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3 years ago

Ecology is the study of what

Chemistry

1 answer:

Setler79 [48]3 years ago

3 0

Answer:

Relative organisms

Explanation:

Ecology is a branch of biology that deals with the relations of organisms to one another and to their physical surroundings and conditions.

hope this helps:)

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Determine the percent composition of sodium in sodium carbonate

crimeas [40]

11×2=22
(11×2)+(6)+(8×3)=52
22/52=0.4230
0.4230×100=42.3%

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3 years ago

How many grams of NaOH are produced from 20 grams of Na2Co3

Mariulka [41]

Answer:

1400

Explanation:

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2 years ago

0.71 g Cu equals how many moles

Norma-Jean [14]

The correct answer is 0.011330374846536 Hope this helps ;D

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2 years ago

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Which of the following is an example of a pure substance? *

Natali [406]

Answer:

Iron shavings

Explanation:

A substance that has a fixed chemical composition throughout and a mixture is when two or more substances are combined, but they are not combined chemically.

3 0

2 years ago

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

2 years ago

Ecology is the study of what​

Ecology is the study of what