The thing that changes the thing that doesn't change is called the control
Answer:
it takes two hydrogen atoms for every oxygen atom to produce this reaction, so the mole ratio between hydrogen and oxygen is 2:1
Answer:
5 litres of solution are requried
Explanation:
Given that the typical units of
concentration
are
m
o
l
⋅
L
−
1
, to get
concentration
or
amount of moles
or
volume of solution
we just have to take the appropriate product or quotient.
We want
1.0
⋅
m
o
l
N
a
O
H
:
this the product
Volume of solution
×
Concentration
.
So we need the quotient:
Moles of solute
Concentration
=
1.0
⋅
m
o
l
0.2
⋅
m
o
l
⋅
L
−
1
=
5
⋅
L
.
(i.e.
1
1
⋅
L
−
1
=
1
⋅
L
)
Note that we go to such trouble in including the units in these calculations as an extra check on our arithmetic. Sometimes you ask yourself should I divide or should I multiply. Dimensional analysis answers our question. We wanted an answer in
litres
, and we got one. This persuades us that we did the calculation right.
-23 is the final answer beacuse bigger negavtives
