25.0 moles
12.5 moles
6.25 moles
3.125 moles
0.625 moles
Correct answer is C
Fe2O3 = 56 x 2 + 48 = 160 = 1 moles
1000gm will contain \(\frac{1000}{160}\) = 6.25 moles
Hydrogen diffuses through a porous plug
at the same rate as oxygen
at a slower rate than oxygen
twice as fast as oxygen
three times as fast as oxygen
four times as fast as oxygen
Correct answer is E
No explanation has been provided for this answer.
solid can be ground to a fine powder
density of the solid is 2.25gdm-3
solid begins to melt at 573k but is not completely melted until 648k
solid absorbs moisture from the atmosphere and turns into liquid
solid melts at 300k
Correct answer is C
No explanation has been provided for this answer.
0.5
2.0
3.0
4.0
5.0
Correct answer is D
No explanation has been provided for this answer.
C8H22O3
C6H10O3
C12H12O
C6H12O
C3H6O
Correct answer is D
carbon = 72%, hydrogen = 12%, 16%
Dividing by the atomic weight we have for C = \(\frac{5}{1}\) = 6
H = \(\frac{12}{1}\) = 12
O = \(\frac{16}{16}\) = 1
Divide by the smallest number, we have = \(\frac{6}{1}\) = 6
H = \(\frac{12}{1}\) = 12
O = \(\frac{1}{1}\) = 1
The formula is C6H12O