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KIM [24]
3 years ago
13

When 13.6 grams of kcl are dissolved in enough water to create a 180-gram solution, what is the solution's concentration, expres

sed as a percent by mass? 4.6% kcl 6.8% kcl 7.6% kcl 8.2% kcl?
Chemistry
2 answers:
bonufazy [111]3 years ago
8 0
7.6% KCl I had the same problem on my semester exam for summer school
jek_recluse [69]3 years ago
6 0

Answer: 7.6% KCl

Explanation: Mass of solute is given as 13.6 grams and the mass of solution is 180 grams. The question asks to calculate the solution concentration, expressed as a percent by mass.

The formula for percent by mass is:

% by mass = \frac{solute}{solution}*100

Let's plug in the values in the formula and do the calculations.

% by mass = \frac{13.6g}{180g}*100  = 7.6%

So, the correct choice is C) 7.6% KCl.

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Explanation:

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Why don't the praticles in a solid move past one another
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How many grams are in 1.946 moles of nacl
Ilia_Sergeevich [38]

Answer:

113.8g

Explanation:

Statement of problem: mass of 1.946mole of NaCl

Given parameters:

Number of moles of NaCl = 1.946mole

Unknown: mass of NaCl

Solution

To find the mass of NaCl, we apply the concept of moles which expresses the relationship between number of moles and mass according to the equation below:

                        Number of moles = \frac{mass}{molar mass}

To find the molar mass of NaCl:

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Mass of NaCl = Number of moles x molar mass of NaCl

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3 years ago
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