When a strip of magnesium metal is touched to a flame, a bright light and a whitish substance are produced. Why is the burning of magnesium considered a chemical change?

How do you separate the sugar and water in a solution of sugar and water?

Select the factors that influence the rate of a chemical reaction. a. altering the concentration of reactants in the vessel b. changing the temperature of the reaction c. modifying the surface area of reactants d.

Energy is involved in some way in all chemical reactions. Which type of reaction involves the absorption of energy from the surroundings? Options: exothermic reactions endothermic reactions

If you cut an apple into slices and leave them in the open air, they will slowly turn brown. What kind of chemical change is this? Explain.

Power, especially electricity, the source of which is fission or fusion.

Spasmolytics can be used to treat

What changes do you shown in the model

Select all the correct answers. What are the products of the acid-base reaction between HClO3 and LiOH? LiClO4 H2O LiH LiClO3 HClO4

Under what conditions will light bend? a) Never b) When it slows down while going through space c) When it speeds up while going through space d) When it passes from one medium to another

Cells can manipulate the free energy of reactions by: (Select all that apply) Changing the concentrations of products and reactants Changing the concentration of the enzyme involved in the reaction Using enzymes A.