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qaws [65]
2 years ago
15

A group of electrons is treated as a point charge of -1.12 x 10-18 C. How many electrons make up this point charge? Remember tha

t each electron has a charge of -1.602 x 10-19 C. o 2 o 4 4 07​
Chemistry
1 answer:
Pepsi [2]2 years ago
4 0

Answer:

7

Explanation:

Given that the total charge is given by;

C =nq

Where;

n = number of charges

q = quantity of charge

Where the total amount of charge is  -1.12 x 10-18 C and the magnitude of each charge is  -1.602 x 10-19 C

Then the number of electrons is obtained from;

n =  -1.12 x 10-18 C/ -1.602 x 10-19 C

n = 7

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A liquid solvent is added to a flask containing an insoluble solid. The total volume of the solid and liquid together is 80.0 mL
Lyrx [107]

Answer:

111.44 g

Explanation:

We'll begin by calculating the volume of the solvent. This can be obtained as follow:

Mass of solvent = 21 g

Density of solvent = 0.865 g/mL.

Volume of solvent =?

Density = mass /volume

0.865 = 21 /volume of solvent

Cross multiply

0.865 × volume of solvent = 21

Divide both side by 0.865

Volume of solvent = 21 / 0.865

Volume of solvent = 24.28 mL

Next, we shall determine the volume of the solid. This can be obtained as follow:

Volume of solvent + solid = 80.0 mL.

Volume of solvent = 24.28 mL

Volume of solid =?

Volume of solid = (Volume of solvent + solid) – (Volume of solvent)

Volume of solid = 80 – 24.28

Volume of solid = 55.72 mL

Finally, we shall determine the mass of the solid. This can be obtained as follow:

Density of solid = 2.00 g/mL.

Volume of solid = 55.72 mL

Mass of solid =.?

Density = mass / volume

2 = mass of solid / 55.72

Cross multiply

Mass of solid = 2 × 55.72

Mass of solid = 111.44 g

Therefore, the mass of the solid is 111.44 g

8 0
3 years ago
What mass of silver ag which has an atomic mass of 107.87 amu contains the same number of atoms contained in 10.0g of boron b wh
Masteriza [31]

To contain the same number of atoms also mean to contain the same number of moles. So let us say that X is the mass of Silver Ag required, so that:

X / 107.87 = 10 / 10.81

<span>X = 99.79 g</span>

6 0
3 years ago
Read 2 more answers
What is the independent variable for a dry ice experiment
mote1985 [20]
The independent variable is a variable that is being manipulated or controlled. This is to see how it affects, changes and yields the outcome of the particular stimuli. 

The dry ice experiment has an IV of temperature and a DV of melting time.
3 0
3 years ago
D
maksim [4K]

Answer:

can you provide a picture?

7 0
3 years ago
Why is the cell membrane essential for cell homeostasis?
Nadya [2.5K]
Hello,

Here is your answer:

The proper answer to this question is option C "To allow waste to exit the cell"! The cell membrane controls the matieral that goes in and out of the cell!

Your answer is C.

If you need anymore help feel free to ask me!

Hope this helps!
3 0
2 years ago
Read 2 more answers
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