According to the balanced reaction below, calculate the moles of NH3 that form when 4.2
mol of NzH4 completely reacts
3 N2H4(1)
4
NH3(g) + N2(g)

Which of the following did jj thompson discover about atoms? a)an atom has an internal structure. b) atoms are tiny indivisible particles. c)electrons orbit the nucleus of an atom. d) the nucleus of an atom contains protons and neutrons.

When the mercury level in a barometer decreases that atmospheric pressure has

Isopropyl alcohol, (ch3)2choh, is a common solvent. determine the percent by mass of hydrogen in isopropyl alcohol. a) 6.71% h b) 13.4% h c) 25.0% h d) 53.3% h