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2 years ago

Convert 3.80 mol of KCI to grams?

Chemistry

1 answer:

vagabundo [1.1K]2 years ago

8 0

Answer:

283 grams KCl

Explanation:

To convert form moles to grams, you need to find the molar mass of your compound. The molar mass can be calculated using the individual molar masses of each element in the compound. These values can be found on the periodic table.

Molar Mass (K) = 39.098 g/mol

Molar Mass (Cl) = 35.453 g/mol

Molar Mass (KCl) = 39.098 g/mol + 35.453 g/mol

Molar Mass (KCl) = 74.551 g/mol

Now that you know the molar mass, you want to multiply it by the moles of KCl. This is possible because the molar mass is actually a ratio representing the relationship of grams and moles. In KCl, there are 74.551 grams of KCl for every 1 mole of KCl. When you are multiplying, make sure you set the ratio up in a way that allows for the units to cancel out and leave grams as your final answer.

3.80 moles KCl 74.551 g
----------------------- x ------------------- = 283 grams KCl
1 mole KCl

The final answer should have 3 sig figs because the value the problem gave (3.80 mol) also has 3 sig figs.

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3 years ago

gThe mole fraction of potassium nitrate in an aqueous solution is 0.0194. The solution's density is 1.0627 g/mL. What is the mol

xxMikexx [17]

Answer:

0.595 M

Explanation:

The number of moles of water in 1L = 1000g/18g/mol = 55.6 moles of water.

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0.0194 = x/x + 55.6

0.0194(x + 55.6) = x

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xA= mole fraction of solvent

xB= mole fraction of solute

nA= number of moles of solvent

nB = number of moles of solute

MA= molar mass of solvent

MB = molar mass of solute

d= density of solution

Molarity = xBd × 1000/xAMA ×xBMB

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3 years ago

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Answer:

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Explanation:

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3 years ago

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Hello ^^

Answer:

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Hope this helps!

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3 years ago

Read 2 more answers

A 720. cm^3 vessel contains a mixture of Ar and Xe. If the mass of the gas mixture is 2.966 g at 25.0°C and the pressure is 760.

sleet_krkn [62]

Explanation:

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