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Angelina_Jolie [31]
3 years ago
10

Which atom has only one pair of electrons in its outermost energy level?

Chemistry
1 answer:
inysia [295]3 years ago
8 0

Answer:

i belive A, i cold be wrong tho, pls tell me if im right if you fully find out

ght. Explanation:

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How many grams are in 1 mole of Ar?
Ilia_Sergeevich [38]

Answer: 39.948 grams

Explanation:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Ar, or 39.948 grams

3 0
3 years ago
A reaction occurs when one compound reacts and is broken down into different elements or simpler compounds.
Inessa [10]

Answer:

Decomposition Reaction

Explanation:

If you are referring to what type of reaction that occurred then the answer would be decomposition reaction.

This is a chemical reaction where one reactant is broken down into two or more products.

REACTANT → PRODUCT

       AB       →      A + B

The products can be two or more elements or two or more compounds, depending on what was decomposed.

3 0
3 years ago
Read 2 more answers
How many moles are in 14.35 x 1022 molecules of H3PO4?
Irina18 [472]

Answer:

0.24mole

Explanation:

Given parameters:

Number of molecules  = 14.35 x 10²² molecules;

       Unknown = number of moles of H₃PO₄

 A mole of a substance is the quantity of matter that contains the avogadro's number of particles.

 This number is given as 6.02 x 10²³ particles. The particles can be atoms, molecules, protons, electrons e.t.c

          6.02 x 10²³ molecules is contained in 1 mole of any substance

          14.35 x 10²² molecules will contain:  \frac{1.435 x 10^{23} }{6.02 x 10^{23} }   = 0.24mole

7 0
3 years ago
How many moles of water are contained in 0.250 mol of cuso4 5h2o?
Mamont248 [21]
1 mol CuSO₄·5H₂O ----------- 5 mol H₂O
0,25 mol CuSO₄·5H₂O ---- Xmol H₂O
X = 5×0,25 = 1,25 mol H₂O
3 0
3 years ago
What did sewage treatment in Ancient Rome and 19th century London have in common?
dolphi86 [110]

Answer:

The history of water supply and sanitation is one of a logistical challenge to provide clean water and sanitation systems since the dawn of civilization. Where water resources, infrastructure or sanitation systems were insufficient, diseases spread and people fell sick or died prematurely.

Explanation:

5 0
3 years ago
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