Molar Mass
What is the molar mass of an element? How do we determine it?
Molar mass is the mass of one mole of a substance in grams. We calculate it by referencing the periodic table and if there are more than one element in a compound, we add them together. The units are g/mol
Calculate the number of NO2 molecules in 4 moles of a pure sample of NO2 molecules.
. 24.088 × 1023
What percentage by mass of hydrogen is in water?
11.1%
What is are the conditions of a gas at stp?
0 degrees Celcius and 1 atm
What is the atomic mass of Oxygen?
16
What is the molar mass of BF3?
68 g/mol
Find the number of moles of NO2 molecules in a sample containing 3.011 × 1023 molecules of NO2.
0.5 moles
What percentage by mass of potassium is in KMnO4?
34.8%
What volume is occupied by 15 mol of carbon dioxide gas at stp?
336 dm3
What is the atomic mass of Carbon?
12
What is the molar mass of Mg(OH)2?
58 g/mol
How many O-atoms are present in 3/8 millimoles of [Co(H2O)4Cl2]Cl
9.033 × 1020
What percentage by mass of carbon is in CH3COCH3?
62.1%
What is the volume of 0.003 mol of ammonia gas at rtp?
0.072 dm3
What is the atomic mass of Silicon?
28
What is the molar mass of H3PO4?
98 g/mol
Find the mass in grams of 2.00 x 1023 molecules of F2.
12.7 g
What is the percentage composition of oxygen in the air (nitrogen, oxygen, carbon dioxide and hydrogen) if the mixture is composed of 1 mol of each gas?
30.2%
What volume is occupied by 4.35 x 1021 molecules of oxygen gas at rtp?
What is the atomic mass of Magnesium?
24
What is the molar mass of Ga2(SO3)3?
380 g/mol
How many molecules are in 10 g of aspartame (C14H18N2O5)?
2.04 x 1022 molecules
What is the percentage composition by mass of 0.038 mol of iron (II) in an iron salt that has a mass of 28.7 g?
7.4%
What is the volume of 0.056 kg of steam at stp?
69.7 dm3
What is the atomic mass of Chlorine?
35.5