Answer:
Explanation:
Moles of sodium
=
130
⋅
g
22.99
⋅
g
⋅
m
o
l
−
1
=
5.65
⋅
m
o
l
.
Now you have the stoichiometric equation:
2
N
a
(
s
)
+
2
H
2
O
(
l
)
→
2
N
a
O
H
(
a
q
)
+
H
2
(
g
)
↑
⏐
If there are
5.65
⋅
m
o
l
of metal, clearly
5.65
⋅
m
o
l
2
dihydrogen gas are evolved......, i.e.
2.83
⋅
m
o
l
H
2
. Typically, in a question like this, you would also be asked to calculate the volume the gas occupies under standard conditions, and the
p
H
of the resultant solution (would it be high, low, neutral?).
Answer:
yes it can
Explanation:
because, it depends on where the rock is, for example on a dessert it would Be cracked and things like that if near an eruption it would be the flamey black rock, and so on you get it
Answer:
D
Explanation:
Elements in the same group (vertical columns) have the same number of valence electrons. These elements behave similarly because they will either give up or take the same number of electrons to fill their valence shell. Since potassium has 1 valence electron, it will most likely give up one electron. Out of all of the answer options, the only element that is in the same group as potassium is francium.
It's Fluorine (non-metal) whose E.C. is 1s2, 2s2, 2p5
& Cesium (metal) whose E.C. is [Xe] 6s1
It changes when you have started pushing the rock because at that moment it has started moving
