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Yakvenalex [24]

3 years ago

15

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

2 answers:

ss7ja [257]3 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]3 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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(a) Calculate the mass percentage of NaCl in a solution containing 1.50 g of NaCl in 50.0 g of water. (b) A commercial bleaching

stepan [7]

Answer:

a) 2.91%

b) 90.5 grams

Explanation:

Mass percentage is

mass%= $\frac{massofsoluteX100}{massofsolute+massofsolvent}$

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The mass of water = 50.0 g

Total mass =1.5+50=51.50 g

mass% = $\frac{1.5X100}{50+1.5}=2.91$ %

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3 years ago