Answer:
it is
Step-by-step explanation:
The number of moles will be simply the number of molecules divided by Avogadro's number, so
3.01
×
10
23
6.02
×
10
23
=
0.5
m
o
l
Since the molar mass of
C
O
2
is
44
g
m
o
l
−
1
, the mass of
C
O
2
will be
22
g
.
The -2 would be distributed to the x and the 4 making the equation -2x - 8. So, the answer is C.
Answer:
x^2 - 2x + 1
Step-by-step explanation:
(x-1)^2 = (x-1)(x-1)
= x^2 - x - x + 1
= x^2 - 2x + 1
80%
-
-
Let’s say the original fraction is 100/100 (this is 100%) and we decrease what the question tells us to, we then get a fraction of 15/75.
-
-
15/75 is equal to 20%.
-
-100- 20= 80%
Ok so this all about subtracting fractions this is what you want to do:
you can change 8 3/4 and 4 2/3 to have the same value and deominator
8 3/4 = 8 9/12(multiply both sides by 3)
4 2/3 = 4 8/12(multiply both sides by 4)
you do this because 12 is divisible by 3 and 4
then, subtract 4 8/12 from 8 9/12 because John is using some of the wood his dad gave him.
then subtract once again, taking 11/2 away from your difference.
again match the deominator of 11/2 to the deominator of your difference which should be 12. another divisible of 12 is 2 and 6.
11/2 = 66/12 = 5 6/12(multiply both the top and bottom by 6)
and start subtracting.
so John should have -1 5/12(?) wood left