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3 years ago

Adding a catalyst to a chemical reaction results in

Chemistry

2 answers:

igor_vitrenko [27]3 years ago

7 0

Answer: Option (2) is the correct answer.

Explanation:

Activation energy is the minimum amount of energy required to start or initiate a chemical reaction.

Whereas a catalyst helps in increasing the energy of reactant molecules so that they can overcome activation energy barrier and actively participate in the reaction.

Hence, adding a catalyst to a chemical reaction results in a decrease in activation energy and an increase in the reaction rate.

Ksivusya [100]3 years ago

5 0

Adding a catalyst to a chemical reaction results in a decrease in activation energy and an increase in the reaction rate.

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How long it takes a 100 watt light bulb to use 10,000 J of electrical energy?

vlabodo [156]

Answer:

A 100-watt light bulb takes 100 seconds to use 10,000 J of electrical energy.

Explanation:

Power refers to the amount of work done (or energy consumed) per unit of time. It is usually measured in watts (W), which is equal to 1 Joules per second ( $\frac{J}{s}$ )

So, by definition, to calculate the power consumed or supplied in a time interval the following expression is used:

$P=\frac{W}{t}$

where P is the power measured in Watts, W is the work measured in Joules, and t is the time measured in seconds.

In this case:

P=100 Watt
W= 10,000 J
t= ?

Replacing:

$100 Watt=\frac{10,000 J}{t}$

Solving:

$t=\frac{10,000 J}{100 Watt}$

t=100 seconds

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3 years ago

Describe how a physical property such as mass or texture, can change without causing a Change in the substance

MariettaO [177]

Smashing a cake the ingredients didn't change but it's appearance did

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3 years ago

Lithium (Li) atoms have ______ orbitals.

Hoochie [10]

Answer:

there are 3 electrons in a lithium atom. Looking at the picture, you can see there are two electrons in shell one and only one in shell two.

Explanation:

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4 years ago

A piece of brass is found to have a mass of 24.32 g. When placed in a graduated cyclinder with an initial reading of 5.60 mL the

Jobisdone [24]

Answer:

$\rho=3.1g/mL$

Explanation:

Hello,

In this case, considering that the density of a body is computed given its mass and volume:

$\rho =\frac{m}{V}$

Taking into account that the mass is 24.32 g and the volume is computed via the difference between the volume of the water with the brass and the volume of water by itself as follows:

$V=13.50mL-5.60mL=7.9mL$

The density of the piece of brass turns out:

$\rho =\frac{24.32g}{7.9mL}\\\\\rho=3.1g/mL$

Best regards.

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3 years ago

What is the pH value of lithium chloride?

Fiesta28 [93]

Answer:

<h2>HERE IS YOUR ANSWER </h2>

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3 years ago