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ValentinkaMS [17]
2 years ago
14

What happens when a catalyst is used in a reaction?.

Chemistry
1 answer:
den301095 [7]2 years ago
6 0
A catalyst is a substance that increases the rate of a chemical reaction by lowering the activation energy without being used up in the reaction. After the reaction occurs, a catalyst returns to its original state and so catalysts can be used over and over again.
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In Europe, gasoline efficiency is measured in km/L. If your car’s gas mileage is 25.0 mi/gal, how many liters of gasoline would
Deffense [45]

Answer:

V=23.5L

Explanation:

Hello,

In this case, it is convenient to compute the car's mileage in km/L as follows:

25.0\frac{mi}{gal}*\frac{1km}{0.6214mi}*\frac{1gal}{3.78L}=10.64\frac{km}{L}

In such a way, since the distance is measured to be 250 km, the volume requirement is:

V=\frac{250km}{10.64kg/L}\\ \\V=23.5L

Regards.

7 0
3 years ago
What are the hydrocarbon names?
IceJOKER [234]

Answer:

Carbon    Prefix       Structure

1          Methane       CH4

2         Ethane        CH3CH3

3         Propane   CH3CH2CH3

4         Butane   CH3(CH2)2CH3

5         Pentane  CH3(CH2)3CH3

6         Hexane   CH3(CH2)4CH3

7         Heptane   CH3(CH2)5CH3

8         Octane    CH3(CH2)6CH3

9         Nonane     CH3(CH2)7CH3

10        Decane      CH3(CH2)8CH3

11        Undecane     CH3(CH2)9CH3

12       Dodecane     CH3(CH2)10CH3

Explanation:

7 0
3 years ago
Explain what is wrong with this balanced chemical equation and write the correct equation.
WINSTONCH [101]

Answer:

Zn(s)+ 2 HCl(aq)➡️ ZnCl2 (aq) + H2(g)

Explanation:

Your chemical equation can be simplified....

3 0
4 years ago
A sample of a gas at 25°C has a volume of 150 mL when its pressure is 0.947 atm. What will the temperature of the gas be at a pr
sertanlavr [38]

Answer: The temperature of the gas at a pressure of  0.987 atm and volume of 144mL is 25.16^0C

Explanation:

The combined gas equation is,

\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}

where,

P_1 = initial pressure of gas = 0.947 atm

P_2 = final pressure of gas = 0.987 atm

V_1 = initial volume of gas = 150 ml

V_2 = final volume of gas = 144 ml    

T_1 = initial temperature of gas = 25^0C=(25+273.15)K=298.15K

T_2 = final temperature of gas = ?

Now put all the given values in the above equation, we get:

\frac{0.947\times 150}{298.15}=\frac{0.987\times 144}{T_2}

T_2=298.31K=(298.31-273.15)^0C=25.16^0C

The temperature of the gas at a pressure of  0.987 atm and volume of 144mL is 25.16^0C

4 0
3 years ago
Help plz? <br> explain what is sorted sediment. why does it occur?
LuckyWell [14K]

Answer:

Particles become sorted on the basis of density, because of the energy of the transporting medium. High energy currents can carry larger fragments. As the energy decreases, heavier particles are deposited and lighter fragments continue to be transported. This results in sorting due to density.

Explanation:

5 0
3 years ago
Read 2 more answers
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