6 Select the correct answer.
Nitrogen (N) and hydrogen (H) react with each other to produce ammonia (NH3). This reaction is shown in an equation as N2 + 3H2 - 2NH3.
What is the ratio of nitrogen atoms to hydrogen atoms in ammonia?
OA. 1 to 2
OB. 1 to 3
OC. 2 to 1
OD. 2 to 3
OE. 3 to 1
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OE. 3 to 1

For example, the compound ammonia always has three hydrogen atoms for every nitrogen atom. This is a 3 to 1 ratio of hydrogen to nitrogen. This same 3:1 ratio holds for every sample of ammonia, under all physical conditions.

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

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.