How many moles of Hydrogen do you need, if you have 7.8 mol of Nitrogen? N2 + 6H2 → 2NHG
A.1.3 mol H2
B.2.63 mol H2
C.23.17 mol H2
D.46.8 mol H2

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

the answer is:  

line graphs show patterns in data with variables that change over time; whereas, circle graphs show data as parts out of a whole (such as out of 100%).

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.