Calculate the number of nitrogen atoms in a 140 g sample of dinitrogen tetroxide . Be sure your answer has a unit symbol if necessary, and round it to significant digits.

What metric units would you use to measure the thickness of a key

As we move from left to right across the periodic table, what is the general trend? a) atomic radii increase. b) electronegavitiy decreases. c) nuclear shielding increases. d) metallic character decreases.

F1.5 mol of nabh4 react, how many moles of b2h6 are formed? 2 nabh4(aq) + h2so4(aq) → 2 h2(g) + na2so4(aq) + b2h6(g)