How are oxidation states of transition metals indicated in the names of metal compounds? A. Prefix are used to indicate oxidation states.
B. ROman numerals are used to indicate oxidation states.
C. GRoup numbers are used to indicate oxidation states.
D. SUscripts are used to indicate oxidation states.

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

The zinc within a copper-plated penny dissolves in hydrochloric acid if the copper coating is filed down in several spots (so that the hydrochloric acid can reach the zinc). the reaction between the acid and the zinc 2h+(aq)+zn(s)→h2(g)+zn2+(aq) . when the zinc in a certain penny dissolves, the total volume of gas collected over water at 25 °c is 0.947 l at a total pressure of 743 mmhg . (vapor pressure of water is 23.78 mmhg at 25 °c .) what mass of hydrogen gas is collected? answer in appropriate significant figures

Which of the following volumes is the smallest? a) one microliter b)one deciliter d)one liter c)one milliliter