When magnesium (mg) metal is placed in hydrochloric acid (hcl), it forms magnesium chloride (mgcl2) and a gas. what gas is formed in this reaction?

Solid samples of the element phosphorus can be white, black, or red in color. The variations in color are due to different (1) atomic masses (2) molecular structures (3) ionization energies (4) nuclear charges

What is the similarity between the first two columns of the periodic table?

Which of the following is not part of daltons atomic theory

A teacher wants to prepare a 0.010 ppm solution of arsenic pentoxide in the laboratory for calibrating a water quality testing system. If the teacher uses 500.0 mL of water (which has a mass of 500.

Which two nuclei are fused in a thermonuclear weapon? a. hydrogen and tritium c. carbon-13 and deuterium b. tritium and deuterium d. None of the above

Which of the following is fact-based science rather than part of a belief system a. astrology b. paranormal investigation c. chemistry d. philosophy e. cultural rituals

Meanders form when a river flows across bedrock? true or false

Tank a contains a mixture of 10 gallons water and 5 gallons pure alcohol. tank b has 12 gallons water and 3 gallons alcohol.

Why won't water reform to an ice cube if you freeze it?

For what reasons can a theory be changed