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kozerog [31]
3 years ago
6

What is true of a compound?

Chemistry
2 answers:
zalisa [80]3 years ago
7 0

Answer:

It does not always retain the properties of the substances that make it up

Explanation:

oksian1 [2.3K]3 years ago
6 0

Answer:

A/1

Explanation:

Compounds do <em>NOT</em> always retain the properties of the substances that make it up.

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How many protons are in an element with an atomic number of 8 and a mass number of 18?
Natalija [7]
The answer is 8. atomic number: the number of protons in the nucleus of an atom.
4 0
3 years ago
Read 2 more answers
What is the percent composition of CuO if a sample of CuO with a mass of 62.5 g contains 12.5 g of oxygen (O) and 50 g of Cu
Arlecino [84]

Percent (%) Composition of CuO

Cu = 1 x 50g      - Multiply by one as there is one Cu

O = 1 x 12.5g      - Multiply by one as there is one O

CuO = 62.5g

% for Cu = 50g over 62.5 multiplied by 100 = 80%

% for O = 12.5g over 62.5 multiplied by 100 = 20%

Final Answer :

<em>Percent (%) Composition of CuO = </em>80% (Cu) & 20% (O)

7 0
3 years ago
Compare the vapor pressure curves of 1-butene and 1-heptene. Explain your reasoning.
bixtya [17]
Because for there health

5 0
3 years ago
Read 2 more answers
When two clear, colourless liquids are mixed together, a yellow precipitate is formed. This is an example of a
Flura [38]

Answer:

Combining the two clear colorless liquids is a chemical change.

Explanation:

Because a different solid substance is formed. Tell students that a precipitate is an insoluble solid that forms when two solutions are combined and react chemically. Insoluble means that the solid will not dissolve.

3 0
3 years ago
2) Convert 2.65*10^ ^ 25 atoms of Chlorine to moles of CI
Irina18 [472]

Answer:

22 mol

Explanation:

Given data:

Number of atoms of Cl = 2.65×10²⁵ atom

Number of moles of Cl = ?

Solution:

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.

1 mole = 6.022 × 10²³ atoms

2.65×10²⁵ atom × 1 mol / 6.022 × 10²³ atoms

0.44×10² mol

22 mol

7 0
3 years ago
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