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3 years ago

Q #13 How many moles of MgCl2 are there in 350. g of compound?

Chemistry

1 answer:

Vaselesa [24]3 years ago

8 0

Answer:

3.67 moles

Step-by-step explanation:

We need to find out the number of $MgCl_2$ moles present in 350 grams of a compound.

Molar mass of $Mg$ = 24.305

Molar mass of $Cl_2$ = 35.453

So, one mole of $MgCl_2$ = 24.305 + (35.453 * 2) = 95.211g

1 Mole in 1 molecule of $MgCl_2$ = $\frac{1}{95.211} = 0.0105$

Therefore, number of moles in 350 grams of compound = 0.0105 * 350

= 3.67 moles

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2 years ago

A certain second-order reaction (B→products) has a rate constant of 1.30×10−3 M−1⋅s−1 at 27 ∘C and an initial half-life of 224 s

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Answer:

$\large\boxed{\large\boxed{0.291M}}$

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By definition one half-life is the time to reduce the initial concentration to half.

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3 years ago