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kogti [31]
3 years ago
9

What of the following is the BEST statement about dependent and independent variables?

Chemistry
2 answers:
solmaris [256]3 years ago
8 0
Answer is the first one
Sonbull [250]3 years ago
3 0
1. A dependent variable is a factor that changes because of procedures conducted on the independent variable.
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Answer:

national

Explanation:

I don't understand, I'm sorry

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What is the current in the 30 ohm heating coil of a coffee maker that operates on a 120 volt circuit?
SpyIntel [72]

Answer:

4Amps. i can't see other questions clearly

Explanation:

using  ohms law  \\ v = ir

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I=V/R

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meriva
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3 years ago
Two aqueous solutions are prepared: 1.00 m Na2CO3 and 1.00 m LiCl. Which of the following statements is true?
svlad2 [7]

Answer:

The Na_{2}CO_{3} solution has a higher osmotic pressure and higher boiling point than LiCl solution.

Explanation:

As concentrations of two aqueous solutions are same therefore we can write:

                                \Delta P\propto i , \Delta T_{b}\propto i and \pi \propto i

where \Delta P, \Delta T_{b} and \pi are lowering of vapor pressure, elevation in boiling point and osmotic pressure of solution respectively. i is van't hoff factor.

i = total number of ions generated from dissolution of one molecule of a substance (for strong electrolyte).

Here both Na_{2}CO_{3} and LiCl are strong electrolytes.

So, i(Na_{2}CO_{3})=3 and i(LiCl)=2

Hence, lowering of vapor pressure, elevation in boiling point and osmotic pressure will be higher for Na_{2}CO_{3} solution.

Therefore the Na_{2}CO_{3} solution has a higher osmotic pressure and higher boiling point than LiCl solution.

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Explanation:

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