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Yakvenalex [24]
2 years ago
15

Explain what is meant by the phrase mass is conserved.’

Chemistry
2 answers:
ss7ja [257]2 years ago
6 0

Answer:

Explanation:

Acording to e=mc2 mass is a type of energy known as "rest energy", acording to the first law of thermodynamics All Energy Is Conserved. that doesent mean that they cant change form, but its to say that energy is constant and not changing over time. althogh mass is mostly conserved it can change to energy, thats why there is an atomic bomb

Alisiya [41]2 years ago
5 0

Answer:

in a chemical reaction, the mass of the products will always be equal to the mass of the reactants.

Explanation:

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Gemiola [76]

Answer:

A. m C5H12 = 108.23 g

B. m F2 = 547.142 g

C. m Ca(CN)2 = 71.85 g

Explanation:

  • mass (m) = mol (n) × molecular weigth (Mw)

∴ Mw C5H12 = ((12.011)(5)) + ((1.008)(12)) = 72.151 g/mol C5H12

∴ Mw F2 = (18.998)(2) = 37.996 g/mol F2

∴ Mw = Ca(CN)2 = 40.078+((12.011+14.007)(2)) = 92.114 g/mol Ca(CN)2

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3 years ago
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Dmitrij [34]

Answer:

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Answer:

Explanation:

Firstly, we have to determine the mass of metal X. We can do that by interpreting the first and second statement mathematically.

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The mass of oxygen in A is 0.72g and the mass of oxygen in B is 1.16g.

The mass of metal X in the two oxides will be the same because it's the same metal.

Thus, we represent the mass of the metal in the two oxides as 2X.

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X = 1×0.56/1.16

X = 0.48 g

Thus, 0.48g of the metal will combine with 1g of oxygen for B

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