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## PHYSICS Question 16 of 50 1 poin Each water molecule has a mass of roughly 3.0 10^26 kg. How many water molecules are th

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PHYSICS

Question 16 of 50

1 poin

Each water molecule has a mass of roughly 3.0 10^26 kg. How many water

molecules are there in a glass of water (250 ml)? [Note: 1 ml = 1 cm^3, and

the density of water is 1.00 g/cm^3.] (CLO2, C4)(N2)

a) 8.3 X 10^22 molecules

b) 8.3 x 1023 molecules

c) 8.3 x 10^24 molecules

d) 8.3 x 10^21 molecules

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2021-08-15T03:07:00+00:00
2021-08-15T03:07:00+00:00 1 Answers
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## Answers ( )

Answer:c) 8.3 x 10^24 molecules

Explanation:First of all, we convert the volume of the glass of water from mL to :

The relationship between mass and volume is:

where

is the density of water

M is the total mass of the glass of water

is the volume of the water in the glass

Solving for M,

Now we know that the mass of a single molecule of water is

The total mass of the water in the glass can be written as

where

N is the number of molecules in the glass of water

Solving for N, we find: