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olga_2 [115]
2 years ago
6

Joyce has a mixture of oil and powdered sugar. The tiny pieces of sugar do not mix evenly with the oil and they do not settle to

the bottom. They stay in the oil making it look cloudy. Joyce adds water to the container, closes the lid, and shakes it. After she lets it settle, the sugar is no longer in the oil. The oil forms a layer that floats on top of the water and looks clear. How did she separate the powdered sugar from the oil?
Chemistry
2 answers:
Inessa [10]2 years ago
7 0
<span>Sugar is not soluble in Oil so it coagulated when Joyce added sugar to oil. But sugar is soluble in water so when Joyce added water in the mixture of OIl and Sugar and then shaked it the sugar dissolved in the water.Leaving no traces behind.As Oil is hydrophobic it doesn't mix with water instead it floats on top.So by using the solubility of sugar in water Joyce separated sugar from oil</span>
Law Incorporation [45]2 years ago
7 0

Answer:

The Sugar Dissolved In the Water.

Explanation:

ITS ON STUDY ISLAND!

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A 23.0g sample of a compound contains 12.0g of C, 3.0g of H, and 8.0g of O.What the empirical formula of the compound
Kryger [21]

Answer:

The empirical formula of compound is C₂H₆O.

Explanation:

Given data:

Mass of carbon = 12 g

Mass of hydrogen = 3 g

Mass of oxygen = 8 g

Empirical formula of compound = ?

Solution:

First of all we will calculate the gram atom of each elements.

no of gram atom of carbon = 12 g / 12 g/mol = 1 g atoms

no of gram atom of hydrogen = 3 g / 1 g/mol = 3 g atoms

no of gram atom of oxygen = 8 g / 16 g/mol = 0.5 g atoms

Now we will calculate the atomic ratio by dividing the gram atoms with the 0.5 because it is the smallest number among these three.

          C:H:O  =     1/0.5  :   3/0.5  :   0.5/0.5

          C:H:O  =     2      :     6      :     1

The empirical formula of compound will be C₂H₆O

5 0
2 years ago
A 3.50 g sample of rice is burned in a bomb calorimeter containing 1680 g of water. The temperature of the water increases from
alex41 [277]

Answer:

3.58 x 10^4 J

Explanation:

5 0
2 years ago
El cuerpo humano tiene unos 6 billones de células (6,0x1012) y la población de la Tierra es de unos 8 000 millones de personas.
zloy xaker [14]

Answer:

En toda la población del mundo hay <u>0.0797 moles de células</u>

Explanation:

1.0 mol of cells = 6.022 * 10∧23 cells

X mol of cells  = 6.0 * 10∧12 cells

- X is cleared to find out how many moles of cells are in a human body:

  • X = 6.0 * 10∧12 cells / 6.022 * 10∧23 cells
  • X = 9,963 * 10∧-12 moles of cells per person

In the world there are 8 * 10∧9 people, how many moles in total will there be?

8 * 10∧9 people * 9,963 * 10∧-12 moles of cells per person  =

<u>0.0797 moles of molecules in the entire population of the earth.</u>

4 0
2 years ago
If a concentration of 10 fluorescent molecules per μm2of cell membrane is needed to visualize a cell under the microscope, how m
lara [203]

Answer : Total molecules that will be needed to visualize a single egg will be 78500 molecules of dye.

Explanation : As a single egg cell has an approximately diameter of 100 μm.

We can use this formula to calculate area of the cell membrane;

A = π (100)^{2} / 4;  

We can take π as 3.14 and we get;

A = 3.14 X (100)^{2} / 4  

Soving we get;

A =  7850 μm^{2}  

Here we have to calculate the amount of dye molecules which will be needed for 10 fluorescent molecules / μm^{2}  but;

here 1 μm^{2} = 7850 μm^{2} dye molecules.

Therefore, 10 fluorescent molecules will need;  

7850 X 10 = 78500 molecules of dye.

Therefore, the answer is 78500 molecules of dye.

6 0
2 years ago
Which one is balanced or unbalanced force 1. Change object motion 2. Push or pull 3. Have direction 4. Do not change objects mot
Margaret [11]

Answer:

Explanation:

1. Change object motion - unbalanced force

2. Push or pull - Balanced forces do not cause a change in motion. When balanced forces act on an object at rest, the object will not move. If you push against a wall, the wall pushes back with an equal but opposite force. Neither you nor the wall will move. Forces that cause a change in the motion of an object are unbalanced forces. So if object move it is unbalanced.

3. Have direction - unbalanced force

4. Do not change objects motion - balanced force

5. Net force does not =0 - unbalanced force

6.net force =0 - balanced force

3 0
2 years ago
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