What is the correct scientific notation representation of 493.98?

What is the name of Fe(NO3)3?

What is the answer to the following question using the correct number of significant figures? 130.92 / 10.91 = ?

What charge will the ion formed from a potassium (K) atom have?

What is the answer to the following question using the correct number of significant figures? 991.87 / 13.97 = ?

You find that the mass of an object is 0.250 kg. How many grams is this?

What is the formula for hydrofluoric acid?

What is the common name of N2H4?

What is the name of the acid, H3PO3?

What is the name of CaCl2 · 2 H2O?