Answer:
You are on the right track.
Explanation:
Indeed, your approach here will be to use the molar mass of aluminium hydroxide to convert the mass of the sample to moles and the mole ratio that exists between the two reactants to find the number of moles of hydrochloric acid consumed.
Al
(
OH
)
3
(
s
)
+
3
HCl
(
a
q
)
→
AlCl
3
(
a
q
)
+
3
H
2
O
(
l
)
The balanced chemical equation tells you that the reaction consumes
3
moles of hydrochloric acid and produces
3
moles of water for every
1
mole of aluminium hydroxide that takes part in the reaction.
So you can say that you have
0.75
g
⋅
the molar mass of Al
(
OH
)
3
1 mole Al
(
OH
)
3
78
g
⋅
the 1:3 mole ratio
3 moles HCl
1
mole Al
(
OH
)
3
=
0.029 moles HCl
−−−−−−−−−−−−−−
Since you know that the reaction produces the same number of moles of water as the number of moles of hydrochloric acid it consumes--the two chemical species have a
3
:
3
mole ratio in the balanced chemical equation--you can use the molar mass of water to say that the reaction will produce
0.029
moles H
2
O
⋅
18.015 g
1
mole H
2
O
=
0.52 g
−−−−−
The answers are rounded to two sig figs, the number of sig figs you have for the mass of aluminium hydroxide.
Explanation:
#<em>ClaratheBrainlyQueen</em>
<u>Given:</u>
Initial temperature, T1 = 20 C
Final temperature, T2 = 40 C
<u>To determine:</u>
The temperature change
<u>Explanation:</u>
Convert degree C to Kelvin
Temperature in Kelvin = degree C + 273
T1 = 20 + 273 = 293 K
T2 = 40 + 273 = 313 K
Incremental temperature change = T2 - T1 = 313-293 = 20 K
Ans: The temperature change in kelvin is 20 K
Answer:
salt will form bcz when acids reacts with base then it forms salts . and this reaction is called neutralization reaction
Answer:
indeed it 1s22s22p63523p645230104p5 is bromine
Answer:
the answer is tetahedal and the next one is trigonal pyramidal
Explanation:
