28 Which of the following compounds contains a transition metal? A. magnesium bromide (MgBr2) B. sodium chloride (NaCl) C. potassium hydride (KH) D. iron oxide (FeO)

Which compound is least soluble in water at 60.°C? (1) KClO3 (3) NaCl (2) KNO3 (4) NH4Cl

Discuss carbohydrate chemistry

What kind of animal needs to compete to get attention of a potential mate?

4. Why is cooking an endothermic process? A) Uncooked food contains more chemical energy than cooked food. B) Energy is continuously added for the chemical reactions to take place. C) The chemical reactions involved in burning fuels release energy

A compound is 57.1% oxygen and the remainder carbon. using oxygen as the standard (16 amu) and assuming a 1:1 atom ratio, calculate the relative mass of a carbon atom.

Which is the balance equation for S8+O2=SO2

Sound waves travel fastest through? A.) Air B.) Steel C.) Water D.) Vacuum

Which of the following combinations will result in a reaction that is never spontaneous? 1) positive enthalpy change and positive entropy change 2) positive enthalpy change and negative entropy change 3) negative enthalpy change and positive entropy

Which of the formed elements is present in the greatest concentration?

A compound has a percent composition of 24.74% potassium (molar mass = 39.10 g/mol), 34.76% manganese (molar mass = 54.94 g/mol), and 40.50% oxygen (molar mass = 16.00 g/mol).