A mole
What represents 6.02x1023 units of a substance?
The number of moles in 98.5 g of gold.
What is 0.5 moles of Au?
What is 70% Fe by mass and 30% O by mass?
The empirical formula of unknown compound is found to have a percent composition of 47% potassium, 14.5% carbon, and 38.5% oxygen
What is KCO2
The molecular formula of a compound with an empirical formula of C4H4O, and a molar mass of 136 g/mol.
What is C8H8O2?
Molar Mass
What is the mass, in grams, of 1 mole of a substance?
The mass of 6.39 moles of table salt, NaCl.
What is 0.11 g of NaCl?
3.4 moles of carbon react with 6.8 moles of oxygen
What is 27% carbon and 73% oxygen?
The empirical formula a compound that contains 15.8% carbon and 84.2% sulfur.
CS2
The molecular formula of a compound that is 9.4 % carbon, 14.9 % fluorine, 62.7% bromine, and 6.3% oxygen that has a formula mass of 237.8 g/mol.
What is C2F2Br2O
Avogadro's number
What is 6.02x1023
How many particles there are in 150 g of CaCO3
What is 9.02 x 1023 particles of CaCO3?
The percent composition by mass for each element in hydrogen peroxide, H2O2
What is 94% oxygen and 6% hydrogen?
The empirical formula for a substance containing 209.56 g C, 16.9 g H, and 617.695 g Cl
CHCl
The molecular formula for NutraSweet, a synthetic sweetener that contains 57.14% carbon, 6.16% hydrogen, 9.52% nitrogen, and 27.18% oxygen. NutraSweet has a molecular formula mass of 294.30 g/mol.
C14H18N2O5
Empirical Formula
What is the smallest whole-number ratio of elements in a compound?
What is 8.84 x 1023 molecules NH3?
The percent composition by mass for each element in asprin, C9H8O4
What is 60% carbon, 4.5% hydrogen, and 35.5% oxygen?
What is C4H5ON2?
The molecular formula of Caffeine. A sample contains 49.47% carbon, 5.201% hydrogen, 28.84% nitrogen, and 16.48% Oxygen, and has a molecular formula mass 194.2 g/mol
What is C8H10N4O2?
Molecular Formula
What is the exact formula of a compound, giving the types of atoms and the total number of each?
How many grams there are in 4.3 moles of Na(NO3)2
What is 632.09 g of Na(NO3)2?
The percent composition of hydrogen in ammonium sulfate, (NH4)2SO4
What is 6.1% hydrogen?
The empirical formula of benzoic acid, a compound that contains 68.8% carbon, 4.95% hydrogen, and 26.25% oxygen.
C7H6O2
The molecular formula of Nicotine. Nicotine is the main addictive ingredient in cigarettes. A typical cigarette contains 12.33 mg carbon, 1.45 mg H, and 2.87 mg N. The molar mass of nicotine is 162 g/mol
C10H14N2