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9) a) Calculate the molarity of a solution made by dissolving 0.0715 mol Na2SO4 in enough water to form 650
mL of solution. b) How many moles of KMnO4 are present in 75.0 mL of a 0.0850 M solution? c) How many
millimeters of 11.6 M HCl solution are needed to obtain 0.105 mol of HCl?
mL of solution. b) How many moles of KMnO4 are present in 75.0 mL of a 0.0850 M solution? c) How many
millimeters of 11.6 M HCl solution are needed to obtain 0.105 mol of HCl?
How much unknown must be weighed to produce 0.7 grams of AgCl precipitate if the original sample is 35% chloride?
25fg to kg
23.8 fg to kg
6.0 g of cobalt(2) carbonate was added to 40 cm^3 of hydrochloric acid, concentration 2.0 mol/dm3.Calculate the maximum yield of cobalt(2) chloride-6-water and show that the cobalt(2) carbonate was in excess?
a sample hard water contains 4 ppm of ca2+.number of moles of co3 power 2- needed to remove hardness from 100 l of water will be
100g nitrogen mixed with 92g hydrogen
a) identity the limiting reagent
b) calculate the weight of amonia form
c) which reactent remains and how much
a) identity the limiting reagent
b) calculate the weight of amonia form
c) which reactent remains and how much
when is the mass of carbon dioxide that will be formed when 3.0 g of carbon is burned in 8.0 g of oxygen?
Propane, C3H8, is flammable and used in rural areas where natural gas is not available. What is the coefficient of oxygen in the balanced equation for the combustion of propane?
__C3H8(g) + __O2(g) __CO2(g) + __H2O(g)
__C3H8(g) + __O2(g) __CO2(g) + __H2O(g)
In an experiment, 0.520 g of chromium metal reacts with 3.807 g of iodine. Using the conservation of mass law, predict the mass of product.
2 Cr(s) + 3 I2(s) 2 CrI3(s)
2 Cr(s) + 3 I2(s) 2 CrI3(s)
