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ehidna [41]
3 years ago
11

If the chemical equation below is balanced using only whole numbers, what is the smallest whole-number coefficient for water?

Chemistry
1 answer:
meriva3 years ago
4 0

Answer:

c. 3

Explanation:

Fe₂O₃ + H₂ ---> Fe + H₂O

1) I'd start with balancing the oxygen on both sides as there are three on the left and one on the right. Add 3 in front of H₂O to solve this. Now we have

Fe₂O₃ + H₂ ---> Fe + 3H₂O

Fe₂O₃ + H₂ ---> Fe + 3H₂O

2) Fe is not balanced as there are two Fe on the left and one Fe on the right. Add 2 in front of Fe to give

Fe₂O₃ + H₂ ---> 2Fe + 3H₂O

3) Fe₂O₃ + H₂ ---> 2Fe + 3H₂O

H is not balanced as there are two H on the left and 6 H on the right (3 × 2 = 6) so add 3 in H₂ to be equal

Fe₂O₃ + 3H₂ ---> 2Fe + 3H₂O

the equation is fully balanced

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Answer:

b

Explanation:

it is right

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3 years ago
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You identify a molecule in a pizza that is a polymer; has oxygen, hydrogen, and sulfur atoms; and is hydrophilic. What kind of m
matrenka [14]

The kind of molecule in this pizza is a protein because it is a polymer, <u>hydrophilic</u>, and it's made up of oxygen, hydrogen, and sulfur atoms.

<h3>What is an amino acid?</h3>

An amino acid refers to a simple and organic chemical compound that consist of an acidic carboxyl group (COOH), a basic amino group (NH_2), and a unique side chain group.

<h3>What is a protein?</h3>

A protein can be defined as a <u>hydrophilic</u>, macromolecule (polymer) that is formed as a result of the union of many amino acids.

Generally, a protein contains the following chemical elements:

  • Oxygen (O) atoms
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In conclusion, the kind of molecule in this pizza is a protein because it is a polymer, <u>hydrophilic</u>, and it's made up of oxygen, hydrogen, and sulfur atoms.

Read more on protein here: brainly.com/question/19145247

4 0
2 years ago
EXPERIMENT: THE CABBAGE INDICATOR
Nikitich [7]

Answer:

EXPERIMENT: THE CABBAGE INDICATOR

Here are your goals for this lesson:

Use indicator for each substance to determine if substance is an acid or a base

Summarize results and the experimental method

You can use the natural indicator in red cabbage juice to determine which household liquids are acids or bases. If no change in the color of the cabbage juice takes place, the liquid is neither an acid nor base; it is neutral.

Acids and bases are opposites. When an acids and base are mixed, they neutralize each other. You can use an indicator to see the neutralized reaction. The cabbage juice will change color when the liquids are neutralized.

Online Lab

This video will demonstrate how an indicator, in this case, cabbage indicator, can be used to determine whether a solution is acidic or basic. As you watch the video, remember to record your data and observations to use to present your findings.

Compile a summary of your findings from this experiment. Include your hypothesis, observations, data, and conclusions. Be sure to answer the questions below as well as explaining the method and results.

r.

Explanation:

8 0
2 years ago
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For each pair of salts, determine which of the salts, if any, would be expected to be more soluble in acidic solution than in pu
gogolik [260]

Answer:

AgNO2

Explanation:

The question asks to know which of these two insoluble salts is expected to be more soluble in acidic solution than in pure water.

To answer this question specifically, we need to know if the anions contained in the insoluble salt is a conjugate of a weak acid or that of a weak base.

Generally, the solubility of insoluble salts that contain anions which are conjugates of weak acids increases in the presence of an acidic solution than in water. While, the solubility of insoluble salts that contain anions which are conjugates of strong acids decreases in the presence of an acidic solution.

Having said this, AgNO2 contains NO2 which is the conjugate base of the Trioxonitrate iii acid which is a weak acid. Hence, it is expected to be stronger in acidic solution than in water.

4 0
3 years ago
How many molecules are in 18 grams of water
zlopas [31]

Answer:

6.023×10^23

Explanation:

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2 years ago
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