Different counties and schools have different grading scales.
This is the current grading scale for the county I live in.
A (93-100)
A- (90-92)
B+ (87-89)
B (83-86)
B- (80-82)
C+ (77-79)
C (73-76)
C- (70-72)
D+ (67-69)
D (64-66)
F (Below 64)
36/90*100%=40%
TRUE - Deepak Daswani
The formula shows that there are three times as many atoms of hydrogen as of nitrogen in the compound. The gram atomic masses are 1.00794 for hydrogen and 14.0067 for nitrogen. Therefore, the percent by mass of hydrogen in the compound is 100{[3(1.00794)]/[3(1.00794) + 14.0067] or 17.7553 %, to the justified number of significant digits.