while studying exothermic reactions, laura and her lab partner are instructed to add magnesium to hydrochloric acid. based on their math, the theoretical yield of magnesium chloride is 10.75 grams. they measured the mass of magnesium chloride at the conclusion of the reaction and found that 10.31 were produced. what is the percent yield?

a)104%
b)96%
c)91%
d)88%

Which function is performed by earths atmosphere? a. ultraviolet rays are prevented from reaching the ozone layer. b. earths temperature is raised and moderated by trapping in heat c. charged particles from the sun are prevented from reaching earth. d. magnetic charges from space are prevented from reaching earths surface.

Select the correct answer. which statement is true about a polarized object? o a. it gains electrons and becomes negatively charged. ob. it gains protons and becomes positively charged. oc. the number of positive and negative charges can be the same. od. it has to be a metal. o e. there is no change in the distribution of the charge in the object. reset next what

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)