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3 years ago

A water sample is found to contain 59 ppm

Chemistry

1 answer:

NeX [460]3 years ago

8 0

Explanation:

k so basically u gotta do 59/1000000 then multiply that by 972 which gives u 0.057348

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D) When atoms form ions they become more stable as they gain a ?

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Answer:

Like the inert gases(noble gases).

Explanation:

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3 years ago

The pH of an unknown strong acid is 2. What<br> is the hydronium ion concentration?

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3 years ago

How many liters of methane gas (CH4) need to be combusted to produce 8.5 liters of water vapor, if all measurements are taken at

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3 years ago

How much potassium chloride is needed to make 0.500 m solution with 1.50 L of water?

Andrew [12]

Answer:

55.9 g KCl.

Explanation:

Hello there!

In this case, according to the definition of molality for the 0.500-molar solution, we need to divide the moles of solute (potassium chloride) over the kilograms of solvent as shown below:

$m=\frac{mol}{kilograms}$

Thus, solving for the moles of solute, we obtain:

$mol=m*kilograms$

Since the density of water is 1 kg/L, we obtain the following moles:

$mol=0.500mol/kg*1.50kg\\\\mol=0.75mol$

Next, since the molar mass of KCl is 74.5513 g/mol, the mass would be:

$0.75mol*\frac{74.5513g}{1mol}\\\\55.9g \ KCl$

Regards!

4 0

3 years ago