Which of the following statements is true about one formula unit of Cu(OH)2? a) It is composed of one Cu(OH)2 molecule.

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Which of the following statements is true about one formula unit of Cu(OH)2? a) It is composed of one Cu(OH)2 molecule. Ob) It is composed of one Cu atom and one (OH), molecule. c) It is composed of one Cu2+ ion and two OH-ions. d) It is composed of one Cu2+ ion and one (OH)22-ion. e) It is composed of one Cu atom and two OH molecules.
What is the mass of oxygen atoms in 0.295 mol Fe(CO)s? a) 17.78 b) 4.728 C) 23.6 8 Od) d) 57.88 e) 16.58
In 0.308 mol of trimellitic acid, C6H3(COOH)3, there are a) 1.85 x 1022 molecules. Х 1 - b) 1.67 x 1024 carbon atoms. c) 3.09 x 1023 hydrogen atoms. d) 7.42 x 1024 molecules. х e) 5.56 x 1023 oxygen atoms.
a At 433.7 mmHg and 20.2°C, a 1.54-L sample of a hydrocarbon gas has a mass of 1.61 g. What is the formula of the gas? a) CzH6 b) CH4 c) CzHg d) C2H2 e) C2H6