3 years ago

A solid is placed in a solution. Which observation most likely indicates that a chemical reaction has occurred?

1 answer:

3 0

A change in color, odor, or texture

(Also rust)

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kogti [31]

A. Rock Cycle

Hope its right!(:

5 0

3 years ago

rewona [7]

Answer:

Explanation:

A fuel cell uses both hydrogen and oxygen as fuels. At the cathode oxygen is reduced to water according to the equation

O2+4H^+ +4e ------>2H2O

And hydrogen is oxidized at the anode:

2H2------>4H^+ +4e

Fuel cells produce only water as a by product hence they are environment friendly

5 0

3 years ago

kifflom [539]

Reactivity is the name your looking for I believe.

6 0

3 years ago

N76 [4]

Definitely not D i would guess A or B

7 0

3 years ago

Natali5045456 [20]

There are 6.33 × 10²⁵ hydrogen atoms in this solution in total.

<h3>Explanation</h3>

2.10 × 10²⁵ water molecules and 7.10 × 10²⁴ ammonia molecules will contain

$2 \times 2.10 \times 10^{25} + 3 \times 7.10 \times 10^{24} = 6.33 \times 10^{25}$ hydrogen atoms in total.

8 0

3 years ago