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QUIZ
1. 7,6 grams mixture of formic acid and acetic acid was neutralized by 35 ml of 20% potassium
hydroxide solution (density=1,20g/ml). Calculate mass percentage of acetic acid in the mixture.
2. Find molecular formula of an alkene, if 1120 ml of hydrogen chloride at STP can be reacted with
2,8 grams of an alkene.
3. Write reactions according to the following scheme:
QUIZ
1. Combustion of 4,5 grams of primary amine gives 1,12 liters of nitrogen. What is the molecular
formula of amine?
2. Write reactions according to the following scheme
3. Calculate mass of salt produced by the reaction of 9,4 grams of phenol with 50 grams of 12%
sodium hydroxide solution.
QUIZ
1. As a result of combustion of 22,5 grams of α –aminoacid 13, 44 liters of carbon dioxide and 3,36
liters of nitrogen at STP were produced. What is the molecular formula of an aminoacid?
2. Write reactions according to the following scheme
3. Calculate mass of chloromethane produced by the reaction of 8 liters of methane with 10 liters of
chlorine at STP.
QUIZ
1. Write reactions according to the following scheme:
2. As a result of combustion of 0,9 grams of an organic compound 672 ml of carbon dioxide at STP and
0,54 ml of water were produced. Molecular mass of a compound is 180 g/mol. What is the molecular
formula of a compound?
3. Calcium carbide was reacted with excess amount of water to produce 4,48 liters of gas at STP.
Calculate the volume of 20% hydrochloric acid solution (density 1,10g/ml) required for neutralization
of base produced by the reaction.
QUIZ
1. Write reactions according to the following scheme
2. 7,4grams of an organic compound was burned. 6,72 liters of carbon dioxide at STP and 5,4 ml of
water were produced. What is the molecular formula of a compound?
3. 27,2 grams of mixture of calcium carbide and aluminum carbide was reacted with hydrochloric acid,
as a result 11,2 liters of gas mixture was produced. Calculate mass percentage of acetylene in the
mixture?
QUIZ
1. Write reactions according to the following scheme
2. 16,1 grams of monocarboxylic acid was reacted with ethanol at the presence of sulfuric acid. 25,9
grams of compound was produced. What is the molecular formula of an acid?
3. A monocarboxylic acid contains 55,8% carbon, 7% hydrogen, 37,2% oxygen. What is the molecular
formula of compound? Write isomers of this compound and name them.
QUIZ
1. Write reactions according to the following scheme
2. Monocarboxylic acid was reacted with 3,2 ml of methanol (density 0,8g/ml), as a result 8,16 grams of
an organic compound was produced. What is the molecular formula of a compound?
3. What is the molecular formula of the aldehyde that contains 69,77% carbon, 11,63% hydrogen,
18,60% oxygen by mass? Write its isomers and name them.
QUIZ
1. Write reactions according to the following scheme:
2. Combustion of a hydrocarbon gives 27 grams of water and 33,6 liters of carbon dioxide at STP.
Density of a hydrocarbon by argon is 1,05. What is the molecular formula of a hydrocarbon?
3. What is the molecular formula of a cycloalkane, if 1 gram of a cycloalkane can add 400 ml of
chlorine at STP?