Calculate how many moles of nh3 form when each quantity of reactant completely reacts according to the equation:
3n2h4(l)→4nh3(g)+n2(g)
2.6mol n2h4
4.05mol n2h4
63.8g n2h4

For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)

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Which best describes the present-day universe? opaque, expanding very slowly, stars produce heavy elements transparent, expanding at an accelerated rate, stars produce heavy elements opaque, expanding at an accelerated rate, stars produce only hydrogen and helium transparent, expanding very slowly, stars produce only hydrogen and helium