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4 years ago

Which of the following descriptions properly describes the electrons?

Chemistry

2 answers:

gladu [14]4 years ago

5 0

Answer:

Which following? If you could please be more specific I would gladely love to answer your question. (:

vivado [14]4 years ago

5 0

Answer:

J J. Thomson discovered electron by performing his cathode ray tube experiment also called as discharge tube experiment.

Properties :

1. Electrons are negatively charged particles.

2. The mass of an electron is = $9.109\times10^{-31} Kg$

3. The particles travel in a straight line.

4. They are attracted to the magnet.

5. Electrons exhibit dual nature that is it has both particle and wave nature.

6. The antiparticle of an electron is called as a Positron which has a positive charge.

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Calculate the molar mass of K3PO4

julia-pushkina [17]

Answer:

Molar mass of K₃PO₄ = 212.27 g/m

Explanation:

K₃PO₄ (Potassium phosphate)

This is a ionic salt compounded of phosphate and potassium

Mass of potassium = 39.10 g/m

Mass of phosphorus = 30.97 g/m

Mass of oxygen = 16 g/m

Molar mass of K₃PO₄ = 39.10 x3 + 30.97 + 16 x4 = 212.27 g/m

3 0

4 years ago

PLEASE HELP ASAP!!

dusya [7]

Aluminum

Hope this helps

6 0

4 years ago

Read 2 more answers

Why are fixed resistors’ values indicated by color bands rather than printing the numeric value on their exterior?

gladu [14]

Because there are so many different values of numbers, it would be impractical to use 1Ω, 2Ω, 3Ω... etc... Using colored bands helps make reading it a little easier to the trained eye. There are hundreds of thousands, if not tens of millions of different resistors would need to exist to cover every value. So you just use something called "preferred values" with their resistance values posted on them instead.

6 0

3 years ago

Find the density of a substance that has a mass of 75 g and a volume of 35 mL. Don't forget your units!

Andrew [12]

Answer:

The density of a substance that has a mass of 75 g and a volume of 35 mL is 2.14 $\frac{g}{mL}$

Explanation:

Density is a characteristic property of a substance that relates to the amount of mass it has per unit volume. In other words, density is the property that matter, whether solid, liquid or gas, has to compress into a given space (it measures the amount of mass in a given volume of a substance). It is calculated as the quotient between the mass of a body and the volume it occupies:

$density=\frac{mass}{volume}$

In this case, you know:

mass= 75 g
volume= 35 mL

Replacing:

$density=\frac{75 g}{35 mL}$

Solving:

$density=2.14\frac{g}{mL}$

The density of a substance that has a mass of 75 g and a volume of 35 mL is 2.14 $\frac{g}{mL}$

5 0

3 years ago

I will reward Brainly please help

laila [671]

By crushing a solid into a powder you increase the reaction rate (the chemical reaction rate). By crushing into a powder, you are increasing the surface area, increasing the exposure to the chemical reaction. The smaller the particles, the faster the chemical reaction that will take place. Think about an ice cube put in a pot of boiling water. The whole ice cube will take longer to melt than if you first crushed that ice cube into small pieces. Small pieces of ice put into boiling water would melt very quickly.

Hope this helps!! :)

7 0

3 years ago