Which statement about Kepler's work is FALSE? He proposed two laws of planetary motion
He used mathematics to support his work
He described that the orbits of planets are not perfect circles
He described that the Earth is not always the same distance from the sun

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

The reactions shown here can be combined to make the overall reaction c(s) + h2o(g) ⇌ co(g) + h2(g) by reversing some and/or dividing all the coefficients by a number. a. c(s) + o2(g) → co2(g) k=1.363×10^69 b. 2 h2(g) + o2(g) → 2 h2o(g) k=1.389×10^80 c. 2co(g) + o2 (g) → 2 co2(g) k=1.477×10^90

Avariable that is not being directly tested during an experiment should be