Question

please answer the question with explanation please​

Answer 1

Answer:

sis!!!I'll answer pls just rewrite this so I can see clearly..pls

Answer 2

Answer:

6400u or 6400g

Explanation:

1 mole = 6.022×10²³ molecules

x moles = 12.044×10²⁵ molecules

By cross multiplying,

12.044×10²⁵×1 mole

x= ----------------------------

6.022×10²³

x= 2×10²⁵/10²³

2×(10²³)(10²)

x= ------------------

10²³

x= 2× 10²

x=200

Hence, 200 moles are there.

No. of moles = mass/molar mass

200 = mass / molar mass of O2

200 = mass / 32

200×32 = mass

Mass = 6400g or 6400u

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Hope it's helpful