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1. How many grams of methanol (CH3OH) are produced when 5.00 kg of H2 reacts with excess carbon monoxide?

CO + 2H2 → CH3OH


2. What is the molecular weight of PCl3?


a. 66.5 amu


b. 106.5 amu


c. 137.5 amu


d. 180 amu


e. 360 amu


3. How many moles carbon atoms are in 5 moles of ethanol, CH3CH2OH?


a. 2.5 mole


b. 5 moles


c. 10 moles


d. 30 moles


e. 120 moles


4. The elements of group IA will all form ions. These ions will be ______ and will have a charge of ___.


a. cations, 2+


b. anions, 2 −


c. cations, 3+


d. anions, 1 −


e. cations, 1+


5. The elements of group VIIA will all form ions. These ions will be _____ and will have a charge of __.


a. cations, 2+


b. anions, 2 −


c. cations, 3+


d. anions, 1 −


e. cations, 1+


6. A substance composed of two or more different elements in fixed proportions is known as a(n) _________ .


a. Atom


b. element


c. molecule


d. Ion


e. compound


7. Which of these statements best explains the Law of Conservation of Mass?


a. All atoms of a given element have the same weight.


b. Atoms of different elements combine in fixed whole number ratios.


c. The weight of an object is neither created nor destroyed in a chemical reaction.


d. All samples of a given compound have the same proportion of constituent elements.


e. The sum of the masses of the reactants equals the sum of the masses of the products in a normal chemical reaction.


8. Based on Rutherford's model of the atom, how many protons would be found in an atom with 17 electrons?


a. 1


b. 7


c. 12


d. 17


e. 34


9. Analysis of a potassium iodide (KI) sample indicated that it contained 39.1 g of potassium and 126.9 g of iodine. Determine the mass of iodine in a sample of KI if the mass of potassium is 85.0 g.


a. 124.1 g


b. 165.0 g


c. 211.9 g


d. 275.g


e. 360.9 g


10. Which of the following statements does not describe a chemical compound?


a. It contains two or more elements.


b. It is a pure substance.


c. It has a fixed composition.


d. It has a variable composition.


e. All of the statements are correct.

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Subject: Chemistry, Science
1. How many grams of methanol (CH3OH) are produced when 5.00 kg of H2reacts with excess carbon monoxide? CO + 2H2 CH3OH 2. What is the molecular
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