Pretty sure it is Block A:)
Answer: There no chemical change, but there is a physical change.
Reason: When a substance dissolves in water, the substance retains its molecular identity and simply mixes throughout the water
Explanation:
Chemical properties are those properties that tells us about what a substance can do as regards to whether or not the substance reacts with other substances.
- Chemical properties are a function of the electrons contained in an atom and how they interact with other atoms.
- Examples of chemical properties are:
- Flammability
- Rusting of iron
- Precipitation
- Decomposition of water by an electric current
Learn more:
Chemical change brainly.com/question/9388643
#learnwithBrainly
Sodium phosphide is the inorganic compound with the formula Na3P.
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.
