2 years ago

Which is a major environmental concern for our oceans?

Chemistry

2 answers:

STatiana [176]2 years ago

5 0

Plastic pollution is the top concern for our oceans at this time

padilas [110]2 years ago

3 0

Plastic pollution is the correct answer

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Calculate the molarity when 135 g of KCl is dissolved to make a 2.50 L solution. Round to two significant digits.

inysia [295]

Explanation:

$\textrm{Molarity of a solution}=\frac{\textrm{Number of moles of solvent}}{\textrm{Volume of solution in Liters}}$

We are given a $2.50L$ solution which contains $135g$ of $KCl$ .

To calculate number of moles of $KCl$ present, we need to find it's molar mass from charts. Molar Mass of $KCl$ is known to be $74.55\frac{g}{Mol}$ .

Number of moles of $KCl$ present = $\frac{\textrm{Given weight}}{\textrm{Molar Mass}}\textrm{ = }\frac{135g}{74.55\frac{g}{Mol}}\textrm{ = }1.81087mol$

Molarity = $\frac{1.81087mol}{2.50L}=0.7243\frac{mol}{L}$

∴ Molarity of given $KCl$ solution = $0.72\frac{mol}{L}$

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3 years ago

From the list of substances, identify each as a strong acid, strong base, or neither a strong acid nor a strong base.

Dafna11 [192]

Answer:

HNO3 is a strong acid

HCl is also a strong acid

NaCl is a salt so it is neither a strong acid nor a strong base

Ca(OH)3 is a strong base

Explanation:

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2 years ago

At a constant pressure and amount of gas, how are temperature and volume related?

RSB [31]

The volume is directly proportional to the absolute temperature so the answer is A.

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3 years ago

Familiar solutions can have a wide range of pH levels. According to the chart, which is the strongest acid, based on its pH leve

MrRissso [65]

Answer:

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Part 2--one hundred times

Part 3--Baking Soda

Explanation:

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Explanation:

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