CHEMISTRY HIGH SCHOOL

HELP WILL REWARD BRAINLIESTMark each Saturated or Unsaturated
2.00 g of PbCl2 at 80°C

100.2 g of NaNO3 at 60°C

128 g of KI at 0°C

75.5 g of LiCl at 20°C

8.22 g of Ba(OH)2 at 40°C

Answers

Answer 1
Answer:

Answer:

1) unsaturated

2) unsaturated

3) saturated

4) unsaturated

5) saturated

Explanation:

A solution with solute that dissolves until it is unable to dissolve anymore, leaving the undissolved substances at the bottom., is called saturated. Each solution has a certain amount of mass that can dissolve at certain temperature.

A solution with less solute than the saturated solution, that completely dissolves, leaving no remaining substances., is called unsaturated.

A solution ,with more solute than the saturated solution, that contains more undissolved solute than the saturated solution, is called oversaturated.

A) 2.00 g of PbCl2 at 80°C

⇒ At 80 °C this solution is saturated when there is 2.54 grams of PbCl2 in solution

2.00 < 2.54   This solution is unsaturated

B) 100.2 g of NaNO3 at 60°C

⇒ At 60 °C this solution is saturated when there is 122 grams of NaNO3 in solution

100.2 < 122

This solution is unsaturated

C) 128 g of KI at 0°C

⇒ At 0 °C this solution is saturated when there is 128 grams of KI in solution

This solution is saturated

D) 75.5 g of LiCl at 20°C

⇒ At 20 °C this solution is saturated when there is 83.5 grams of LiCl3 in solution

75.5 < 83.5

This solution is unsaturated

E) 8.22 g of Ba(OH)2 at 40°C

⇒ At 40 °C this solution is saturated when there is 8.22 grams of Ba(OH)2 in solution

This solution is saturated

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What is the mass of 4.23×10^23 atoms of iron

Answers

First divide atoms by Avogadro's number:
(4.32x10^23)/(6.02x10^23) = .703mol Fe

Then multiply moles by its molar mass:
(0.703mol Fe)(55.85g/mol Fe) = 39.24g Fe

26 PONITS FOR BEST ANSWER28

Which of the following is not related to the First Law of Motion?

An object in motion stays in motion unless acted on by an outside force.
An object at rest will stay at rest.
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Which of the following is not an example of friction?

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Why do phytoplanktons have projections and form long chains?

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If an object's acceleration is zero, which of these could be true?

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Answers

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trust me plz i am good at chemistry

According to the electron-cloud model of the atom, an orbital is a(1) circular path traveled by an electron around the nucleus
(2) spiral path traveled by an electron toward the nucleus
(3) region of the most probable proton location
(4) region of the most probable electron location

Answers

Answer : Option 4) Region of the most probable electron location.


Explanation : As per the electron cloud model of the atom, an orbital is a region where the probability of finding an electron is highest. According to this model which was used to identify the probable location of the electrons when they go around the nucleus of an atom.


This electron cloud model was different from the older Bohr atomic model by Niels Bohr.
According to the electron-cloud model of the atom, an orbital is a "region of the most probable electron location" In this mode, an electron can actually be in two places at once. 

Determine the mass of 5.20 moles of C6H12 (gram-formula mass = 84.2 grams/mole).

Answers

Hello!

Determine the mass of 5.20 moles of C6H12 (gram-formula mass = 84.2 grams/mole).

We have the following data:

m (mass) = ? 

n (number of moles) = 5.20 moles

MM (Molar mass of C6H12) ≈ 84.2 g/mol

Now, let's find the mass, knowing that:

n = (m)/(MM)

5.20\:\:\diagup\!\!\!\!\!\!\!mol = (m)/(84.2\:g/\diagup\!\!\!\!\!\!\!mol)

m = 5.20*84.2

\boxed{\boxed{m = 437.84\:g}}\end{array}}\qquad\checkmark

_______________________

I Hope this helps, greetings ... Dexteright02! =)
Molar mass C₆H₁₂ = 84.2 g/mol

1 mole ---------- 84.2 g
5.20 moles ---- ?

Mass C₆H₁₂ = 5.20 * 84.2 / 1

Mass = 437.84 /1

= 437.84 g

hope this helps!

At constant temperature and pressure, 2.05 g of oxygen gas O2 is added to a 1.0 L balloon containing 1.00 g of O2. What is the new volume of the balloon?

Answers

Answer:

1.50 L.

Explanation:

  • From the general gas law:

PV = nRT,

Where, P is the pressure if the gas,

V is the volume if the gas container,

n is the no. of gas moles,

R is the general gas constant,

T is the temperature of the gas.

  • At constant P and T:

n₁V₂ = n₂V₁.

V₁ = 1.0 L, V₂ = ??? L.

n₁ = mass/molar mass = (2.05 g)/(32.0 g/mol) = 0.064 mol.

  • n₂ is the no. of moles of the total gas (2.05 g + 1.0 g).

n₂ = n₁ + (1.00 g)/(32.0 g/mol) = 0.0953 mol.

∴ V₂ = n₂V₁/n₁ = (0.0953 mol)(1.0 L)/(0.064 mol) = 1.489 L ≅ 1.50 L.

The isotope 65Cu2+ has how many electrons and how many protons?

Answers

The isotope ^(65)_(29)Cu^(2+) has 27  electrons and 29 protons.

Given:

The isotope of copper with +2 charge and mass number of 65.

To find:

The number of electrons and protons in the given isotope.

Solution

The atomic number of copper = 29

Atomic number = Number of protons

Number of protons in copper atom = 29

Number of electrons in copper atom = 29

The isotope of copper=  ^(65)_(29)Cu^(2+)

(A neutral atom has equal number of protons and electrons)

The number of protons in isotope and in parent atom remains same.

Number of proton in  ^(65)_(29)Cu^(2+)= 29

Charge on the given copper's isotope ( ^(65)_(29)Cu^(2+)) = +2

Number of electrons  ^(65)_(29)Cu^(2+) :

= 29 - 2 = 27

(+2 charge indicates lessor two electrons out of total electrons)

The isotope ^(65)_(29)Cu^(2+) has 27  electrons and 29 protons.

Learn more about isotopes and atom here:

brainly.com/question/11623261

brainly.com/question/13214440?referrer=searchResults

29p,36n,27e

i think is the answer
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