can someone tell me if my answers are correct? or help me with the ones that are wrong?

Question

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. 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

Answer 1

All correct.

Answer 2

They are all correct except for question 3, which is impossible. No element could have 9 electrons and only 1 neutron.