Mario wants to split a beam of white light into different colors. Which tool will work best?

How many grams of sodium chloride are required to make a 1.0 L solution with a concentration of 3.5 M? 205 grams 0.205 grams 3.5

Firlakuza [10]

<span>A 1 molar solution is the molecular weight in grams in 1 litre of water, so a 3.5 molar solution would be 58.44g multiplied by 3.5, which is 204.54g in 1L.</span>

3 0

3 years ago

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Which unit conversion allows you to convert 21.0 gallons into milliliters?

Romashka-Z-Leto [24]

79470.2mL

Explanation:

Given:

Volume = 21gallons

problem, convert to milliliters;

gallons to milliliters

1 liter = 1.057 quarts

1 gallon = 4 quarts

we can simply solve this by establishing and using a conversion factor of 1 ;

1 gallon = 4 quarts

1.057 quarts = 1 liter

0.001L = 1mL

21gallons x $\frac{4qt}{1gal} x \frac{1 liter}{1.057qt} x \frac{1mL }{0.001L}$ = 79470.2mL

we say;

From; $\frac{4qt}{1gal} x \frac{1 liter}{1.057qt} x \frac{1mL }{0.001L}$

1gallon = 3784.2mL

learn more:

conversion brainly.com/question/1548911

#learnwithBrainly

8 0

3 years ago

Does the following compound contain a polyatomic ion? Na2SO4<br> Yes<br> No

seropon [69]

The answer is yes I believe so.

8 0

3 years ago

Which has a higher concentration of water molecules— 200 molecules of water, or a mixture of 300 molecules of water and 100 mole

Dovator [93]

<h3>Answer:</h3>

200 molecules of water has the highest concentration.

<h3>Explanation:</h3>

In chemistry, Concentration is defined as the amount of substance divided by the total volume of the constituents making the mixture.

<u>Case 1:</u> 200 Molecules of Water:

In this case we are having system which is made up of 200 purely water molecules and there is no other substance present in the system. Hence, for ease we can write it as,

Concentration = Molecules of Water ÷ Total Molecules of Mixture

Concentration = 200 ÷ 200

Concentration = 1

<u>Case 2:</u> 300 Molecules of Water and 100 Molecules of Food Coloring:

In this case we are having a mixture which is made up of 300 water molecules and 200 food coloring molecules. Hence, we can write it as,

Concentration = Molecules of Water ÷ Total Molecules of Mixture

Concentration = 300 ÷ (300 + 200)

Concentration = 300 ÷ 500

Concentration = 0.6

Therefore, it is proved that the concentration of pure 200 molecules of water is greater.

7 0

4 years ago

Which of these is the best definition of a fuel cell?

oksian1 [2.3K]

Answer:

A voltaic cell that uses the oxidation of a fuel to produce electricity

Explanation:

A fuel cell is a voltaic cell that converts the chemical energy of a fuel and an oxidizing agent into electricity.

A. is wrong. This definition is so broad that it could include a candle in a cup.

C is wrong. The batteries in flashlights and cell phones are not fuel cells.

3 0

3 years ago