The illustration above depicts a spring being compressed and then released. Changes in both potential and kinetic energy occur

Chemistry

2 answers:

Alexeev081 [22]3 years ago

7 0

Answer:
C). The potential energy is increasing through steps A & B, then decreases at C.

Anestetic [448]3 years ago

5 0

Answer:

the potential energy is increasing through steps A & B, then decreases at C.

Explanation:

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How many moles of KBr are present in 180. mL of a 0.108 M solution?

Jlenok [28]

by molality you can find the mole

6 0

3 years ago

2 H2 + O2 → 2 H2O <br> How many grams of H2O are produced when 2.50 moles of oxygen are used?

vodomira [7]

Answer:

90g

Explanation:

The equation for the reaction is given below:

2H2 + O2 → 2H2O

From the equation above,

1 mole of O2 produced 2 moles of H2O.

Therefore, 2.5 moles of O2 will produce = 2.5 x 2 = 5 moles of H2O.

Now let us convert 5 moles to H2O to grams to obtain the desired result. This is shown below:

Molar Mass of H2O = (2x1) + 16 = 2 + 16 = 18g/mol

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Mass of H2O = ?

Mass = number of mole x molar Mass

Mass of H2O = 5 x 18 = 90g

Therefore, 90g of H2O are produced

8 0

4 years ago

A voltaic cell has a zinc anode and a copper cathode. They are connected by a wire but no salt bridge. What can you predict will

Allisa [31]

The prediction is that B. The electrons will flow to the zinc anode where a negative charge will build up and eventually halt the reaction.

This is known as a chemical element, of the periodic table, that is essential to life and is one of the most widely used metals. Zinc is of considerable commercial importance.

Without the salt bridge, positive and negative charges will build up around the electrodes causing the reaction to stop.

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