What is the percentage by mass of copper in copper in copper (l) oxide (CU2O)? [O = 16; CU =64]
88.9%
80.0%
66.7%
20.0%
11.1%
Correct answer is A
No explanation has been provided for this answer.
Which of the following cannot be deduced from the electronic configuration of a transition metal?
Possession of magnetic property
Ability to form complex ions
Position in the Periodic Table
Variable oxidation states
Physical properties of the metal
Correct answer is A
No explanation has been provided for this answer.
Which of the following molecules is linear in shape?
CH4
H2O
NH3
H2S
CI2
Correct answer is E
No explanation has been provided for this answer.
If a solid has a low melting point and dissolves readily in benzene, it would probably
contain strong electrostatic forces of attraction
conduct electricity in the molten state
dissolve in water
have covalent bonding
absorb moisture on exposure to air
Correct answer is D
No explanation has been provided for this answer.
What is the molar mass of an alkyne with the formula Cx H 14? (H = 1, C = 12)
86g
92g
98g
110g
112g
Correct answer is D
No explanation has been provided for this answer.