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DedPeter [7]
3 years ago
15

The number of _____ determines which element it is.

Chemistry
1 answer:
Alenkasestr [34]3 years ago
5 0
<span>electrons hope this helps</span>
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The energy available to primary consumers in an energy pyramid is 800 kilocalories. Approximately how much energy is used by the
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4 years ago
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I need the word equation for the reaction calcium oxide and nitric acid ​
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Answer:

CaO + HNO3 = Ca(NO3)2 + H2O|

Explanation:

Nitric acid (HNO3(aq)) can be neutralized by calcium hydroxide (Ca(OH)2(aq)). Write a balanced chemical equation for the reaction between these two compounds and identify the salt that it produces.

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3 years ago
Calculate the percent of Cl in KClO4
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Answer:

25.6 %.

Explanation:

  • To calculate the % of Cl in KClO₄:

<em>% Cl = [Atomic mass of (Cl)/molar mass of KClO₄] x 100</em> = [(35.5 g/mol)/(138.55 g/mol)] x 100 = <em>25.62 % ≅ 25.6 %.</em>

7 0
4 years ago
A sample of an unknown substance has a mass of 42g and a volume of
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Density is mass over volume

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3 years ago
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Calcium carbonate decomposes according to the following equation:
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Answer:

CaCO3----------CaO+CO2

(40g+12g+16g×3) of CaCO3 produce (40g+16g) of CaO

100g of CaCO3 -----------------56g of CaO

20g of CaCO3-------------------x grams of CaO

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x=1120gg÷100g

x=11.2g of CaO

Therefore, 11.2grams of CaO from 20grams of CaCO3

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8 0
2 years ago
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