alexandroperez13
04.07.2019 •
Biology
Evidence of a chemical change include a. change in size b. change in color c. change in shape d. change in weight/mass which of these would indicate a chemical change has occurred? a. salt dissolves in water b. a child colors a picture with a crayon c. solid iron is heated until it turns into a liquid d. a metal is added to an acid and hydrogen gas is formed
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Ответ:
d. hydrogen gas formed (formation of a gas is a sign of chemical change)
Ответ:
red is my favorite color