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2 years ago

Which formula represents the compound commonly known as phosphine?

Chemistry

2 answers:

Damm [24]2 years ago

4 0

Answer:

The answer is: C) ph3.

Explanation:

Phosphine (PH3) is a colorless gas at room temperature and very toxic. It is odorless when in a pure state in concentrations of up to 282 mg / m3 (200 ppm). Phosphine is poorly soluble in water, being soluble at 2.5 - 15% v / v in most organic solvents at room temperature.

The answer is: C) ph3.

sineoko [7]2 years ago

3 0

Your answer should be c ph3

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$\text{Moles of calcium oxalate}=\frac{0.429g}{128.1g/mol}=0.0033mol$

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1 mole of calcium oxalate is produced from 1 mole of calcium ion

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$\text{Mass percent of calcium ions}=\frac{\text{Mass of calcium ions}}{\text{Mass of milk}}\times 100$

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$\text{Mass percent of calcium ions}=\frac{0.132g}{125g}\times 100=0.107\%$

Hence, the mass percent of calcium in milk is 0.107 %

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