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ValentinkaMS [17]

2 years ago

14

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

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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If you have 1.00 mole of F2 at 1.00 atm of pressure and 0°C, what is the volume of F2?

ss7ja [257]

Answer:

$V=22.4L$

Explanation:

Hello,

In this case, by using the ideal gas equation, er can compute the volume of fluorine gas as shown below:

$PV=nRT\\\\V=\frac{nRT}{P}=\frac{1mol*0.082\frac{atm*L}{mol*K}+(0+273)K}{1.00atm} \\\\V=22.4L$

Best regards.

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When Earth is between the Moon and the Sun, how is the Moon seen?

AVprozaik [17]

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Of the concentration units below, only ________ uses kg of solvent in its calculation.

oksano4ka [1.4K]

Answer:

E) molality

Explanation:

Molality -

Molarity of a substance , is the number of moles present in a Kg of solvent .

Hence , the formula for molality is given as follow -

m = n / s

m = molality

s = mass of solvent in Kg ,

n = moles of solute ,

Hence , from the given information of the question,

The concentration unit which have Kg of solvent , is molality.

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3 years ago

Name the three types of scientific investigations, and briefly describe each.

Oksi-84 [34.3K]

Descriptive, Comparative, and experimental.

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A 4.190 g sample of an oxide of chromium contains 2.179g of chromium, what is its empirical formula?

jeka57 [31]

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