Question

Question 37

1. What mass of H2O is produced by the combustion of 1.00 mol of CH4? CH4(g) + 2O2(g) → CO2(g) + 2H2O(ℓ)

   	A.	44 g H2O
   	B.	36 g H2O
   	C.	18 g H2O
   	D.	None of the above.

Question 35

1. Which of the following forms a ionic bond ?

   	A.	K-Cl
   	B.	Br-Br
   	C.	N-H
   	D.	B and C

Question 32

1. In the following nuclear equation which radioisotope is formed during beta decay of Molybdenum-99. (Fill in the blank __________ )

   99

          Mo          ------------->        ___________   +    ⁰ e-1

   42                         

   	A.	99 Tc 43
   	B.	1 n 0
   	C.	4 He                                                                        2
   	D.	None of the above.

Question 31

1. Which of the following describes a fusion reaction?

   I Bombardment of a large nucleus breaks it apart, releasing large amounts of     energy and a neutron.

   II Two nuclei combine to form a larger nuclei, releasing a large amount of energy.

   III A larger nucleus breaks up and produces two smaller isotopes.

           IV One neutron bombards a nucleus, which breaks it up releasing 3 more neutrons.

   	A.	I
   	B.	II
   	C.	III
   	D.	IV

Question 30

1. what is the molar mass of  Na2SO_{4 ?}

   	A.	142 g / mol
   	B.	310 g / mol
   	C.	71 g / mol
   	D.	119 g / mol

Question 29

1. Use Avogadro’s number to determine the number of molecules in 1.50 moles of water(H2O)

   	A.	9.0 × 1023 molecules
   	B.	1.50 × 1024 molecules
   	C.	1.8 × 1023 molecules
   	D.	9.03 × 1023 molecules

Answer 1