A testable explanation that's supported or refuted is called an

How many grams of CaF2 would be needed to produce 1.23 moles of F2?

How is the atomic theory that is accepted today different from daltons atomic theory?

What functional group contains a nitrogen atom and an oxygen atom

Mass defect for oxygen-16 = 0.13261 amu How many kilograms does the mass defect represent? 1.66 * 10-27 kg 2.20 * 10 - 28 kg 3.0 * 108 kg 8.24 x 1025 kg

A physical change in matter is a change in size and shape, (through cutting, breaking, or grinding), or state, (through melting, boiling, freezing, evaporating, and condensing). True Or False

Detectors in the walls of four containers (A-D) count the number of collisions between gas molecules and the surfaces of the containers. The detectors count 10, 15, 20, and 30 collisions per second for containers A, B, C, and D, respectively.

Oxygen, hydrogen, and water are substances. which of these substances are elements

Water has what type (s) of properties? a. physical onlyB. chemical onlyC. physical and chemical

1. Determine which object will SINK or FLOAT in water. Block #1 (3.2 g/mL) A. Sink Block #2 (0.02 g/mL) B. Float _Block #3 (0.98 g/mL) Block #4 (1.2 g/mL) Block #5 (2.4 g/mL)

The correct symbol for the ion formed by nitrogen is: