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d1i1m1o1n [39]
3 years ago
5

the atoms of a certain element each contain 11 protons and 1 valence electron. what's the element and it's chemical reactivity?

Chemistry
1 answer:
Harrizon [31]3 years ago
8 0
The element Sodium (Na) has 11 protons and 1 valence electron. 
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Answer:

See explanation

Explanation:

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The less energy a wave has, the greater its amplitude. True or False
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Answer:

true

Explanation:

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A 11.97g sample of NaBr contains 22.34 % Na by mass. Considering the law of constant composition (definite proportions), how man
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<h3>Answer:</h3>

2.125 g

<h3>Explanation:</h3>

We have;

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  • % composition by mass of Na in the sample is 22.34%

We are required to determine the mass of 9.51 g of a NaBr sample.

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In this case,

  • A sample of 11.97 g of NaBr contains 22.34% of Na by mass
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A sample of 9.51 g of NaBr will also contain 22.345 of Na by mass

  • But;

% composition of an element by mass = (Mass of element ÷ mass of the compound) × 100

  • Therefore;

Mass of the element = (% composition of an element × mass of the compound) ÷ 100

Therefore;

Mass of sodium = (22.34% × 9.51 g) ÷ 100

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sp2606 [1]

Answer:

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Explanation:

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