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Vilka [71]
3 years ago
11

Chose the statements that are TRUE from the list below Group of answer choices Ions exist alone in nature Lactate is created by

our muscles during anaerobic glycolysis, it reacts with water to form lactic acid. We add calcium carbonate to lakes after acid rain because the calcium ion is basic and will react with the acid. If Lake A has a limestone base and Lake B has a granite base, after each receive the same acid rain fall, Lake B will be more acidic than Lake A Fluorine anion is a weak base because hydrofluoric acid is a weak acid All salts are either acidic or basic after being dissolved in water.
Chemistry
1 answer:
hichkok12 [17]3 years ago
6 0

Answer:

Explanation:

1 ) Lactate is created by our muscles during anaerobic glycolysis, it reacts with water to form lactic acid  - True

2 ) We add calcium carbonate to lakes after acid rain because the calcium ion is basic and will react with the acid. True

3 )  If Lake A has a limestone base and Lake B has a granite base, after each receive the same acid rain fall, Lake B will be more acidic than Lake A : True

limestone is calcium carbonate which is basic but granite is not basic so it can not neutralise acid. So lake B remains more acidic .

4 ) Fluorine anion is a weak base because hydrofluoric acid is a weak acid False

A weak acid has strong anion . Hydrofluoric acid is weak but fluorine anion is strong.

5 ) All salts are either acidic or basic after being dissolved in water false .

Neutral salts are also found.

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What is the density of an object with a mass of 140 g and a volume<br> of 6 ml
Strike441 [17]

Answer:

<h2>23.33 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

From the question we have

density =  \frac{140}{6} =  \frac{70}{3}   \\  = 23.3333...

We have the final answer as

<h3>23.33 g/mL</h3>

Hope this helps you

5 0
3 years ago
A copper wire is made of copper (Cu) atoms. Which of the following best describes the copper atoms?
Evgesh-ka [11]

Answer: Option (A) is the correct answer.

Explanation:

An element is defined as a substance that contains atoms of same type.

As copper wire is a substance that is made up of only atoms of copper. And, all these atoms of copper will be the same. Hence, it is an element.

This means that all the atoms of copper will have same number of protons, neutrons and electrons.

Thus, we can conclude that the statement they are all exactly the same best describes the copper atoms.

3 0
3 years ago
Read 2 more answers
2N2 + 3H2 → 2NH3
denis23 [38]

There are two N≡N bonds and three H–H  bonds are in reactants.

Given:

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To find:

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Solution:

2N_2+3H_2\rightarrow 2NH_3

Reactants in the reaction = N_2, H_2

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Then in two N_2  molecules = 2 N≡N (triple bonds)

The bond between hydrogen atoms in single H_2 molecule = H-H (single bond)

Then in three H_2  molecules = 3  H-H (single bonds)

Product in the reaction =NH_3

The bonds between nitrogen and hydrogen atoms in single NH_3 molecule = 3 N-H (single bond)

Then in two NH_3  molecules = 6  N-H (single bonds)

So, there are two N≡N bonds and three H–H bonds are in reactants.

Learn more about reactants and products here:

brainly.com/question/21517037?referrer=searchResults

brainly.com/question/20602904?referrer=searchResults

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3 years ago
Please help due today
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7 0
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