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Citrus2011 [14]
3 years ago
12

Copper has two isotopes,

Chemistry
1 answer:
Anestetic [448]3 years ago
5 0

Answer:

69.152 % → 63Cu

30.848 % → 65Cu

Explanation:

As you know, the average atomic mass of an element is determined by taking the weighted average of the atomic masses of its naturally occurring isotopes.

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Diamond is a natural form of pure carbon. What number of atoms of carbon are in a 1.00-carat diamond (1.00 carat = 0.200 g)?
slega [8]

Answer:

1.004×10²²

Explanation:

The molar mass of carbon is 12 g/mol

which means that:

<u>1 mole of carbon atoms has a mass of 12 grams.</u>

Since, diamond is a allotrope of carbon.

Mass of  1.00-carat diamond in grams is:

1.00 carat = 0.200 g

<u> Since, 1 mole of C contains 6.022×10²³ atoms of C</u>

So,  

12 grams contains 6.022×10²³ atoms of C

1 gram contains 6.022×10²³/ 12 atoms of C

0.200 gram contains (6.022×10²³/ 12)×0.200 atoms of C

Thus,

<u>1 carat diamond contains 1.004×10²² atoms of C.</u>

8 0
2 years ago
Does anyone know how to do this ??
lord [1]

Answer:

Look at your periodic table

Explanation:

It tells you everything like Potasium 1 and 1 ox and 1 hydrogen

7 0
3 years ago
Does spring and Fall exist at the poles?
seropon [69]

Answer:

Yes

Explanation:

The tilt of the Earth means the Earth will lean towards the Sun (Summer) or lean away from the Sun (Winter) 6 months later. In between these, Spring and Autumn will occur. The North pole always points the same way as the Earth revolves around the Sun.

4 0
3 years ago
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Which does your digestive system use to break down food molecules? Bases or Acids
Harman [31]

Answer:

acid

Explanation:

4 0
3 years ago
Is PO4^-3 polar, non-polar, or ionic?
Gala2k [10]
The answer is PO4^-3 is non-polar.
8 0
3 years ago
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