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Reika [66]
3 years ago
6

I NEED HELP ON EARTH SCIENCE !!!!!

Chemistry
2 answers:
Cloud [144]3 years ago
8 0
Where is the assignment?? OR worksheet
il63 [147K]3 years ago
6 0
What kind of problem

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Which of the following months would be the darkest at the South Pole?
son4ous [18]

Answer:

December.

Explanation:

6 0
3 years ago
How many molecules of CF₂Cl₂ are in 45.7 grams of CF₂Cl₂? (Show work)
posledela

Answer:

The answer to your question is: 2.20 x 10 ²³ molecules

Explanation:

Data

mass = 45.7 g

molecules of CF₂Cl₂ = ?

Process

1.- Calculate the mass number of CF₂Cl₂

   C = 12    F =2 x 19    Cl = 2 x 35.5

   total = 12 + 38 + 71

   total = 121 g

2.- Use the Avogradro's number to solve the problem

                       121 g -------------------  6.023 x 10²³ molecules of CF₂Cl₂

                        45.7 g ---------------     x

                        x = (45.7 x 6.023 x 10²³) / 121

                        x = 2.75 x 10²⁵ / 121

                        x = 2.20 x 10 ²³ molecules

4 0
3 years ago
What the oxidation state of sulfur in sulfite?
RUDIKE [14]

Answer:

+4

Explanation:

SO^{-2} _{3} , Oxygen always works with -2. You multiply with the number of atoms -2*3= -6

S=x+(-6)=-2

x-6=-2   -> x= -2+6  -> x= +4

4 0
3 years ago
Read 2 more answers
The electrons that are in the outermost electron shell, also known as the ____________ , have ____________ energy than those in
Tamiku [17]
The electrons that are in the outermost electron shell, also known as the valence shell, have more energy then those in the inner electron shells, I hope this helps<3
8 0
2 years ago
1. How did Mosely contribute to the periodic table arrangement?
KIM [24]

Answer:

1. Mosely arranged the elements based on the increasing number of protons, atomic number.

2. According to Moseley, similar properties recur periodically when elements are arranged according to increasing atomic number. Atomic numbers, not weights, determine the factor of chemical properties. Mendeleev ordered his elements in order of their relative atomic mass, and this gave him some problems.

Explanation:

4 0
3 years ago
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