Sophia performs an experiment in which she adds 10.0 grams of zinc metal to 25.0 grams of bromine. She claims that mass will be conserved during the reaction. Which of the following BEST supports her claim? A The mass of the final product will be equal to the mass of the zinc metal, 10.0 grams. B The mass of the final product will be equal to the difference between the two masses, 15.0 grams. C The mass of the final product will be equal to the mass of the bromine, 25.0 grams. D The mass of the final product will be equal to the total mass of both reactants, 35.0 grams.

Mass is conserved in a chemical reaction, which of these is TRUE about the mass of the products?  *1 pointless than the mass of the reactantsequals to the mass of the reactantgreater than the mass of the reactantsnot related to the mass of the reactants

The law of conservation of mass states that:The mass of products is greater than the mass of reactantsThe mass of products is less than the mass of reactantsThe mass of products is equal to the mass of reactantsThe mass of products can be either greater than or less than the mass of reactants2How many grams of copper oxide are produced during the following reaction (assuming it is complete)?: 2Cu (6.35 g) + O2 (1.60 g) → 2CuO7.95 g4.75 g6.35 g15.9 g3In a chemical reaction, the mass of products is often lower than expected. There are several explanations for why this might be the case. Which of the following is not a possible explanation?Some of the reactants may have reacted in different unexpected waysThe mass of the reactants is greater than the mass of the productsThe reaction may not have finishedSome of the product may have been lost during removal4Which of the following is a balanced equation for the formation of water from hydrogen and oxygen?2H2 + O2 → H2O2H2 + 2O2 → 2H2O2H2 + O2 → 2H2OH2 + O2 → H2O25Which of the following is a balanced equation for the reaction of hydrogen and chlorine?H2 + Cl2 → HCl2H + 2Cl → 2HClH2 + Cl2 → 2HClH + Cl → HCl

A student wants to design a simple investigation to prove that mass is conserved during a chemical reaction.Which of the following investigations will provide evidence the student needs to prove the claim that mass is always conserved in a chemical reaction?A Compare the mass of a candle before and after burning it.B Compare the mass of a piece of paper before and after tearing it.C Compare the mass of a piece of copper before and after melting it.D Compare the mass of a cup of water with a sealed lid and an Alka-Seltzer tab before and after adding the Alka-Seltzer tablet to the water.

The reaction between solid aluminum and liquid bromine is exothermic. This reaction creates the product aluminum bromide. What equation includes the correct formulas and demonstrates conservation of mass?AAl(s) + 3Br(l) → AlBr3(s)BAl(s) + Br2(l) → AlBr3(s)C2Al(s) + 3Br2(l) → 2AlBr3(s)DAl(s) + Br(l) → AlBr(s)

How does a balanced chemical equation show the conservation of mass?A.It shows that the mass of the products is greater than the mass of the reactants when a reaction increases the moles of substances.B.It shows that the number of each type of atom stays the same.C.It shows that the total number of moles of substances stays the same.D.It shows that the mass of the reactants is greater than the mass of the products when gases are produced by the reaction.