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3 years ago

Which of the following characteristics must be present for a substance to be called a mineral?

Chemistry

2 answers:

atroni [7]3 years ago

7 0

Answer is A have a crystal structure.

Elis [28]3 years ago

7 0

Answer:

A. have a crystal structure

Explanation:

A mineral has a definite chemical structure

It has to be a solid

A mineral is inorganic

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Carbonic acid can form water and carbon dioxide upon heating. How much carbon dioxide is formed from 4.6 g of carbonic acid? H2C

Sedbober [7]

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6 0

3 years ago

4.07 x 10-17<br> (5.6 x 10") (5.8 x 105)

Andrej [43]

4.07 x 10-17 = 23.7
(5.6 x 10”) (5.8 x 105)= log(100)
log(7)
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2 years ago

What is the molarity of a solution that contains 87.75g of NaCI in 500.ml of solution

Brut [27]

Answer:

M = 3.0 mol/L.

Explanation:

We can calculate the molarity of a solution using the relation:

<em>M = (mass x 1000) / (molar mass x V)</em>

M is the molarity "number of moles of solute per 1.0 L of the solution.

mass is the mass of the solute (g) (m = 87.75 g of NaCl).

molar mass of NaCl = 58.44 g/mol.

V is the volume of the solution (ml) (V = 500.0 ml).

∴ M = (mass x 1000) / (molar mass x V) = (87.75 g x 1000) / (58.44 g/mol x 500.0 ml) = 3.0 mol/L.

6 0

3 years ago

Explain why an indicator is used in titration

stellarik [79]

Answer:

Titrations. Because a noticeable pH change occurs near the equivalence point of acid-base titrations, an indicator can be used to signal the end of a titration. When selecting an indicator for acid-base titrations, choose an indicator whose pH range falls within the pH change of the reaction.

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4 0

3 years ago

Water is known as the universal solvent. One reason water makes a good solvent is because it is composed of polar molecules. Wha

Flauer [41]

Answer: Option (C) is the correct answer.

Explanation:

A water molecule is made up of two hydrogen atoms and one oxygen atom. Its molecular formula is $H_{2}O$ .

It is known that hydrogen is electropositive in nature whereas oxygen is electronegative in nature. Therefore, oxygen will pull the electron of hydrogen towards itself as a result, there will be formation of partial positive charge on hydrogen and partial negative charge on oxygen atom.

Thus, the water molecule becomes polar. So, we can conclude that water molecule is a polar molecule because water molecules have a positive charge on one end and a negative charge on the other.

5 0

2 years ago