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dimaraw [331]
3 years ago
12

Hi I’m kurama have some of my points!

Chemistry
2 answers:
stellarik [79]3 years ago
8 0

Answer:

tysm kurama!! <3

Explanation:

Burka [1]3 years ago
6 0
✨Tysm for the points kurama :)✨
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How many milliliters are in one milligram?
mariarad [96]
1 milliliters in one milligram.
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3 years ago
Why are lonic Compounds brittle?​
Kruka [31]
Ionic crystals are hard because of tight packing lattices, say, the positive and negative ions are strongly attached among themselves.
3 0
3 years ago
A solution is made by adding 20 g table salt to 100 mL water. The solubility of salt is 36 g/100 mL water. Which term best descr
marysya [2.9K]

Answer:

We say that the solution is unsaturated.

Explanation:

If the salt solubility is 36 g in 0.1 L of water then we can dissolve 360 g of salt in 1 L of water.

Because the solution contains 200 g of salt in 1 L of water, the solution is unsaturated because more salt can be added until we reach the saturation point.

We call the solution dilute when we compare the concentration of a solution with the concentration of another solution, but here we do not compare different solutions.

3 0
2 years ago
Read 2 more answers
A chemist dissolves 716.mg of pure potassium hydroxide in enough water to make up 130.mL of solution. Calculate the pH of the so
Natasha_Volkova [10]

<u>Answer:</u> The pH of the solution is 13.0

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}

Given mass of KOH = 716. mg = 0.716 g    (Conversion factor:  1 g = 1000 mg)

Molar mass of KOH = 56 g/mol

Volume of solution = 130 mL

Putting values in above equation, we get:

\text{Molarity of solution}=\frac{0.716\times 1000}{56g/mol\times 130}\\\\\text{Molarity of solution}=0.098M

1 mole of KOH produces 1 mole of hydroxide ions and 1 mole of potassium ions

  • To calculate hydroxide ion concentration of the solution, we use the equation:

pOH=-\log[OH^-]

We are given:

[tex[[OH^-]=0.098M[/tex]

Putting values in above equation, we get:

pOH=-\log(0.098)\\\\pOH=1.00

To calculate the pH of the solution, we use the equation:

pOH + pH = 14

So,  pH = 14 - 1.00 = 13.0

Hence, the pH of the solution is 13.0

4 0
3 years ago
Heliocentric and Geocentric
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Explanation:

heliocentric means having the sun in the middle/center in the solar system

geocentric means having the earth in the middle/center in the solar system

therefore your answers are:

the planets orbit the sun.

in 1543, Nicolaus Copernicus proposed the theory.

the evidence that led people to believe this was when Galileo observed that four moons orbited around Jupiter. in other words, heliocentric.

most of the stars are located in the milky way galaxy.

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