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Nookie1986 [14]
3 years ago
15

An element that has been broken down and released particles and energy is said to be ____.

Chemistry
2 answers:
rjkz [21]3 years ago
8 0
It is said to be radioactive. Hope this was helpful because I'm learning this in school and I think it's right.
KatRina [158]3 years ago
5 0
Radioactive dating, is the answer
hope it helps (:
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3 years ago
How many atoms of carbon are represented in 3CH3CH20
pishuonlain [190]
6 carbon atoms

                        H    H
                         |     |
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8 0
3 years ago
A compound consisting of B, N, and H undergoes elemental analysis. The % composition by mass is found to be 40.28% B, 52.20% N,
swat32

Empirical formula is the simplest ratio of components making up a compound.

The percentage composition of each element has been given

therefore the mass present of each element in 100 g of compound is

                      B                                   N                         H

mass          40.28 g                         52.20 g                 7.53 g

number of moles  

                 40.28 g / 11 g/mol      52.20 g / 14 g/mol    7.53 g / 1 g/mol

                = 3.662 mol                  = 3.729 mol             = 7.53 mol

divide the number of moles by the least number of moles, that is 3.662

                3.662 / 3.662              3.729 / 3.662              7.53 / 3.662

               = 1.000                           = 1.018                        = 2.056

the ratio of the elements after rounding off to the nearest whole number is

B : N : H = 1 : 1 : 2

therefore empirical formula for the compound is B₁N₁H₂          

that can be written as BNH₂    

3 0
3 years ago
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