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ehidna [41]
3 years ago
11

Hi ! Could someone help me out with this last part to my chemistry practice ? Thank you !

Chemistry
1 answer:
skelet666 [1.2K]3 years ago
7 0

After 100years, sample is 250g

After 200 years, sample is 125g

After 300years, sample is 62.5 g

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Solar, wind, and water power are renewable resources and can replace our dependence on fossil fuels. They each have their own dr
Vesna [10]
Solar- the sun is not always shining, for example at night you can't get any energy from the sun
Wind-it's not always windy
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Really the main issue of all three of these is that they are not always available
8 0
3 years ago
Calculate the molarity of a solution with 233.772g sodium chloride dissolved in 2,000mL of water
LekaFEV [45]

Answer:

The molarity is 2M

Explanation:

First , we calculate the weight of 1 mol of NaCl:

Weight 1mol NaCl= Weight Na + Weight Cl= 23 g+ 35, 5 g= 58, 5 g/mol

58,5 g---1 mol NaCl

233,772 g--------x= (233,772 g x1 mol NaCl)/58,5 g= 4 mol NaCl

<em>A solution molar--> moles of solute in 1 L of solution:</em>

2 L-----4 mol NaCl

1L----x0( 1L x4mol NaCl)/4L =2moles NaCl---> 2 M

3 0
3 years ago
What is the complete set of quantum numbers for the fifth electron added to a hydrogen ion?
N76 [4]
1s2 2s2 2p1

fifth electron is in 2p orbital 

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*1/2 and -1/2 are spins, so they are interchangeable when writing the first electron in the ml
8 0
3 years ago
Wich statement best describes the difference between strong nuclear forces and weak nuclear forces
Vika [28.1K]

Answer: option D is right.

Explanation: There are four types of fundamental forces in nature.These are named as gravitational force,electromagnetic force,strong nuclear force and weak nuclear force.

As per the question we have to understand the role of strong nuclear force and weak nuclear force.

An atom consists of a nucleus surrounded by extra nuclear part consisting of electrons in various orbits.The nucleus contains two basic particles called protons and neutrons .Protons are positively charged while neutrons are neutral.Protons being positively charged will impart repulsive force on each other and may come out of the nucleus.But the nucleus is stable.That is due to the strong nuclear force.

Strong nuclear force is a spin dependent and charge independent force which comes into existence due to the mutual interaction of gluons which binds the protons and neutrons .Hence it is attractive in nature.It's 100 times more stronger than electromagnetic force also.

Weak nuclear force comes into existence during radio -active decay .This force is due to the exchange of ' w' and 'z' bosons[the particles like protons and neutrons having integral or zero spin] which are heavier in nature.The role of it is to change protons into neutrons and vice versa.Its a short range force.

Hence the option D is right.

4 0
3 years ago
Write a hypothesis about what causes aliens to change their <br> shape
Leviafan [203]
The difference in elements??
7 0
3 years ago
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