Its pretty easy, correct answer is D
Answer:
Explanation:
See attached table.
Note that:
1 mole = 6.02x10^23
Molar mass is grams/mole. For the elements, the atomic mass is the same number as molar mass, just expressed as grams/mole.
C) Extensive Property
An extensive property is a property that depends on the amount of matter in a sample. The mass of an object is a measure of the amount of matter that an object contains.
Do you know what is meant by needed? does it mean lone pairs?
Answer:
12.01
Explanation:
(12.00*98.93% + 13*1.07%) /100% = 12.01