1 year ago

WHOEVER CAN HELP MEEEEE SAY "I" AND I WILL GIV U MANY MANY POINTS, THANKS, BRAINLIEST!!!! PLSSSSSSSSS

Chemistry

1 answer:

Gwar [14]1 year ago

4 0

1: Biosphere

2: Atmosphere

3: Hydrosphere

4: Atmosphere (I think?)

5: Stratosphere

6: Biosphere

7: Hydrosphere

8: Geosphere

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As a pendulum swings from its highest to its lowest position along an arc, what happens to its kinetic energy and potential energy? The potential energy decreases while the kinetic energy increases.

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How many grams of MgCl2 would be needed to make 5.3 liters of a 0.25 molar solution? Round your answer to the nearest 0.01,

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Answer: 126.1 grams of are needed to make 5.3 L of 0.25 M solution

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

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$\text{Molarity of the solution}=\frac{\text{given mass of solute}}{\text {Molar mass of solute}\times \text{Volume of solution in L}}$

$0.25M=\frac{x}{95.2g/mol\times 5.3L}$

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Thus 126.1 grams of are needed to make 5.3 L of 0.25 M solution

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