How many moles of dipyrithione contain 8.2 x 10^24 atoms of N

1 answer:

4 0

Dipyrithione has the chemical formula C₁₀H₈N₂O₂S₂, indicating that there are two (2) nitrogen atoms in each molecule. Utilizing dimensional analysis alongside Avogadro's number, which is 6.022 x 10²³, we arrive at the following solution: n = (8.2 x 10²⁴ atoms N)(1 molecule dipyrithione/2 atoms of N)(1 mole dipyrithione/6.022 x 10²³ molecules dipyrithione). Simplifying yields n = 6.8 moles dipyrithione. ANSWER: 6.8 moles.

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Select the atoms or ions drawn with valid Lewis dot structures. A) A carbon has a dot on top, right, bottom and to the left.a ni

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Answer:

B, C

Explanation:

The Lewis dot structures that are valid are for B and C.

Regarding A;

The Lewis representation of carbon is correct. Each of the four dots symbolizes the four valence electrons.

However, the nitrogen with a single dot above, to the left, and below and a -3 charge isincorrect. For it to have a -3 charge, it must possess 8 Lewis dots (two on each side).

The nitrogen showing four dots (on top, right, bottom and left) is incorrect.

In B;

An oxygen having two dots positioned above and below with one dot on both sides is correct , as the 6 dots indicate oxygen's valence electrons.

In C;

A carbon shows two dots at each position and has a charge of +4. This is correct because the charge reflects that it has gained four electrons giving it 8 valence electrons.

In D;

An oxygen shows two dots above, to the left and below, with a charge of -2. This is incorrect as not all Lewis dots are present. Two are missing.

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lorasvet [2795]

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