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3 years ago

5

The balance reads 221.5 _ and is measuring an object's _____. grams; mass Newton's; mass kilograms; mass Newton'

s; weight

1 answer:

azamat3 years ago

5 0

Answer: grams;mass

Explanation: :) I took the test.

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How many moles are in 1.2x10^3 grams of ammonia(NH3) ?

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Answer : The number of moles present in ammonia is, 70.459 moles.

Solution : Given,

Mass of ammonia = $1.2\times 10^3g$

Molar mass of ammonia = 17.031 g/mole

Formula used :

$\text{Moles of }NH_3=\frac{\text{ given mass of }NH_3}{\text{ molar mass of }NH_3}$

$\text{Moles of }NH_3=\frac{1.2\times 10^3g}{17.031g/mole}=70.459moles$

Therefore, the number of moles present in ammonia is, 70.459 moles.

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Yuki888 [10]

Answer:

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