Question

calculate mass of oxygen present in 250 g sample of water

​

Answer 1

Answer:

There are

2

×

250

⋅

g

18.01

⋅

g

⋅

m

o

l

−

1

×

6.022

×

10

23

⋅

m

o

l

−

1

=

...

.

Explanation:

2

×

250

⋅

g

18.01

⋅

g

⋅

m

o

l

−

1

×

6.022

×

10

23

⋅

m

o

l

−

1

=

1.67

×

10

25

⋅

H atoms

and HALF this number of

oxygen atoms

Explanation:

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