Write ionic equations for any three of the following: 1. HNO3(aq) + NaOH(aq) → NaNO3(aq) + H2O(l)
2. HCl(aq) + KOH(aq) → KCl(aq) + H2O(l)
3. H2SO4(aq) + Mg(OH)2(aq) →MgSO4(aq) + 2H2O(l)

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Use the measurements in the table to determine which unidentified metal has the highest density. metal volume mass a 10.5 cm3 122 g b 14.2 cm3 132 g c 16.1 cm3 115 g d 12.7 cm3 126 g