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Effectus [21]
3 years ago
11

Which of the following statements about matter is false?

Chemistry
2 answers:
4vir4ik [10]3 years ago
8 0
The statement that is incorrect I believe would be A. The amount of matter increases slightly as water changes state.
weqwewe [10]3 years ago
4 0
I think the correct answer from the choices listed above is option A. The statement that is false about matter is that the <span>amount of matter increases slightly as water changes state. This statement is very far from being true. There is no known correlation between the amount of matter and the change of state in water.</span>
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Which one of the following pair has the same number of ions?
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3 years ago
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HELP ASAP, TIMED ASSINGMENT
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Answer:

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A sample of a chromium-containing alloy weighing 3.450 g was dissolved in acid, and all the chromium in the sample was oxidized
Zina [86]

Answer:

H_2O + 2CrO_4^2- + 3SO_3^2- -> 3SO_3^2- + 2CrO_2^- + 2OH^-

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5 0
3 years ago
Which of the following releases the greatest amount of energy as it proceeds? Assume the same mass of starting material is used
Ivanshal [37]
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4 0
3 years ago
Calculate the. number of moles of Cu. in 8.0×1021 atoms of Cu​
drek231 [11]

Answer:

8.0 × 10²¹ atoms contain 1.33 × 10⁻² moles.

Explanation:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

Given data:

Number of atoms = 8.0 × 10²¹ atoms

Number of moles = ?

Solution:

One mole of Cu = 6.022 × 10²³ atoms

For 8.0 × 10²¹ atoms:

(1 mol / 6.022 × 10²³ atoms)×8.0 × 10²¹ atoms

1.33 × 10⁻² moles

So, 8.0 × 10²¹ atoms contain 1.33 × 10⁻² moles.

7 0
3 years ago
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