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Nastasia [14]
3 years ago
12

How many grams of lithium chloride, molecular mass 42.5, are dissolved in water to make 500 mL of a 0.450 M solution?

Chemistry
1 answer:
ArbitrLikvidat [17]3 years ago
4 0

Answer:

9.5625 gram

Explanation:

Molarity = mass in gram ÷ molar mass × volume in dm3

Mass in gram = molarity× molar mass × volume of solution in dm3

Mass in gram = 0.450×42.5×0.5=9.5625 g

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Which of the following is true regarding the law of conservation of mass
Luda [366]
These are the answer options of this question and the comments about their validity:

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False: the number of molecules can change. Take this simple reaction for example:

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2 years ago
Which element will gain only one electron during a chemical reaction?
pashok25 [27]

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8 0
2 years ago
Calculate the molarity of a solution<br> made by 1,5kg of K. CO₂ in 850 mL<br> of water.
anastassius [24]

Answer:

17.83M

Explanation:

Given parameters:

Mass of KCO₂ = 1.5kg

Volume of water  = 850mL

Unknown:

Molarity of solution  = ?

Solution:

Molarity is defined as the number of moles per unit volume. It is the number of moles of solute in a given volume of solution.

   Molarity  = \frac{number of moles }{volume}

Number of moles of solute  = \frac{mass of KCO_{2} }{molar mass}

  Molar mass of KCO₂  = 39 + 12 + 3(16) = 99g/mol

  Number of moles  = \frac{1500}{99}   = 15.15moles

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Molarity  = \frac{15.15}{0.85}   = 17.83M

8 0
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