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Naddika [18.5K]
3 years ago
14

13 : 22

Chemistry
1 answer:
nikklg [1K]3 years ago
4 0

Answer:

C

Explanation:

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1. How is the number of energy levels in an atom related to the period number?
Natalka [10]

Answer:

The highest energy level number (1 through 7) for the electrons in an atom corresponds to the period (or row) in the periodic table to which that atom belongs. Because there are 7 periods in the table, there are 7 energy levels. For example, hydrogen (H) is in the first period, so it has only one energy level.

4 0
3 years ago
What mass of sugar and water is needed to make 40 g of 10% solution?​
brilliants [131]

Answer:16g

Explanation:A solution's percent concentration by mass,

% w/w

, basically tells you what mass of solute you get per

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7 0
3 years ago
What is the molar mass of Pb(SO4)2? Explain how you calculated this value.
solong [7]
Hope this helps you!

3 0
3 years ago
0.75 moles of an unknown acid are dissolved in water. If 0.42 moles of H3O+ form, what was the percent dissociation of the unkno
AnnZ [28]

Answer:

56 %

Explanation:

The percent dissociation of a weak acid can be defined as:

Moles of weak acid that produced H₃O⁺ species / Total number of weak acid moles * 100%

We are given all the required data to <u>calculate the percent dissociation</u>:

0.42 mol / 0.75 mol * 100 % = 56 %

The percent dissociation is 56%.

3 0
3 years ago
Name the following compound: HNO3 Hydrogen nitrate Hydrogen nitrite Nitric acid Nitrous acid
wariber [46]

The compound HNO3 is called nitric acid.

HNO3 is a covalent compound and  a strong acid which ionizes in water into H+ (proton) and NO3- (nitrate ion).

HNO3 (aq) ↔ H+(aq) + NO3-(aq)

Ans: HNO3 = Nitric Acid

[On a side note: Nitrous acid is HNO2]

7 0
3 years ago
Read 2 more answers
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