)  = AgCl (s)

400

Molar mass of HCO3

What is 61.02 g/mol

400

Number of grams in 4.5 moles of NaF

What is 189 g of NaF

400

Number of amu in 1.2x10^5 atoms of Sodium

2.76 x 10^6 amu of Na

400

0.00890 + 1.250

1.259

500

Name SnO2

Tin (IV) oxide

500

Molar mass of MnO4

What is 118.94 g/mol

500

Molar mass of Ca(OH)2 

74.10 g/mol

500

Number of moles in 4.5x10^25 amu of Lithium

10.77 moles of Li

500

( 2.912 - 1.20 ) / 7.5

What is 0.23