Which of the following steps will speed up the reaction between a baking soda solution and a calcium chloride solution in a beaker? keep the beaker in a freezer. keep the beaker in sunlight. pour the solutions into a flat dish. pour the solutions into a narrow test tube.

Agas mixture with a total pressure of 745 mmhg contains each of the following gases at the indicated partial pressures: co2, 245 mmhg ; ar, 119 mmhg ; and o2, 163 mmhg . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? phe p h e = nothing mmhg request answer part b what mass of helium gas is present in a 10.2-l sample of this mixture at 283 k ? m m = nothing g request answer

The p sub shell can hold up to 8 electrons in an atom. true or false?

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from