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Vlada [557]
3 years ago
14

Calculate the mass number of an atom that has 92 protons and 108 neutrons

Chemistry
1 answer:
forsale [732]3 years ago
6 0
What element would have 73 protons and 108 Neutrons?

Because there are 73 Protons and that equals the Atomic Number .. what is the element that is 73 as its atomic number? 

Tantalum

Because we know that there are 73 Protons and 108 Neutrons ..we could do this 73+108 = 181

So its name is Tantalum-181

hope this helps.
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Explanation:

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Compound formula: MgCl2
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Which human activity would most likely decrease the amount of carbon in the atmosphere?
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The removal of trees would most likely decrease the amount of carbon in the atmosphere.

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4 years ago
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Certain compound contains 7.3% carbon, 4.5% hydrogen, 36.4% oxygen, and 31.8% nitrogen. It’s reality molecular mass is 176.0. Fi
erastovalidia [21]

Answer:

The answer to your question is:

Explanation:

Data

carbon        7.3%          =     7.3g

hydrogen    4.5%         =      4.5g

oxygen       36.4%         =     36.4 g

nitrogen     31.8%         =     31.8 g

Now

For carbon

                    12 g --------------------1 mol

                    7.3 g     -------------     x

                       x = 7.3/12 = 0.608 mol

For hydrogen

                 1 g   --------------------  1 mol

                 4.5 g  ------------------    x

                   x = 4.5 mol

For oxygen

             16 g ------------------- 1 mol

             36.4 g ----------------    x

             x = 2.28 mol

For nitrogen

              14 g   ----------------   1 mol

              31.8 g ---------------    x

             x = 2.27 mol

Now divide by the lowest result, the is 0.608 from carbon

carbon              0.608/0.608 = 1

hydrogen           4.5/ 0.608 = 7.4

oxygen              2.28/0.608 = 3.75

nitrogen             2.27/0.608 = 3.73

Empirical formula = CH₇O₄N₄

     

6 0
3 years ago
PLEASE HELP!!!
umka21 [38]

Answer:

the answer is A

Explanation:

physical changes does not change the property of matter.

7 0
2 years ago
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