5. Based on the balanced chemical equation which of the following statements is true about the relationship between magnesium (Mg) and hydrogen gas (H2) in this reaction?
Mg(s) +2HCl (aq)->H2(g)+MgCl2(aq)

Blank allows you to do calculations for situations in which only the amount of gas is constant a)boyle's law b)combined gas law c)ideal gas law d)dalton's law

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Drug abuse will not lead to physical and psychological dependence. true or false ?