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11Alexandr11 [23.1K]
3 years ago
5

Not needed anymore! Sorry for the inconvenience.

Chemistry
1 answer:
notka56 [123]3 years ago
6 0

Answer:

Explanation:

What?

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How is calculating a weighted average
kirza4 [7]

Answer:

The Key difference between average vs weighted average is that simple average is nothing but simply adding up all the observation values and dividing the same by the total number of observations to calculate the average whereas weighted average is an average where each observation value will have a frequency assigned.

Explanation:

8 0
3 years ago
Entropy can be thought of as the degree of disorganization of a system.<br> TRUE<br> FALSE
Mice21 [21]

Answer:

True

Explanation:

The entropy of a system denoted by S is a thermodynamic function that increases in value when there are more ways to arrange the particles in the system. Some spontaneous chemical processes are entropy driven. An increase in entropy is said to drive the dissolution of ionic salts along with the evaporation of water are related to the spreading out of energy.

The entropy of a system can be taken as a measure of disorder of a system. In a spontaneous chemical process, the entropy of the universe is said to increase. ΔSunivu>0. Making the answer true.

7 0
2 years ago
Vodka is composed of 40% ethanol and 60% water. Water is the _____. while ethanol is the __, and vodka is a _____?
Mars2501 [29]

Answer:

The answer is A. solvent, solute, solution.

Explanation:

3 0
3 years ago
What is the volume of an object with a density of 24.5 g/cm³ and a mass of 8.2 g?
vitfil [10]

<u>Answer:</u> The correct answer is option A.

<u>Explanation:</u>

To calculate the volume of an object, we use the formula:

Density=\frac{\text{Mass of an object}}{\text{Volume of an object}}

We are given:

Density of an object = 24.5g/cm^3

Mass of an object = 8.2 grams

Volume of an object = ?

Putting values in above equation, we get:

24.5g/cm^3=\frac{8.2g}{Volume}

Volume=0.33cm^3

Hence, the correct answer is Option A.

6 0
3 years ago
How many grams of nano3 are needed to prepare 100 grams of a 15.0 % by mass nano3 solution? will give brainliest
Greeley [361]

Answer:

Calculate the mass percent of a potassium nitrate solution when 15.0 g KNO3 is dissolved in 250 g

of water.

2. Calculate the mass percent of a sodium nitrate solution when 150.0 g NaNO3 is dissolved in 500 mL

of water. Hint: 1 mL water = 1 g water

3. Calculate the weight of table salt needed to make 670 grams of a 4.00% solution.

4. How many grams of solute are in 2,200 grams of a 7.00% solution?

5. How many grams of sodium chloride are needed to prepare 6,000 grams of a 20% solution?

Mass Percent = Grams of Solute

Grams of Solution X 100%

100%

Grams of Solute = Grams of Solution X Mass Percent

= 26.8 grams NaCl

= 670 grams X 4.00%

100%

100%

Grams of Solute = Grams of Solution X Mass Percent

= 154 grams solute

= 2,200 grams X 7.00%

100%

100%

Grams of Solute = Grams of Solution X Mass Percent

= 1,200 grams NaCl

= 6,000 grams X 20.0%

100%

Explanation:

5 0
3 years ago
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