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3 years ago

What is the rate of acceleration caused by gravity?

Chemistry

1 answer:

ankoles [38]3 years ago

5 0

Answer:

The numerical value for the acceleration of gravity is most accurately known as 9.8 m/s/s.

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Ymorist [56]

Answer:

north Carolina has been the first to have a

Explanation:

nhi has a very strong sense that the company has been working with the new company for a few weeks to girl the first time you can buy the first of the new series and it is the youngest ever seen on stilts and a few more days in plants with the high quality and a lot more of the time it is on their own than they are you and the new ones that you can do with example and a few of them in plants and other than that of a variety that help you are c and a lot more likely than the other ones yyyjjbest and boy friendly way for girls in

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2 years ago

Antimony has two naturally occuring isotopes, 121 Sb and 123 Sb . 121 Sb has an atomic mass of 120.9038 u , and 123 Sb has an at

valina [46]

Answer:

Percentage abundance of 121 Sb is = 57.2 %

Percentage abundance of 123 Sb is = 42.8 %

Explanation:

The formula for the calculation of the average atomic mass is:

$Average\ atomic\ mass=(\frac {\%\ of\ the\ first\ isotope}{100}\times {Mass\ of\ the\ first\ isotope})+(\frac {\%\ of\ the\ second\ isotope}{100}\times {Mass\ of\ the\ second\ isotope})$

Given that:

Since the element has only 2 isotopes, so the let the percentage of first be x and the second is 100 -x.

For first isotope, 121 Sb :

% = x %

Mass = 120.9038 u

For second isotope, 123 Sb:

% = 100 - x

Mass = 122.9042 u

Given, Average Mass = 121.7601 u

Thus,

$121.7601=\frac{x}{100}\times 120.9038+\frac{100-x}{100}\times 122.9042$

$120.9038x+122.9042\left(100-x\right)=12176.01$

Solving for x, we get that:

x = 57.2 %

Thus, percentage abundance of 121 Sb is = 57.2 %

percentage abundance of 123 Sb is = 100 - 57.2 % = 42.8 %

6 0

3 years ago

Identify the following neutral elements by their condensed electron configurations. (Enter the chemical symbol or name of the el

Xelga [282]

Answer: [Kr] 5s1 4d10 silver

[Xe] 6s2 4f14 5d7 Iridium

[Ar] 4s2 3d10 4p4 selenium

[Kr] 5s1 4d4 niobium

[Xe] 6s1 4f14 5d10 gold

[Kr] 5s2 4d10 5p4 tellurium

Explanation:

Selenium and tellurium will have the same properties because they both belong to group 16 in the periodic table.

Silver and gold will have the same properties because they both belong the group 11 in the periodic table.

Elements having the same outermost shell configuration show similar properties since chemical reactions occur by loss or gain of electrons. This loss or gain is determined by the number of electrons occupying the outermost shell. Elements in the same group have the same outermost shell electron configuration and similar properties.

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3 years ago

All of the above

Natalka [10]

The plants without any fertiliser could be the control, to see what the change in the independent variable (fertiliser) does to the growth of the plant (dependant variable).

Hope that helps.

8 0

3 years ago

YOU WILL BE REPORTED IF THERES LINKS>>> BRAINLIEST 2.5 liters of gas is stored at a pressure of 100 atm, if the volume

Mila [183]

Answer:

a. 250 atm

Explanation:

IT MIGHT BE WRONG PLS DOUBLE CHECK

5 0

3 years ago