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uranmaximum [27]
3 years ago
8

Amy's cousins help Andy out and drive him to the soccer field. They travel 15 m/s.

Chemistry
1 answer:
DochEvi [55]3 years ago
8 0
Dududuchcucu I h y y y y y red t e. Drrr. Erred tfyryt ty
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What is the change in air pressure over a given distance called? wind speed air pressure force factor air pressure gradient​
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Which statement describes the charge and location of an electron in an atom?
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3 0
3 years ago
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The mineral enargite is 48.41% cu, 19.02% as, and 32.57% s by mass. what is the empirical formula of enargite?
LuckyWell [14K]
Empirical formula is the simplest ratio of whole numbers of components in a compound. 
Assuming for 100 g of the compound 
                                Cu                                 As                             S
mass                      48.41 g                          19.02 g                      32.57 g
number of moles    48.41 / 63.5 g/mol      19.02 / 75 g/mol        32.57 / 32 g/mol 
                                = 0.762 mol                = 0.2536 mol            = 1.018 mol 
divide by the least number of moles 
                               0.762 / 0.2536             0.2536 / 0.2536         1.018 / 0.2536
                               = 3.00                          = 1.00                         = 4.01
once they are rounded off 
Cu - 3
As - 1
S - 4
therefore empirical formula is Cu₃AsS₄
8 0
3 years ago
Read 2 more answers
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