Given that 1 inch (in) = 2.54 cm, 1285 cm2 = ________ in2.

Given the following reactions and their

What is the mass of ZnSO4 (molar mass: 161.47 g/mol) needed to prepare 250.0 mL of 1.80 M ZnSO4 solution?

In general, stronger bond has a _______ bond length and a ________ bond enthalpy.

Calculate the change in the internal energy of a system when it releases 140 J of heat to the surroundings and does 85 J of work on the surroundings at the same time.

What is the ground-state electron configuration of copper (Cu) atom?

When the equation below is properly balanced with the smallest set of whole numbers, the coefficient in front of O2 is __________. NH3 + O2   → NO  +  H2O2  

How many moles of iron (Fe) are in 88.63 g of Fe3O4 (molar mass: 231.53 g/mol)?

How many carbon atoms are in 20.0 g of C3H6 (molar mass: 42.08 g/mol)?

What is the valence electron configuration of In (element #49)?