Answer:
C8H8O2
Explanation:
The molecular formula of a compound is simply a multiple of the empirical formula as shown below:
Molecular formula => [C4H4O]n
From the question given, we were told that molar mass of the compound is 136g/mol. This implies that:
[C4H4O]n = 136
Now, let us find the value of n in order to obtain the desired result. This is illustrated below:
[C4H4O]n = 136
[(12x4) + (4x1) + 16]n = 136
[48 + 4 + 16]n = 136
68n = 136
Divide both side by the coefficient of n i.e 68
n = 136/68
n = 2
Therefore the molecular formula is
=> [C4H4O]n
=> [C4H4O]2
=> C8H8O2
13000 liters, 0.000012 cm3 or ml or cc
Using p1v1/t1=p2v2/t2
p1=175kpa
p2=215kpa
v1=19l
v2=?
t1=25+273=298
t2=30+273=303
175x19/298=215xv2/303
8.808x303=215v2
2669/215=v2
v2=12.4l
<span>The
statement ‘A car requires brakes in order to stop’ follows Newton’s first law
of motion: the Law of Inertia. The car will stop if there is a brake. This is
similar to the first law wherein an object stays at rest unless a force is
acted upon it.</span>
My solving is a bit messy tho....HOPE I HELPED