Deck 5 (81 - 100)

Question 1

81. A bond between metal and non-metal is generally:

a. hydrogen
b. metallic
c. ionic
d. covalent

Answer 1

c. ionic

Question 2

82. Vinegar tastes sour because of ?

Answer 2

ethanoic acid

Question 3

83. How many nitrogen atoms are in 28g of nitrogen molecule?
    Ar(N) = 14

Answer 3

12.044 x 10*23

Question 4

84. The products of the reaction between methanol and ethanoic acid are ?

Answer 4

methyl ethanoate and water

Question 5

85. How many atoms are in 3.50 mol of calcium?

Answer 5

2.10 x 10*24

Question 6

86. Give the name to:

H3C-CH2-CH2-CH2-COOH

Answer 6

pentanoic acid

Question 7

87. What is the molar concentration of a 100.00 ml aqueous solution that contains 1.00 g KCl?
    Mm(KCl) = 74.55 g.mol-1

a. 1.34 mol.dm-3
b. 0.134 mol.dm-3
c. 0.0134 mol.dm-3
d. 0.00134 mol.dm-3

Answer 7

b. 0.134 mol.dm-3

Question 8

88. What is the only metal that is in liquid form at room temperature ?

Answer 8

mercury

Question 9

89. The atom has atomic number 17 and a mass number 37. How many neutrons does the atom contain?

Answer 9

20
(37 - 17)

Question 10

90. In the reaction represented by the following equation a conjugate acid-base pair is:

HF(aq) + H2O(l) <-> H3O+(aq) + F-(aq)

a. F- and H2O
b. HF and F-
c. H3O+ and HF
d. HF and H2O

Answer 10

b. HF and F-

Question 11

91. An anion is a —– charged ion

Answer 11

negatively

Question 12

92. What are the products of the decomposition of mercury(II) oxide ?

Answer 12

Hg and O2

Question 13

93. Acids have a pH level below 7. True or false?

Answer 13

true

Question 14

94. Give the name to:

H3C-CH2-COOH

Answer 14

propionic acid

Question 15

95. A strong base in an aqueous solution:

a. is a weak electrolyte
b. produces many H+ ions
c. will not dissolve
d. completely dissociates into ions

Answer 15

d. completely dissociates into ions

Question 16

96. When 3 fatty acids are bonded to a glycerol backbone through ester bonds, a ——– is formed:

a. steroid
b. fatty acid
c. triglyceride
d. wax

Answer 16

c. triglyceride

Question 17

97. The electron configuration for the element 5X is:

a. 1s2, 2p3
b. 1s5
c. 1s2, 2s2, 2p1
d. 1s2, 2s1, 2p2

Answer 17

c. 1s2, 2s2, 2p1

Question 18

98. What is the chemical formula for sodium carbonate ?

Answer 18

Na2CO3

Question 19

99. PIC

Question 20

100. In ionic bonds, valence electrons are:

a. transferred
b. destroyed
c. unequally shared
d. equally shared

Answer 20

a. transferred