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torisob [31]
2 years ago
13

Canany one heelp me plzzzzzzz

Chemistry
2 answers:
Westkost [7]2 years ago
5 0

Answer:

She should take one

Explanation:

because it is the closest option to 1.04 and if you dont have the right dosage then you always want to take the smaller dose as opose to a bigger dose

gogolik [260]2 years ago
3 0
C) 1 because you wouldn’t want to take to many and all of the other options are to much. therefore C) 1 is the best option.
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Will give lots of points if answered correctly. Determine the kb for chloroform when 0.793 moles of solute in 0.758 kg changes t
Liono4ka [1.6K]

Answer: The value of K_{b} for chloroform is 3.62^{o}C/m when 0.793 moles of solute in 0.758 kg changes the boiling point by 3.80 °C.

Explanation:

Given: Moles of solute = 0.793 mol

Mass of solvent = 0.758

\Delta T_{b} = 3.80^{o}C

As molality is the number of moles of solute present in kg of solvent. Hence, molality of given solution is calculated as follows.

Molality = \frac{no. of moles}{mass of solvent (in kg)}\\= \frac{0.793 mol}{0.758 kg}\\= 1.05 m

Now, the values of K_b is calculated as follows.

\Delta T_{b} = i\times K_{b} \times m

where,

i = Van't Hoff factor = 1 (for chloroform)

m = molality

K_{b} = molal boiling point elevation constant

Substitute the values into above formula as follows.

\Delta T_{b} = i\times K_{b} \times m\\3.80^{o}C = 1 \times K_{b} \times 1.05 m\\K_{b} = 3.62^{o}C/m

Thus, we can conclude that the value of K_{b} for chloroform is 3.62^{o}C/m when 0.793 moles of solute in 0.758 kg changes the boiling point by 3.80 °C.

7 0
3 years ago
You used a calorimeter in the heat transfer lab. Explain how the calorimeter works, and how to calculate the heat given off or a
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A calorimeter contains reactants and a substance to absorb the heat absorbed. The initial temperature (before the reaction) of the heat absorbent is measured and then the final temperature (after the reaction) is also measured. The absorbent's specific heat capacity and mass are also known. Given all of this data, the equation:
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Its A. because it measures the rate of the decay of the isotope
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What could J.J. Thomson conclude from his experiments?
KonstantinChe [14]

Answer:C, atoms must balance positive and negative particles.

Explanation: Got it correct on edgenuity.

6 0
2 years ago
Which statement correctly describes compounds?
vampirchik [111]

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A compound is a pure substance because its molecule cannot be broken down into simpler particles by physical means. A compound is not a pure substance because it is not an element, and only elements are pure substances.

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2 years ago
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