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3 years ago

Help!!! i need asapp

Chemistry

1 answer:

Debora [2.8K]3 years ago

3 0

Answer: option A

The electrons are attracted to the protons

Explanation:

Electrostatics is a force that pull or push objects without the objects actually touching them.

Electrons have a negative charge and protons have a positive charge. Positive and negative attract each other so therefore the electrons are attracted to the protons.

It’s not B because the electrons aren’t 100% pushing away from the nucleus.

It’s not C because the electrons are not attracted to the neutrons. Neutrons don’t have a charge; they have a net zero charge.

It’s not D because the electrons can’t attract each other. Electrons have a negative charge and negative charges don’t attract each other; they push away from each other instead.

Hope that helps.

If you need a better explanation just let me know

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d1i1m1o1n [39]

Conduction is your first answer. More examples are; touching a hot light bulb and walking on concrete in summer.

Your second answer is C. Radiation. More examples are; a sauna and a hot car motor.

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3 years ago

Read 2 more answers

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3 years ago

How many molecules are in 25g of Na2SO4? POINTS!! Please help! Im so frustrated.

erik [133]

Hey there!

Molar mass Na2SO4 = 142.04 g/mol

Number of moles:

n = m / mm

n = 25 / 142.04

n = 0.176 moles of Na2SO4

Therefore, use the Avogadro constant

1 mole Na2SO4 ------------------- 6.02x10²³ molecules
0.176 moles Na2SO4 ------------ molecules ??

0.176 x ( 6.02x10²³ ) / 1

=> 1.059x10²³ molecules of Na2SO4

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4 years ago

Calculate the mass (in grams) of methylene bluecrystals that you must weigh in order to make 100.0mL of 1.25 × 10-5mol/L methyle

mario62 [17]

Answer: The mass of methylene blue that must be weighed is $3.99\times 10^{-4}g$

Explanation:

To calculate the mass of solute, we use the equation used to calculate the molarity of solution:

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

We are given:

Molarity of solution = $1.25\times 10^{-5}M$

Molar mass of methylene blue = 319.85 g/mol

Volume of solution = 100.0 mL

Putting values in above equation, we get:

$1.25\times 10^{-5}M=\frac{\text{Mass of methylene blue}\times 1000}{319.85\times 100.0}\\\\\text{Mass of methylene blue}=\frac{1.25\times 10^{-5}\times 319.85\times 100.0}{1000}=3.99\times 10^{-4}g$

Hence, the mass of methylene blue that must be weighed is $3.99\times 10^{-4}g$

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3 years ago

#1: Which scientist is credited with developing the orbital model of the atom?

CaHeK987 [17]

Niels Henrik David Bohr is the scientist credited with developing the orbital model of the atom. He was Danish physicist who made foundational contributions to understanding atomic structure and quantum theory. He received the Nobel Prize in Physics in 1922

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4 years ago