3 years ago

What statement best describes an independent variable?

1 answer:

7 0

The answer is C. The independent variable is the factor that is changed by the experimenter and impacts the dependent variable.

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How does using a jack make changing a tire easier

Nuetrik [128]

when using a jack it lifts up the car for you, giving you the ability to remove and replace a tire without the weight of the car on the tire.

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3 years ago

The value for Kw is 1.0 x 10-14 at 298K, but this value is temperature dependent. Given what you know about Kw and acid/base che

Papessa [141]

Answer:

The correct answer is option b.

Explanation:

$H_2O\rightleftharpoons H^++OH^-$

The ionic product of water : $K_w$

$K_w=[H^+][OH^-]$

A pure water has equal concentration of hydrogen ions and hydroxide ions, hence neutral.

$K_w=[H^+][H^+]=[H^+]^2$

The ionic product of water at 283 K = $K_w=0.29\times 10^{-14}$

$K_w=[H^+]^2$

$0.29\times 10^{-14}=[H^+]^2$

$[H^+]=5.385\times 10^{-8} M$

The pH of the water at 283 k;

$pH=-\log [H^+]$

$=-\log[5.385\times 10^{-8} M]=7.26$

A pure water has equal concentration of hydrogen ions and hydroxide ions,So water will e neutral at this temperature also.

The correct answer is option b.

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3 years ago

During photosynthesis, water and carbon dioxide react to form oxygen and glucose.

Debora [2.8K]

Answer:

it's answer is true

hope it helps you

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2 years ago

Zeke is on spring break. He lives in a cold climate, so he decides to drive to a warmer climate. Before he leaves for his vacati

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2 years ago

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How many reactants are there?

Nostrana [21]

Answer:

i think there would be 5!

Explanation:

brainliest pls and God bless you!!:)

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2 years ago

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