Exam number: 700634RR Exam Guidelines
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Question 1 of 20 :
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1. When determining the mass of product used or reactant consumed, the number of moles must be determined before comparing two
substances because
A. masses are the same for different substances.
OB. moles react.
O C. different substances have different masses due to their atomic make-up.
OD. atoms have the same mass but moles are different for each substance.
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12
No

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.

i think its 5049.

i hope this !