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4 years ago

The water at the top of a waterfall has _____ energy.

Chemistry

2 answers:

Mariulka [41]4 years ago

4 0

I believe the answer is A. Potential

nignag [31]4 years ago

4 0

Answer:

The correct answer is a = potential

Explanation:

Hello! Let's solve this!

Water on top of a waterfall has accumulated potential energy. This energy has the bodies at rest and is due to its mass, its height and the acceleration of gravity. Once the water drop begins, this potential energy becomes kinetic energy.

The correct answer is a = potential

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Calculate the mass of chromium metal produced when 425.0mL of 0.25M chromium(ll) nitrate reacts with a strip of zinc that remain

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The balanced chemical equation for the production of chromium metal from the reaction of chromium(ll) nitrate reacts with a strip of zinc is:

3 Zn + 2 Cr(NO₃)₃ → 2 Cr + 3 Zn(NO₃)₂

This is a redox reaction, which is a chemical reaction in which one or more electrons are transferred between the reagents, causing a change in their oxidation states. In the proposed reaction, Cr oxidation state goes from +3 to 0, becoming metallic chromium, while Zn goes from being Zn⁰ to Zn²⁺.

The mass of chromium metal produced in the above reaction will be,

425.0 mL x $\frac{1 L}{1000 mL}$ x $\frac{0.25 mol Cr(NO_{3})_{3} }{1 L}$ x $\frac{2 mol Cr }{2 mol Cr(NO_{3})_{3} }$ x $\frac{51.9961 g Cr}{1 mol Cr}$ = 5.52 g

So, the mass of chromium metal produced when 425.0mL of 0.25M chromium(ll) nitrate reacts with a strip of zinc that remains in excess is 5.52 g of Cr.

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