The complete combustion of acetylene produced 13.0 kg of water.
Calculate the number of moles of acetylene reacted.
Calculate the mass of oxygen reacted.
Oxygen and mercury were produced by thermally decomposing 3.95 g of mercury(II) oxide.
Calculate the number of moles of mercury(II) oxide reacted.
Calculate the mass of oxygen gas produced.
How many moles of atoms are there in 12 g of carbon-12?
How is the atomic mass unit (u) defined?
1,2-Dibromoethane () was produced by reacting 12.85 g of ethane with an excess of bromine.
Calculate the number of moles of 1,2-dibromoethane produced, to 3 significant figures.
Calculate the mass of bromine reacted.
Calcium hydroxide and ammonium sulfate react to form ammonia, calcium sulfate, and water as the only products. Calculate to 2 significant figures the number of molecules of ammonia produced if 529 g of ammonium sulfate reacts with 385 g of calcium hydroxide.
A prospector panning for gold in a river collects 15.81 g of pure gold. Calculate to 3 significant figures the number of atoms in this quantity of gold.
To 3 significant figures, how many atomic mass units (u) are there in one gram (g) of a substance?
Diamond is one form of elemental carbon. An engagement ring contains a diamond weighing 1.5 carats (1 carat = 200 mg). How many atoms are present in the diamond?
Vitamin C is a covalent compound with the molecular formula . The recommended daily dietary allowance of vitamin C for children aged 4–8 years is mol. What is the mass of this allowance in grams?
The approximate daily dietary requirement of the amino acid leucine, , is 15 mg/kg of body weight. For a 65 kg person, what is this requirement in moles?
A sample of magnesium required 5.00 g of hydrogen chloride gas to completely react.
Calculate the number of moles of magnesium reacted.
Calculate the mass of magnesium chloride produced.
A 65-kg woman has mol of hemoglobin (molar mass = g/mol) in her blood.
How many hemoglobin molecules is this?
What is this quantity in grams?
Gallium chloride is formed from excess gallium using 2.60 L of 1.44 M hydrochloric acid.
Calculate the number of moles of gallium reacted.
Calculate the mass of gallium chloride formed.
A sample of ethene reacted with water to produce 9.55 g of ethanol.
Calculate the number of moles of ethene reacted.
Calculate the mass of water reacted.
To 3 significant figures, how many molecules of water are produced by the complete combustion of 33.08 g of propane?
Thermal decomposition of a sample of magnesium carbonate produced 283 g of carbon dioxide.
Calculate the number of moles of magnesium oxide produced.
Calculate the mass of magnesium carbonate reacted.
The complete combustion of butane produced 15.0 kg of carbon dioxide.
Calculate the number of moles of oxygen reacted.
Calculate the mass of butane reacted.
Sodium chloride was produced by reacting 5.50 g of sodium metal with chlorine.
Calculate the number of moles of sodium chloride produced.
Calculate the mass of chlorine reacted.