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zimovet [89]
3 years ago
11

1

Chemistry
1 answer:
GenaCL600 [577]3 years ago
6 0

Answer:

750 newtons

Explanation:

newtons law stats that anything in motion stays in motion unless intervene. friction tends to do that for u but if there is no friction it should have the same force it started with

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The mineral magnesite contains magnesium carbonate, MgCO3 (molar mass= 84 g/mol), and other impurities. When a 1.26-g sample of
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The answer is 33.33 %


The explanation:


According to the reaction equation:


MgCO3(s) + 2HCl (aq) --> MgCl2(aq) + H20(l) + CO2(g)


we can see that 1 mole of MCO3 will produce → 1 mole of CO2


-Now we need o get number of mole of CO2:


and when we have 0.22 g of CO2, so number of mole = mass / molar mass


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∴ moles of Mg = moles of CO2 = 0.005 mole


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∴ Percent of MgCO3 by mass of Mg = 0.42 g / 1.26 * 100


= 33.33 %



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