The gas hydrazine has the molecular formula n2h4.
hydrazine burns in air to form nitrogen gas and steam.
n2h4(g) + o2(g) → n2(g) + 2h2o(g)
which statements are correct?
1) 1 mole of hydrazine gives 72 dm^3 of gaseous products when it reacts with oxygen at room temperature and pressure.
2) the empirical formula of hydrazine is nh2.
3) the total number of atoms in 1 mole of hydrazine is 6 x the avogadro constant.
4) the volume of 1 mole of hydrazine at room temperature and pressure is 6 x 24 dm^3 .
a) 1, 2 and 3
b) 1 and 2 only
c) 2, 3 and 4
d) 3 and 4 only

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н, о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

The melting point of sulfur is 115 °c and its boiling point is 445 °c. what state would sulfur be in at 200 °c?

Which one of the following substances would be the most soluble in ccl4? na2so4 h2o ch3ch2ch2ch2oh c4h10 hi