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Inessa05 [86]
3 years ago
14

Describe how revolution and year are related.

Chemistry
1 answer:
stealth61 [152]3 years ago
5 0
Revolution means to rotate around a body and a year is how long it takes earth to orbit around the sun. Hope this helps ;)
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Which of the following best describes what a catalyst does?
aleksandrvk [35]
A catalysts lowers activation energy
3 0
4 years ago
75% of the gases that make up the atmosphere are found below
Furkat [3]
Ten kilometers is e answer
5 0
4 years ago
Which isotope has the greatest number of protons?
tino4ka555 [31]

Answer:

The isotope with the greatest number of protons is:

  • <u>option D:  Pu-239, with 94 protons</u>

Explanation:

The number of <em>protons</em> is the atomic number and is a unique number for each type of element.

You can tell the number of protons searching the element in a periodic table and reading its atomic number.

Thus, this is how you tell the number of protons or each isotope

Sample       Chemical symbol  Element       atomic number   # of protons

A Pa-238       Pa                         protactinium         91                        91

B U-240         U                          uranium                 92                       92

C Np-238       Np                        neptunium            93                       93

D Pu-239        Pu                        plutonium              94                       94

8 0
3 years ago
How many grams of chlorine must be added to a balloon containing 8.00 grams of helium to double its volume?
Andrew [12]
The mole number of helium is 8/4=2 mol. Under same condition, the volume of gas is related to the mole number of the gas. So the mole number of chlorine is also 2 mol which is 142 g.
4 0
4 years ago
2. Why is it important in gravimetric analysis to add an excess amount of precipitating ions to a solution containing an analyte
Wewaii [24]

It is important in gravimetric analysis to add an excess amount of precipitating ions to a solution containing an analyte because it helps to determine the mass of the analyte.

<h3>What is Gravimetric analysis?</h3>

This is a method which is used in the determination of the quantitative determination of the ion being analyzed(analyte) based on its mass.

Adding an excess amount of precipitating ions to a solution containing an analyte will make it easier for the mass of an analyte to be determined.

It is also important for the precipitate to be a pure substance with a definite and known composition which therefore makes it the most appropriate reason.

Read more about Gravimetric analysis here brainly.com/question/6163057

#SPJ1

8 0
2 years ago
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