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Alenkinab [10]
3 years ago
9

Add the polynomials (7x^3-2x^2-12)+(3x^3-8x^2+10x)

Chemistry
1 answer:
laiz [17]3 years ago
4 0

Answer:

10 x ^3 − 10 x ^2 + 10 x − 12

Explanation:

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The periodic table tells you how many grams are in a mole of atoms of any
svetlana [45]

Answer:

I believe it is B. molar mass...

Explanation:

Hope this is right!

3 0
3 years ago
What is the total number of electrons in As-3?
V125BC [204]

Answer:

Arsenic, As, has atomic number 33, which is the number of protons in the nuclei of its atoms. A neutral As atom would also have 33 electrons. The electron configuration of a neutral arsenic atom is [Ar]3d104s24p3

Explanation:

5 0
3 years ago
The average mass of a nitrogen atom is 14.006 amu from the two isotopes with the following data: 14N-14.00307 amu with 0.9963 fr
Nesterboy [21]

Answer:

d. 99.63% and 0.364%, respectively

Explanation:

The average mass of a nitrogen atom is 14.006 amu

14N-14.00307 amu with 0.9963 fractional abundance

1SN- 15.000108 amu with 0.00364 fractional abundance.

The relative abundance definition in chemistry is the percentage of a particular isotope that occurs in nature. The atomic mass listed for an element on the periodic table is an average mass of all known isotopes of that element.

In this problem, the fractional abundance has areaady been given. All we need to do now is convert them to percentage abundance.

14N-14.00307 = 0.9963* 100% = 99.63%

1SN- 15.000108 = 0.00364 * 100% = 0.364%

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3 years ago
Question 14 of 25
Allisa [31]

Answer:

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Q- 30. The number of grams of solute
pochemuha

Answer:

Mass by mass

Explanation:

Because it's telling only about mass in grams

6 0
3 years ago
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