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Minchanka [31]
4 years ago
8

What happens to a catalyst in a reaction?

Chemistry
1 answer:
earnstyle [38]4 years ago
8 0
The correct answer is A :)
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Somebody please answer
Zepler [3.9K]

Answer:

177 mmHg

Explanation:

Given that:

The sample of  a gas is with Pressure (1) P_1 = 500 mmHg

The initial temperature T_1 = 773 K

The final temperature T_2 = 273 K

Using ideal gas equation:

\dfrac{P_1}{T_1} = \dfrac{P_2}{T_2} \\ \\  \dfrac{500}{773} = \dfrac{P_2}{273} \\ \\  (136500) = 773 \times P_2 \\ \\ P_2 = \dfrac{136500}{773} \\ \\  P_2 = 176.58 \ mmHg \\ \\  \simeq 177 mmHg

7 0
3 years ago
Which of the following is an example of very early scientific research?
goldenfox [79]

Answer:

banging rocks together to see which make make a spark and create fire painting pictures is an example of art and sleeping in caves is survival

7 0
4 years ago
Why do all atoms of an element have the same atomic number, although they may have different mass numbers?. What do we call atom
3241004551 [841]
The isotopes of an element differ in the number or neutrons whereas the number of protons or electrons of a neutral atom stays the same. The molar mass of the element is based on the percent abundances of different isotopes and the individual molar mass of each isotope. 
7 0
3 years ago
Which method is appropriate for separating a mixture of iron and aluminum? A. using a magnet B. distillation C. evaporation D. o
sladkih [1.3K]
Appropriate method for separating a mixture of iron and aluminum is definitely <span>A. using a magnet. If we use the second method we will </span>vaporize either aluminum or iron.
If we used the third method it <span> would  change liquid into a gas which is strange according to the task.
</span>And observing (even for a long time) won't help separating. 

7 0
3 years ago
“The allele that can only be seen when two copies of it are present”
Illusion [34]

Answer:

Recessive

Explanation:

I don't know how to give an explanation but I learned this a few years back and it stuck with me.

8 0
3 years ago
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