1. A sample of oxygen gas is contained in a piston with a freely moving cylinder. At 2°C the volume of the gas is 575 mL. To what temperature in °C must the gas be heated
to occupy a volume of 987 mL?

What is the result of multiplying (2.5 × 1010) × (2.0 × 10-7)? a. 5.0 × 103 b. 5.0 × 10-3 c. 5.0 × 1017 d. 5.0 × 10-17

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit