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3 years ago

What is the mass in grams of one mole of any substance know as

Chemistry

1 answer:

likoan [24]3 years ago

3 0

Q. What is the mass in grams of one mole of any substance know as

A. Molar Mass

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1.What does the Law of Conservation of Energy tells us?

lorasvet [3.4K]

1. Energy can neither be created or destroyed.
2. Conduction. Putting a pot of water on a hot burner. Convection. Putting your wet shoes over an air vent to dry them quicker. Radiation. Sitting in front of the fire to warm your hands up.
3. renewable sources can be used again and again, but non renewable sources cannot.
4. I would recommend solar energy. I think solar energy should be considered because solar energy can be reused, and also because they can use it to power their houses and they wouldn't need fossil fuels to do so.
5. Turn off the lights and open the windows during the day and if something is left plugged into the wall and it is not being used, unplug it.

hope I could help!

4 0

3 years ago

Which of the following gives the molarity of a 17.0% by mass solution of sodium acetate, CH 3COONa (molar mass = 82.0 g/mol) in

weeeeeb [17]

Answer:

The molarity of this solution is 2.26 M (option D)

Explanation:

Step 1: Data given

Mass % = 17%

Molar mass of CH3COONa = 82.0 g/mol

Density of the solution = 1.09 g/mL

Step 2:

Assume the mass of the solution is 1.00 gram

⇒ 17.0 % CH3COONa = 0.17 grams

⇒ 83.0 % H2O = 0.83 grams

Step 3:

Density = 1.09 g/mL

Volume of the solution = total mass / density of solution

Volume of solution : 1.00 grams / 1.09 g/mL

Volume of the solution = 0.917 mL = 0.000917 L

Step 4: Calculate number of moles of CH3COONa

Number of moles = Mass / molar mass

Number of moles CH3COONa = 0.170 grams / 82.0 g/mol

Number of moles = CH3COONa = 0.00207 moles

Step 5: Calculate molarity

Molarity = moles / volume

Molarity solution = 0.00207 / 0.000917 L

Molarity solution = 2.26 mol/L = 2.26 M

The molarity of this solution is 2.26 M (option D)

6 0

3 years ago

A technical machinist is asked to build a cubical steel tank that will hold 195 L of water. Calculate in meters the smallest pos

Aleks04 [339]

Answer:

The smallest possible inside length of the tank is $0.579$ m.

Explanation:

As we know that

$1 m^3 = 1000 L$

Thus, volume of $195$ liter tank is also equal to $0.195$ cubic meter

The volume of a cube is equal to $x^3$ , where, x is the length of the side of the cube

With the give condition,

$x^ 3 = 0.195$

Solving the above equation, we get -

$x = (0.195)^{\frac{1}{3})}\\x = 0.579$

The smallest possible inside length of the tank is $0.579$ m.

4 0

3 years ago

What is the outcome of all chemical changes when two substances are combined?

hodyreva [135]

Answer:

Producing a new substance

Explanation:

A change in matter that produces a new substance.

6 0

3 years ago

At STP, when 3.75 liters of oxygen reacts with excess glucose, what volume of carbon dioxide does it produce?

yKpoI14uk [10]

Well, STP means standard temperature and pressure

In this condition, it is safe to assume that the moles of specie given will be equal to the moles of specie sought

I think the volume of the Carbon dioxide that it produced will also be 3.75 liters

Hope this helps

6 0

3 years ago

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