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nekit [7.7K]
3 years ago
13

What does the group number of A elements in the A/B numbering system)

Chemistry
1 answer:
Ivanshal [37]3 years ago
4 0

Answer:

All elements in the same A group will have the same number of

valence electrons.

Explanation:

Group A has 1 valence electrons.

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Hydrogen containing all compounds are not acts as acids. Why?
Elodia [21]

Answer:

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Explanation:

Acid = solution that split to H+ or H3O+ pH <7

The compound that can't split to H+ doesn't act as acid.

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Question 2 of 5
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C

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The answer is C because machines such as tractors and sprinklers are counted as technology, and are better examples than pesticides.

5 0
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How many moles of N2O5 are needed<br> to produce 7.90 g of NO2?
Roman55 [17]

Answer:

0.085 moles of  N₂O₅ are needed

Explanation:

Given data:

Mass of NO₂ produces = 7.90 g

Moles of N₂O₅ needed = ?

Solution:

2N₂O₅       →     4NO₂  + O₂

Number of moles of NO₂ produced :

Number of moles = mass/ molar mass

Number of moles = 7.90 g/ 46 g/mol

Number of moles = 0.17 mol

now we will compare the moles of NO₂   with N₂O₅.

                NO₂          :       N₂O₅

                  4            :          2

                0.17          :         2/4×0.17 = 0.085 mol

Thus, 0.085 moles of  N₂O₅ are needed.

4 0
3 years ago
The particle picture is best described as...
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Answer:

Both are pure substances and a compound

8 0
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When ammonium nitrate dissolves in water, the solution becomes cold.
KATRIN_1 [288]

B.

Delta G is negative and Delta S is positive.

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