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3 years ago

PLEASE ANSWER

Chemistry

1 answer:

vodka [1.7K]3 years ago

7 0

Answer:

B. Negative association

Explanation:

Negative association is when the independent and dependent variables move in opposite directions: if the dependent variable increases, the independent variable decreases, and if the dependent variable decreases, the independent variable increases.

As you see in the diagram, as you move to the right on the horizontal axis, meaning that the independent variable is increasing, the points lie lower, meaning that the independent variable decreases.

Therefore, if you draw a line of best fit, it will have a negative slope. A negative slope indicates negative association.

The graph certainly shows association as there is a clear trend; else the points would be randomly dispersded.

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jeka57 [31]

Answer: The molality of non-electrolyte is 24.69 m

Explanation:

We are given:

Mole fraction of saturated aqueous solution = 0.310

This means that 0.310 moles of non-electrolyte is present.

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To calculate the mass from given number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

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Where,

$n_{solute}$ = Moles of solute (non-electrolyte) = 0.310 moles

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Putting values in above equation, we get:

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3 years ago

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Number of neutrons = Atomic mass number - Atomic number = 9 - 4 = 5

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Atomic mass number = 11

Atomic number = 5

Atomic number = Number of protons = Number of electrons = 5

Number of neutrons = Atomic mass number - Atomic number = 11 - 5 = 6

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Atomic mass number = 13

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