Suppose you need 3.2 moles of CaO for a reaction. How many grams of CaO must you weigh out? Question 10 options:

220.07 grams of CaO

179.45 grams of CaO

0.057 grams of CaO

17.52 grams of CaO

Motivation cannot be developed with practice; a person either possesses it or they do not.

An alkaline battery produces electrical energy according to the following equation. zn(s) + 2 mno2(s) + h2o(l) zn(oh)2(s) + mn2o3(s) (a) determine the limiting reactant if 17.5 g zn and 31.0 g mno2 are used. (type your answer using the format ch4 for ch4.) (b) determine the mass of zn(oh)2 produced. _ g

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line