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maxonik [38]
4 years ago
7

I just need help with numbers 1 and 2 please!

Chemistry
1 answer:
scoundrel [369]4 years ago
7 0

1)Density is a physical property because its measurement or observation does not alter the chemical composition of a substance. 

6)Yes

8)A characteristic property is a chemical or physical property<span> that helps identify and classify substances.</span>

<span>The rest are correct</span>


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4. True or False. The longer a wire the greater its resistance.<br> O<br> True<br> False
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Answer:

TRUE

Explanation:

The total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be.

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What is the difference between polyatomic and monatomic compounds??
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Monatomic ions are made up of only one atom per ion, whereas polyatomic ions are made up of numerous atoms per ion.

Explanation:

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I really need help with my science homework
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I can help, pm me and i will help you on there if that's alright?
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The higher the entropy the better the change of solution formation. True or False?
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3 years ago
Which of the following item(s) explain the differences between the Ka values. Choose one or more: A. The oxidation state for oxy
Allisa [31]

Answer:

<em>C. The electron-withdrawing fluorine atoms pull electron density from the oxygen in trifluoroacetate. The negative charge is more stabilized in trifluoroacetate by this effect.</em>

<em></em>

Explanation:

<em>The structures of trifluoroacetate and acetic acid are both shown in the image attached.</em>

<em>The trifluoroacetate anion (CF3CO2-), just like the acetate anion has in the middle, two oxygen atoms.</em>

<em>However, in the trifluoroacetate anion, there are also three electronegative fluorine atoms attached to the nearby carbon atom attached to the carbonyl, and these pull some electron density through the sigma bonding network away from the oxygen atoms, thereby spreading out the negative charge further. This effect, called the "inductive effect" stabilizes the anion formed,the trifouoroacetate anion is thus more stabilized than the acetate anion.</em>

<em>Hence, trifluoroacetic acid is a stronger acid than acetic acid, having a pKa of -0.18.</em>

<em></em>

<u><em>Hope this helps!</em></u>

<u><em>Please mark brainliest!</em></u>

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3 years ago
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