Answer: The student should have worn splash goggles, an apron, and gloves during the investigation.
Explanation:
Answer is 355 grams.
Explanation:
Given the molecular weights:
M
r
N
a
O
H
=
40
g
m
o
l
M
r
N
a
2
S
O
4
=
142
g
m
o
l
The analogy of the moles will be held constant:
n
N
a
O
H
n
N
a
2
S
O
4
=
2
1
n
N
a
O
H
n
N
a
2
S
O
4
=
2
For each one, substitute:
n
=
m
M
r
Therefore:
n
N
a
O
H
n
N
a
2
S
O
4
=
2
m
N
a
O
H
M
r
N
a
O
H
m
N
a
2
S
O
4
M
r
N
a
2
S
O
4
=
2
200
40
x
142
=
2
200
⋅
142
40
x
=
2
200
⋅
142
=
2
⋅
40
x
x
=
200
⋅
142
2
⋅
40
=
100
⋅
142
40
=
10
⋅
142
4
=
1420
4
=
=
710
2
=
355
g
r
a
m
s
(or just use a calculator)
The study of metals and the process for refining and making things from them is called metallurgy.
Metallurgy is said to be the scientific study both of the extraction and refining process of metals from their ores.
This process includes steps such as grinding of the ore also called ore pulverization.
Ore is crushed to increase its surface area for purpose of increasing the level of its reactivity.
Sometimes, the ore is heated in the presence of oxygen to turn the ore into and oxide. This process is known as roasting.
It means the process carried by the cell is spontaneous.
