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andriy [413]
3 years ago
6

Rick runs 100 feet in 20 seconds what’s his speed?

Chemistry
2 answers:
Ksivusya [100]3 years ago
5 0

Answer:

5 feet per second

Explanation:

s=d÷t

100÷20=5

Free_Kalibri [48]3 years ago
5 0
Answer:
5 ft/s

explanation:
speed = distance/time
speed = 100/20
speed = 5ft/s
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The corret answer is D

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When calcium metal (Ca) reacts with oxygen gas (O2), it produces the ionic compound calcium oxide (CaO). Write the balanced equa
malfutka [58]

The balanced chemical equation for the reaction is

2Ca(s) + O₂(g) → 2CaO(s)

and

The process meets the requirements to be considered a redox reaction.

From the question,

We are to write a balanced chemical equation for the reaction between Calcium metal and oxygen gas

The balanced chemical equation for the reaction is

2Ca(s) + O₂(g) → 2CaO(s)

This is the balanced chemical equation for the reaction

To determine whether the reaction meets the requirements to be considered a redox reaction,

We will define the term <em>redox reaction</em>

<em></em>

A <em>redox reaction</em>, also called oxidation-reduction reaction, is any chemical reaction in which the oxidation number of a participating chemical species changes.

From the balanced equation above we can observe that the oxidation number of the participating species(Calcium and oxygen) changed.

The oxidation number of Calcium changed from 0 to +2

and

The oxidation number of Oxygen changed from 0 to -2

∴ The process meets the requirements to be considered a redox reaction.

Hence, the balanced chemical equation for the reaction is

2Ca(s) + O₂(g) → 2CaO(s)

and

The process meets the requirements to be considered a redox reaction.

Learn more here: brainly.com/question/17716543

7 0
2 years ago
How to find the Ka of an acid?
bonufazy [111]
We know that acids have a pH of under 7. 

We also need to:
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Answer:

the elements atomic mass

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