Please help me I need these answers

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

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

If i had 2 m naoh solution, what does the 2 m stand for? 2 molar, but 2 of a solute in 1