All categories

3 years ago

What happened to a balloon when it is put in freezer

1 answer:

5 0

The frozen balloon shrank because the average kinetic energy of the gas molecules in a balloon decreases when the temperature decreases. This makes the molecules move more slowly and have less frequent and weaker collisions with the inside wall of the balloon, which causes the balloon to shrink a little.

You might be interested in

Why the stability of No+ is greater than No?

lyudmila [28]

Because of the protons connected to the Nitrogen oxide group giving it its positive charge.

7 0

3 years ago

Who is the editor in chief of The Washington Post?.

Stels [109]

Steven Ginsberg named managing editor of The Washington Post, rounding out senior management team

6 0

2 years ago

How many moles are equal to 1.20 x 1024 atoms of sulfur?

kakasveta [241]

1.20x1,024=1228.8 this is your answer.
hope that this helps.

8 0

3 years ago

Read 2 more answers

Round the following numbers to the number of significant figures indicated:

Kruka [31]

3.5
9
24.7
8.01
0.006
13(1.25×1012=12.65)

Explanation:

Above we have simply looked the condition that where we put decimal point that gives your needed answer after round off.

For example:

we have to make 2 s.f from 345 so we kept decimal after 3 and we rounded off to make 3.5 from 3.45

Hope you got it

7 0

3 years ago

How many moles of potassium nitrate are required to make 550 mL of a 2.1M solution?

stira [4]

Answer:

1.155 moles of potassium nitrate are required to make 550 mL of a 2.1M solution.

Explanation:

In a mixture, the chemical present in the greatest amount is called a solvent, while the other components are called solutes.

Molarity is a unit of concentration of a solution and indicates the amount of moles of solute that appear dissolved in each liter of the mixture. In other words, the Molarity (M) or Molar Concentration is the number of moles of solute that are dissolved in a given volume.

The Molarity of a solution is determined by the following expression:

$Molatity( M)=\frac{number of moles of solute}{Volume}$

Molarity is expressed in units ( $\frac{moles}{liter}$ ).

In this case:

Molarity= 2.1 M
number of moles of solute= ?
Volume= 550 mL= 0.550 L (being 1L=1000 mL)

Replacing:

$2.1 M= 2.1 \frac{moles}{liter} =\frac{number of moles of solute}{0.550 liters}$

Solving:

number of moles of solute= 2.1 M* 0.550 L

number of moles of solute= 1.155 moles

1.155 moles of potassium nitrate are required to make 550 mL of a 2.1M solution.

4 0

3 years ago