Which of the following is an example of velocity? a: 50 mph east b: 100 mph c: 100 miles east d: 25 east

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?

Asample of hydrated tin (ii) chloride (sncl2) has a mass of 4.90 g. when it is dehydrated, it has a mass of 4.10 g. which is the correct chemical formula for the hydrate? sncl2•2h2o          sncl2•4h2o          sncl2•6h2o