According to the law of conservation of mass, the mass of a substance should during a chemical reaction.

a) multiply

b) not change

c) disappear

d) grow

B is the correct answer.

Explanation:

Law of conservation of mass states that the mass of an object never changes with time. This means that during a chemical reaction mass of reactants always remains the same even after the formation of products.

We can conclude that the law of conservation of matter states that during a chemical reaction, the amount of matter does not change .

the core of the sun is so hot and there is so much pressure, nuclear fusion takes place, hydrogen is changed to helium. nuclear fusion creates heat and photons. when the heat reaches the earth it warms the molecules of the atmosphere, and they warm other molecules and so on.