Impossible chemistry questions :(?

1. Which of the following is not an example of a model?


A. a floor lamp


B. a globe


C. a road map


D. a wind tunnel





2. A 1-g sample of the compound hydrogen chloride was analyzed and found to be 2.74 percent hydrogen and 97.3 percent chlorine. What percentage of hydrogen is present in a 2-g sample of hydrogen chloride?


A. 1.37%


B. 2.74%


C. 5.48%


D. 97.3%





3. The atomic number of an element whose atoms have 9 electrons and 1 neutrons is?


A. 9


B. 19


C. 1


D. 18





4.One isotope of carbon has 6 protons and 6 neutrons. The number of protons and neutrons of a second isotope of carbon would be?


A. 7 and 6


B. 6 and 7


C. 7 and 7


D. 6 and 6





5. If 9.0 g of water contain 1.0 g of hydrogen, what mass of oxygen is contained in 36 g of water?


A. 4.0 g


B. 8.0 g


C. 10.0


D. 32 g

Impossible chemistry questions :(?
1. Which of the following is not an example of a model?


A. a floor lamp





2. A 1-g sample of the compound hydrogen chloride was analyzed and found to be 2.74 percent hydrogen and 97.3 percent chlorine. What percentage of hydrogen is present in a 2-g sample of hydrogen chloride?


B. 2.74%





3. The atomic number of an element whose atoms have 9 electrons and 1 neutrons is?


A. 9





4.One isotope of carbon has 6 protons and 6 neutrons. The number of protons and neutrons of a second isotope of carbon would be?


B. 6 and 7


or


D. 6 and 6





5. If 9.0 g of water contain 1.0 g of hydrogen, what mass of oxygen is contained in 36 g of water?


D. 32 g
Reply:1. A. A floor lamp does not allow you to imagine characteristics of a system


2. B.


3. You have to assume it is electronically neutral, then: A.


4. A.


5. A.