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Olegator [25]
3 years ago
12

In a laboratory experiment,john uses a mesh to separate soil particles from water.what technique of separation is he using?

Chemistry
1 answer:
loris [4]3 years ago
6 0
John is using Filtration
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What is the symbol, atomic number, atomic mass, # of protons, # of neutrons, # of electrons, ion charge for the beryllium ion?
jolli1 [7]

Answer:

Symbol Be

atomic number 4

protons 4

neutrons 5

electrons 4

ion charge +2

Explanation:

Look at the periodic table and all the answers can be found there. If you would like to learn how to find them please message me below.

8 0
3 years ago
Which type of molecule is shown below?
worty [1.4K]
We will need to see what the picture looks like post the picture of the molecule
8 0
3 years ago
I need to know the answer ASAP PLEASE
ki77a [65]

Answer:

E....H+

Explanation:

coz when hydrogen ions are formed they automatically join to form hydrogen

6 0
3 years ago
at atmoshperic pressure, a balloon contains 2.00L of nitrogen of gas. How would the volume change if the Kelvin temperature were
Nataly [62]

<u>Answer:</u> The percent change in volume will be 25 %

<u>Explanation:</u>

To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

\frac{V_1}{T_1}=\frac{V_2}{T_2}

where,

V_1\text{ and }T_1 are the initial volume and temperature of the gas.

V_2\text{ and }T_2 are the final volume and temperature of the gas.

We are given:

V_1=2L\\T_1=T_1\\V_2=?\\T_2=75\% \text{ of }T_1=0.75\times T_1

Putting values in above equation, we get:

\frac{2L}{T_1}=\frac{V_2}{0.75\times T_1}\\\\V_2=\frac{2\times 0.75\times T_1}{T_1}=1.5L

Percent change of volume = \frac{\text{Change in volume}}{\text{Initial volume}}\times 100

Percent change of volume = \frac{(2-1.5)}{2}\times 100=25\%

Hence, the percent change in volume will be 25 %

5 0
3 years ago
Atoms of which element have the greatest tendency to gain electrons?
Anastasy [175]
Fluorine. 

Because:- Atoms want to become stable, for an atom to become stable, they need 8 valence electrons. Since Fluorine has 7 valence electrons, it only needs one more electron to become stable and have an octet. An octet is when an atom/element has 8 valence electrons. Since Fluorine will need to gain an electron, it will have a negative charge, and become an anion. 
8 0
3 years ago
Read 2 more answers
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