When molecules slow down, they expand.

A

True

B

False

Ohanna is studying what happens to the energy as a ball rolls down a ramp. What is she studying? Check all that apply. gravitational potential energy electrical energy kinetic energy mechanical energy elastic potential energy

Pure gold has a density of 19.3 g/cm3.

A solution of ammonia has a pH of 11.8. What is the concentration of OH - ions in the solution? Useful formulas ...

What element never forms doubl and triple bonds

What is the maximum number of electrons that can occupy the hydrogen-like atomic orbitals defined by the quantum numbers: n-3, l2? (A) 2 (B) 6 (C) 10 (D) 14

A scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. Does this result support the theory of plate tectonics? Why or why not?

Why is it incorrect to balance a chemical equation by changing the subscripts?

A solution of CuSO4 is labelled 0.01 M. How much CuSO4 in grams, must be used to make 1 liter of solution? A) 1.120 g B) 1.595 g C) 1.6 g D) 15.0 g

Rank the following elements according to their ionization energy: tin krypton antimony arsenic

Water (3030 g) is heated until it just begins to boil. If the water absorbs 5.49*105 J of heat in the process, what was the initial temperature of the water?