Jack is asked to determine the number of pennies in $1.00. Jill is asked to determine the number of liters in 1 gallon. Whose answer will be an exact number, and whose answer will be measured?

The atomic number tells you the number of what in one atom of an element?

7. How many moles of H3PO4 are there in 658 grams of H3PO4?

When a specific amount of acetone (C3H6O) is added to 100.0 g of pure water at 65°C, the vapor pressure of water over the solution is lowered by 1.576 kPa. Given the vapor pressure of water at 65°C is 25.022 kPa, what is the mass of acetone added?

In the formula for water what does the subscript 2 indicate

Which of the following statements is TRUE? Which of the following statements is TRUE? Electrons placed in antibonding orbitals stabilize the ion/molecule.

The reaction rate between reactants Z and Y is proportional to the cube of [Z]. What is the rate law for this reaction?

A metal surface becomes dull because of continued abrasion. chemical or physical

What types of tissues build the digestive system?

Chemical bonds? A.) Combine compounds to form elements B.) Hold atoms together to form compounds C.) Are always covalent D.) Are always ionic

What is the smalles lt unit of copper that still maintained the characteristics of copper