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shutvik [7]
3 years ago
15

What kind of thermochemical equation is represented below?

Chemistry
1 answer:
ryzh [129]3 years ago
6 0
The  kind  of  thermochemical  equation  represented  below 

that  is
CaO(s)  + H2O (l)  =  Ca(OH)2 (s)  +65.2  kj

is exothermic  (  answer  B)
  This  is  because  its  heat  energy  has  a  +  sign  meaning  that  heat  is  released  by  the  reaction  above.
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A gas at constant temperature is enclosed in a container with a movable piston. It occupies a space of 10L at a pressure of 500
Liula [17]

Answer:

4.17L

Explanation:

V1 = 10L

V2 =?

P1 = 500torr

P2 = 1200torr

Boyle's law states that at constant temperature, the volume of a gas is inversely proportional to its pressure.

P1V1 = P2V2

V2 = ( P1 * V1 ) / P2

V2 = 4.17L

The new volume of the gas is 4.17L

8 0
3 years ago
Diffrentiate between electrolyric cells and galvanic cells
Scilla [17]
The different is that the galvanic cell converts chemical energy into the electrical energy and the electrolytic cell coverts electrical energy into chemical energy
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2 years ago
The type of neuron that carries impulses from the brain are...​
jek_recluse [69]
It’s Sensory Neurons!
5 0
3 years ago
Determine the empirical and molecular formula:
Bingel [31]

Answer:

The empirical formula = molecular formula = C13H18O2

Explanation:

in 100% compound we have 75.6 % Carbon ( Molar mass = 12g/mole), 8.80% hydrogen ( Molar mass = 1.01 g/mole) and 15.5% Oxygen (Molar mass = 16.01 g/mole).

Carbon: 75.6g / 12 = 6.29

Hydrogen: 8.80/ 1 = 8.80

Oxygen: 15.5/ 16 = 0.97

⇒0.97 is the smallest so we divide everything through by 0.97

C: 6.29 / 0.97 =  6.48 ≈ 6.5

H: 8.80 /0.97 = 9

O: 0.97 / 0.97 = 1

To get rid of decimals, we multiply by 2  

C: 6.5 x 2 = 13

H: 9 x 2 = 18

O: 1 x 2 = 2

The empirical formula = C13H18O2

13x 12g/mol + 18x1g/mol  + 2x 16g/mol = 156 + 18 + 32 = 206g/mol  which is the molar mass of ibuprofen

The empirical formula = molecular formula = C13H18O2

6 0
3 years ago
If aluminum has a mass of 22.3 g, how many liters of oxygen gas are required at STP?
IceJOKER [234]

Answer:

27.8

Explanation:

6 0
2 years ago
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