Which of the following ratios are needed to determine the mass of oxygen produced from the decomposition of 10 grams of potassium chlorate? Select all that apply. 2KCIO3=2K+3O2 a. 1 mole KCIO3/ 112.55 g KCIO3

b.31.998 g O2/1 mole O2

c.3 mole O2/2 mole KCIO3

d.112.55 g KCIO3/1 mole KCIO3

Which statement correctly describes potassium iodide, ki? there is a one-to-one ratio of potassium ions to iodide ions. potassium gains electrons and iodine loses electrons during the reaction. the lattice is held together by potassium anions and iodide cations.

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride