A compound contains 40.0% carbon 6.7% hydrogen and 53.3% ...
A compound contains 40.0% carbon 6.7% hydrogen and 53.3% oxygen. If the molar mass of the compound is 180, find the molecular formula.
[H = 1, C = 12, O = 16]
CH2O
C3H6O3
C6H12O6
C6H12O3
Correct answer is C
C - 40% ; 40/12 = 3.33
H - 6.7% ; 6.7/1 = 6.7
O - 53.3% ; 53.3/16 = 3.33
C = 3.33/3.33 = 1
H = 6.7/3.33 = 2
O = 3.33/3.33 = 1
CH2O
(CH2O)n = 180
(12 + 2 + 16)~n = 180
30n = 180
n = 6
= C6H12O6
Which of the following are chemical changes? I. cooking of food II. digestion of food III...
Which of the following properties is NOT peculiar to matter? ...
An elements used in production of matches is ...
In an electrochemical cell, polarization is caused by ...
The type of reaction that is peculiar to benzene is? ...
What is the atomic number of Yttrium? ...
The general formula of alkanones is ...
What is the atomic number of Helium? ...
What does ∆H represent in the following equation ? Cl(g) + e- → CI- (g); ∆H = - 363 kJ mol-1...
which of the following elements has the highest ionization energy? ...