Which of the following contains a polar covalent bond?
A. NO
B. 02
C. NaCl
D. Na(s)

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

Given the following equation: 2a1 + 3mgcl2 --> 2alcl3 + 3mg how many moles of aluminum chloride are produced from 2.5 moles of magnesium chloride?