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LekaFEV [45]
3 years ago
14

in the reaction, Al2O3 + 6 HCl → __________H2O + 2AlCl3, what coefficient should be placed in front of H2O to balance the reacti

on?
Chemistry
2 answers:
Tamiku [17]3 years ago
6 0
You should put a 3. That way there are 6 H and 3 O on each side.
tangare [24]3 years ago
6 0
Al2O3 + 6HCl ------> 3H2O + 2AlCl3
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What is the unit used for water vapor?
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Answer:

relative humidity

Explanation:

Relative humidity can be measured with a hygrometer

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How much energy is added to change 180g of liquid water to gas at 100 degrees Celsius
Finger [1]

Answer:

40.7 kJ  

Step-by-step explanation:

The formula for the heat, q, needed to evaporate a liquid is

q = mΔHvap


<em>Data:  </em>

        m = 180 g

ΔHvap = 2260 J/g

<em>Calculation: </em>

q = 180 g × 2260 /1

q = 40 700 J = 40.7 kJ

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Chose the two factors that work together to create the global wind patterns that operate in the atmosphere.
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2 years ago
What is missing from this graph?<br><br> A. axis labels<br> B. a trendline<br> C. a title
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Axis Labels

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7 0
3 years ago
For the galvanic (voltaic) cell Fe(s) + Mn2+(aq) → Fe2+(aq) + Mn(s) (E°= 0.77 V at 25°C), what is [Fe2+] if [Mn2+] = 0.040 M and
avanturin [10]

Answer:

0.01836 M

Explanation:

Again the reaction equation is;

Fe(s) + Mn2+(aq) → Fe2+(aq) + Mn(s)

E°cell= 0.77 V

Ecell= 0.78 V

[Mn2+] = 0.040 M

[Fe2+] = the unknown

n=2

From Nernst's equation;

Ecell= E°cell- 0.0592/n log Q

0.78= 0.77 - 0.0592/2 log [Fe2+] /[0.040]

0.78-0.77= - 0.0592/2 log [Fe2+] /[0.040]

0.01/ -0.0296= log [Fe2+] /[0.040]

-0.3378= log [Fe2+] /[0.040]

Antilog(-0.3378) = [Fe2+] /[0.040]

0.459= [Fe2+] /[0.040]

[Fe2+] = 0.459 × 0.040

[Fe2+] = 0.01836 M

7 0
3 years ago
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