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3 years ago

A catalyst:

Chemistry

2 answers:

svetlana [45]3 years ago

4 0

Answer:

Catalyst decreases activation energy

Explanation:

Consider the attached diagram and note the annotation => top of transition diagram for catalyzed reaction is lower than uncatalyzed reaction.

posledela3 years ago

3 0

Answer:

Explanation:

well, just need to remember

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“Enter the conjugate acids of no2- and no3-“

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3 years ago

What are some problems chemist must consider when developing new technologies?

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3 years ago

When water vapor changes to a liquid what is it called

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Explanation:

<h2>Condensation is the change of water from its gaseous form (water vapor) into liquid water. Condensation generally occurs in the atmosphere when warm air rises, cools and looses its capacity to hold water vapor. As a result, excess water vapor condenses to form cloud droplets.</h2>

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3 years ago

Sum of brother and sisters age is 26. Four times the brothers age is subtracted from three times the sisters age, the difference

lana66690 [7]

Answer : The ages of the brother and sister are, 10 and 16 years respectively.

Solution :

Let the age of brother be 'x' and the age of sister be 'y'

There are two equations formed which are,

x + y = 26 ..........(1)

3y - 4x = 8 ..........(2)

First we have to multiple equation (1) by 4 and then added equation (1) and (2), we get the value of 'y'.

$4x+4y+3y-4x=8+26\\\\7y=112\\\\y=16$

Now put the value of 'y' in equation (2), we get the value of 'x'

3(16) - 4x = 8

4x = 40

x = 10

The age of brother = x = 10 years

The age of sister = y = 16 years

Therefore, the ages of the brother and sister are, 10 and 16 years respectively.

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3 years ago