A piece of platinum metal with a density of 21.5 g/cm3 has a volume of 8.89 cm3. what is its mass?

Which best describes the process of radiation? A. Sunlight transfers energy to land, air, or water. B. Reflections from the surface warm the atmosphere. C. Warm air transfers heat energy to cold air. D. Cold air transfers heat energy to warm air.

When group 2 elements form ions they?

The difference between a monatomic ion and a polyatomic ion

Which of the following statements is true? A. Particles of a solid have a very orderly, three dimensional arrangement and do not move B. Particles of a liquid change shape and volume C.

How well would you expect a microwave oven to heat liquid carbon dioxide

Which is measured using a calorimeter

5) Solid lithium metal is added to an aqueous solution of magnesium chloride forming lithium chloride solution and solid magnesium a. If you begin the reaction with 15.0 g of lithium and 25.

Which element easily loses one electron to form a positive ion? A. Magnesium (Mg) B. Lithium (Li) C. Nitrogen (N) D. Fluorine (F)

What is an indication a chemical reaction has occurred? A.) Formation of gas B.) Boiling of a substance C.) Melting of a substance D.) Freezing of a substance

A saline solution contains 1.6 % NaCl by mass. How much NaCl is present in 57.2 g of this solution?