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 many moles of s atoms are present in 76.1 g of cs2?

Which of the following is not true? A force can be directly seen in just the same way that changing position can be seen. Forces push or pull on an object and can cause an object to move or stop moving.

During which stage of a scientific investigation is it most useful to organize information in graphs and tables? A. research related information B. identify a problem or need C. analyze the results D. design an investigation

Metals are used in many products because of the characteristic properties that most metals have. Which product requires the high luster of metals in order to work?

Hook was the first to discover cells in a cork. a. True b. False

What is the molarity of a solution with 1.17 moles of Ca (OH) 2 disolved in 0.2 liters of water? A. 1.17 M B. 0.2 M C. 0.17 M D. 5.85 M

What happens to acetone molecules when you add heat to a beaker of liquid acetone?

An effluent discharge with a flow of 1.5 m3/s and an ammonium-N concentration of 2 mg/L is released to a river with a flow of 12 m3/s and an ammonium-N concentration of 0.015 mg/L.

If you were to pour 4 different liquids into a glass and the liquids separated into 4 layers, which liquid would have the highest density?

As magma rises to the surface what happens to the gases in it