How many grams of chlorine gas, NO, are contained in 8.00 moles?
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Answer:
For on-line help with this topic, see the chemcal module "Stoichiometry" which deals with moles; balancing equations; stoichiometric calculations; molarity and solution stoichiometry.
MOLE CONCEPT (General Questions 1)
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1
Which of the following has the greatest mass:
(1.) copper (100 g),
(2.) helium (6.00 mole),
(3.) 12.0 x 1023 atoms of silver?
2 Hydrogen gas (4.00 g) and chlorine gas (10.0 g) are allowed to react.
(1.) Which reactant gas is in excess?
(2.) What mass of hydrogen chloride is formed?
3 (1.) Name the compound of formula Na2SO4.10H2O.
(2.) What is its molar weight?
(3.) What is the percentage by weight of sulfur in this compound?
(4.) How many sodium ions are in one mole of this compound?
4 Calculate the volume of the following at 298 K and 101 kPa.
(1.) Water (2.00 mol)
(2.) Chlorine (1.00 mol)
(3.) Mercury (3.00 mol)
(4.) Neon (1.00 mol)
(5.) Nitrogen (1.20 x 1024 molecules)
5 Calculate the mass of the following at 298 K and 760 mmHg pressure.
(1.) Helium (49.0 litre)
(2.) Water (3.00 mol)
(3.) Ethanol (100 cm3)
(4.) Nitrogen (25.0 litre)
6 The price of chromium is 1.00 dollar gram-1. What is the price of one mole of chromium?
7 Calculate (1.) the molar weight, and (2.) the molar volume of liquid carbon tetrachloride at 298 K given the density of carbon tetrachloride at 298 K = 1.584 g cm-3.
8 What volume is occupied at 298 K and 101 kPa by 1.00 mole of each of the following:
(1.) hydrogen(g)
(2.) helium(g)
(3.) aluminium(s)
(4.) water(l)
9 What amount (in mole) of carbon is contained in 112 g of ethylene (C2H4)?
10 Which of the following has the greatest mass?
(1.) lead (3.00 g)
(2.) helium (22.4 litre) at 273 K and 101 kPa?
(3.) 3.01 x 1023 atoms of lithium.
11 Which of the following has the greatest mass?
(1.) lead (63.0 g)
(2.) fluorine (24.5 litre) at 298 K and 2.00 atmosphere.
(3.) 3.01 x 1023 atoms of caesium.
12 In the chemical reaction requiring two atoms of aluminium for every three atoms of oxygen, how many mole of oxygen atoms is required by 2.7 g of aluminium? What mass of oxygen atoms are required?
13 Hydrogen gas reacts with chlorine gas to form hydrogen chloride. If hydrogen (2.00 mol) reacts with excess chlorine, what mass of hydrogen chloride can be obtained?
14 Nickel(II) sulfate-6-water (2.63 g) is converted to nickel(II) chloride-6-water. Calculate the theoretical yield in grams.
15 (1.) What mass of sodium hydroxide reacting with excess carbon dioxide is required to prepare 53.0 g of sodium carbonate?
(2.) What volume of carbon dioxide is released at 273 K and 1.00 atmosphere when this weight of sodium carbonate is treated with excess hydrochloric acid?
16 Calculate the mass of anhydrous sodium carbonate required to make 250 cm3 of 0.100 M solution.
17 A solution was prepared by dissolving nickel(II) nitrate-6-water (29.1 g) in some water and making the volume up to 1.000 litre with water. Assuming complete dissociation of the solid into ions, calculate the following for 100 cm3 of solution.
(1.) The number of mole of nickel(II) ion.
(2.) The number of mole of nitrate ion.
(3.) The number of individual nickel(II) ions.
(4.) The number of cm3 which theoretically contain one individual nickel (II) ion.