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2 years ago

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Chemistry

1 answer:

Dimas [21]2 years ago

3 0

Answer:

D. 34.5g

Explanation:

Using the following formula to calculate the mass of 1.5moles of sodium (Na);

Mole = mass/molar mass

Molar mass of Na = 23g/mol

mass = mole × molar mass

Mass of Na = 1.5mol × 23g/mol

Mass of Na = 34.5g

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A compound distributes between benzene (solvent 1) and water (solvent 2) with a distribution coefficient, K = 2.7. If 1.0g of th

mote1985 [20]

Explanation:

The given data is as follows.

Solvent 1 = benzene, Solvent 2 = water

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Extract = 3

Therefore, calculate the fraction remaining as follows.

$f_{n} = [1 + K_{p}(\frac{V_{S_{2}}}{V_{S_{1}}})]^{-n}$

= $[1 + 2.7(\frac{100}{10})]^{-3}$

= $(28)^{-3}$

= $4.55 \times 10^{-5}$

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= 1 - $4.55 \times 10^{-5}$

= 0.00001

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3 years ago

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Which of the following is an example of an observation?

Bess [88]

THE ANSWER TO THE QUESTION IS A

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2 years ago

A system gains 687 kJ of heat, resulting in a change in internal energy of the system equal to 156 kJ. How much work is done?

Maslowich

Answer:

w = -531 kJ

1. Work was done by the system.

Explanation:

Step 1: Given data

Heat gained by the system (q): 687 kJ (By convention, when the system absorbs heat, q > 0).

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Step 2: Calculate the work done (w)

We will use the following expression.

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2 years ago

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Answer:

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2 years ago

2 or more forces that are not equal and opposite of one another can cause change in motion

DedPeter [7]

Answer:

D unbalanced force

Explanation:

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2 years ago

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(reply w the answer or get reported) Ty if you answer this