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pishuonlain [190]
3 years ago
6

An advertisement for a new fish food claims that lab studies show that fish grew three inches in three weeks while eating the fo

od. Travis wondered if the food was worth the extra cost.
Chemistry
1 answer:
damaskus [11]3 years ago
7 0

Answer: To evaluate the claim in the advertisement, Travis should look at the data for the control group to see how much the fish grew without the new food.

Explanation:

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2. The ions in an ionic compound separate from each other when
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Answer:

A. when dissolved in water

Explanation:

Water is an extremely polar molecule, meaning it has a positive end a negative end. When an ionic compound is dissolved, the positive pole of water will be attracted to the negative ion and attach itself to it. The same goes for the positive ions. That's how water breaks down ionic compounds

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3 years ago
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Calculate the ph at the equivalence point for the titration of 0.230 m methylamine (ch3nh2) with 0.230 m hcl. the kb of methylam
Vlad1618 [11]

Answer: The pH at the equivalence point for the titration will be 0.65.

Solution:

Let the concentration of [OH^-] be x

Initial concentration of [CH3NH_2], c = 0.230 M

        CH_3NH_2+H_2O\rightleftharpoons CH_3NH_3^++OH^-

at eq'm  c-x                         x                    x

Expression of K_b:

K_b=\frac{[CH_3NH_3^+][+OH^-]}{[CH_3NH_2]}=\frac{x\times x}{c-x}=\frac{x^2}{c-x}

Since ,methyl-amine is a weak base,c>>x so c-x\approx c.

K_b=\frac{x^2}{c}=5.0\times 10^{-4}=\frac{x^2}{0.230 M}

Solving for x, we get:

x=1.07\times 10^{-2} M

Given, HCl with 0.230 M , it dissociates fully in water which means [H^+] = 0.230 M

[OH^-]=[H^+] will result in neutral solution, since [OH^-]

Remaining [H^+] after neutralizing [OH^-]ions

[H^+]_{\text{left in solution}}=[H^+]-[OH^-]=0.230-1.07\times 10^{-2}=0.2193 M

pH=-log{[H^+]_{\text{left in solution}}=-log(0.2193)=0.65

The pH at the equivalence point for the titration will be 0.65.

8 0
3 years ago
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Ymorist [56]
C a scientist because they would be the ones who are most qualified to do the experiment and get accurate results
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3 years ago
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How to knof if d orbital is paramagnetic?
Agata [3.3K]
<span>Write down the electron configuration.Draw the valence orbitals.Identify if unpaired electrons exist.<span>Determine whether the substance is paramagnetic or diamagnetic.</span></span>
5 0
3 years ago
Calculate the mass if a substance has a density of 2.0 g/mL and a volume of 22 mL.
Nat2105 [25]

Answer:

Explanation:

Density = mass/ Volume

2 g/mL x 22 mL = mass

44 g = mass

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3 years ago
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