3 years ago

If 45.6 g of Fe2O3 reacts with excess water, how much heat is required?

Chemistry

2 answers:

tangare [24]3 years ago

8 0

Explanation:

have not yet learnt chemistry so sorry

Elena-2011 [213]3 years ago

8 0

Answer:

350

Explanation:

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Explanation:

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2 years ago

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3 years ago

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3 years ago

How many parts per million of lead is found in 250 ml of water if there is 1.30g of lead in the water? 1ml=1g

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Answer:

5200 ppm

Explanation:

As per the definition, parts per million of a contaminant is a measure of the amount of mass of contaminant present per million amount of the solution. It is denoted by ppm.

Given in the question,

Water = 250 ml = 250 g

Lead = 1.30 g

So,

ppm of Lead = $\frac{Lead}{Water} \times 10^6$ = $\frac{1.30}{250} \times 10^6$ = 5200 ppm

So, as calculated above, there is 5200 ppm of lead present in 250 ml of water.

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3 years ago