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vredina [299]
3 years ago
5

What does the atomic number represents

Chemistry
2 answers:
bezimeni [28]3 years ago
8 0

the number of protons in the nucleus in an atom

drek231 [11]3 years ago
5 0

Answer:

the atomic number represents the number of protons an atom has.

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If an object with a volume of 105 mL and a density of 0.801 g/mL, what is the objects mass?
garik1379 [7]

Answer:

The objects mass is 84, 105 g. See the explanation below, please.

Explanation:

We use the formula:

Density= mass/volume

Mass= Density x volume =0.801 g/mL x 105 mL = 84, 105 g

6 0
3 years ago
Study the image
balandron [24]

Answer:

A

Explanation:

Just Because

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What is graphite and what do you use it for?
rjkz [21]
Because it is a solid material, it is known as a dry lubricant. This is useful in applications where “wet” lubricants, such as oil, cannot be used<span>. </span>Graphite<span> is the only non-metal element that is a good conductor of electricity. Natural </span>graphite<span> is </span>used <span>mostly in what are called refractory applications.</span>
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4 years ago
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The activity of 14C in a 50 -kg human body is estimated to be 2.6 kBq . What is this activity in microcuries?
cupoosta [38]

To make the conversion we must take into account the relationship between kBq and microcuries. Both are units that represent radioactivity activity. The relationship is:

1 kilobecquerel (kBq) = 0.027027027 microcurie

Therefore, 2.6kBq will be equal to:

\begin{gathered} microcuries=givenkBq\times\frac{0.027027027microcurie}{1kBq} \\ m\imaginaryI crocur\imaginaryI es=2.6kBq\times\frac{0.027027027m\imaginaryI crocur\imaginaryI e}{1kBq} \\ microcuries=0.070 \end{gathered}

Answer= That activity in microcuries will be 0.070 microcuries

6 0
1 year ago
A photon has an energy of 4.0 x 10-19 Joules. What is the frequency of the radiation?​
likoan [24]
6.04 x 10^14. See attached work.

7 0
3 years ago
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