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Tanya [424]
2 years ago
11

Denise heard that little children will pick food based on color. So she offered 100 kindergarteners colored mashed potatoes for

lunch - red, yellow, green and blue. She recorded how many students selected each color.
What is the dependent variable?

A
Regular, white mashed potatoes.

B
The number of students choosing each color.

C
The color of the mashed potatoes.

D
The age of the students.
Chemistry
1 answer:
Dvinal [7]2 years ago
7 0

Answer:

I think the answer is B. the number of students choosing each color.

Explanation:

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Explanation:

Since HF is a weak acid, the use of an ICE table is required to find the pH. The question gives us the concentration of the HF.

HF+H2O⇌H3O++F−HF+H2O⇌H3O++F−

Initial0.3 M-0 M0 MChange- X-+ X+XEquilibrium0.3 - X-X MX M

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6.6×10−4=x20.3−x6.6×10−4=x20.3−x

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0=x2+6.6×10−4x−1.98×10−40=x2+6.6×10−4x−1.98×10−4

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x=−6.6×10−4±(6.6×10−4)2−4(1)(−1.98×10−4)−−−−−−−−−−−−−−−−−−−−−−−−−−−−√2x=−6.6×10−4±(6.6×10−4)2−4(1)(−1.98×10−4)2

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