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geniusboy [140]
2 years ago
8

PLEASE HELP EATHER ANSWER ONE OR ALL OR HOW MANY YOU WANT

Chemistry
2 answers:
Klio2033 [76]2 years ago
5 0

Answer:

Describe the scientific method/process and list its steps:

The scientific method consists of six steps:

1. Define purpose

2. Construct hypothesis

3. Test the hypothesis and collect data

4. Analyze data

5. Draw conclusion

6. Communicate results

But what is it?

The scientific method is a process with the help of which scientists try to investigate, verify, or construct an accurate and reliable version of any natural phenomena.

-

Define speed and velocity:

Speed is the quantitative measure of how quickly something is moving. Velocity defines the direction of the movement of the body or the object. Speed is primarily a scalar quantity. Velocity is essentially a vector quantity. It is the rate of change of distance.

List the three Laws of Isaac Newton and provide an example for each law.

1 -  An object will remain at rest or in uniform motion in a straight line unless acted upon by an external force. It may be seen as a statement about inertia, that objects will remain in their state of motion unless a force acts to change the motion.

(example: A coin put on top of a paper on the table will stay in place when the paper is pulled.)

2 - That force is equal to the change in momentum per change in time. For a constant mass, force equals mass times acceleration, i.e. F = m*a.

(example: A truck which carries less mass will have a bigger acceleration that a truck which carries more mass)

3 - States that for every action there is an equal and opposite reaction.

(example: Our hand feels pain when we hit the table because the table gives force as a reaction to our hand)

List the two types of waves.

1. Mechanical Wave -->  A mechanical wave is a wave that is an oscillation of matter and is responsible for the transfer of energy through a medium.

2. Electromagnetic Wave -->  Electromagnetic waves are created by a fusion of electric and magnetic fields. The light you see, the colours around you are visible because of electromagnetic waves.

-

What is electricity?

Electricity is the flow of electrical power or charge.

-

Discuss what is electromagnetism.

Electromagnetism is a branch of physics that is about the electromagnetic force that is between electrically charged particles. Electromagnetism is the basic reason why the electrons are bound to the nucleus and responsible for the complete structure of the nucleus!

lidiya [134]2 years ago
3 0

Explanation:

Speed is the rate of an object moving along a path, whereas velocity is the direction of motion

Electricity is the flow of electric charge

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How many carbon atoms are there in 2 molecules of CCI
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Answer:

Explanation:

No moraculos si a minha memoria não me trai acho temus 2tomos d carbono

4 0
3 years ago
Dihydrogen dioxide decomposes into water and oxygen gas. Calculate the amounts requested if 1.34 moles of dihydrogen dioxide rea
a_sh-v [17]

Answers:

<em><u>a. Moles of oxygen formed:</u></em><u> 0.670 mol</u>

<em><u>b. Moles of water formed:</u></em><u> 1.34 mol</u>

<em><u>c. Mass of water formed:</u></em><u> 24.1 g</u>

<em><u>d. Mass of oxygen formed:</u></em><u> 21.4 g</u>

<u></u>

Explanation:

Dihdyrogen dioxide is the chemical name for a compound made of two hydrogen atoms and two oxide atoms, i.e. H₂O₂, which is also known as hydrogen peroxide or oxygenated water.

The decomposition reaction of dihydrogen dioxide into water and oxygen gas is represented by the balanced chemical equation:

2H_2O_2(l)\rightarrow 2H_2O(l)+O_2(g)

The mole ratios derived from that balanced chemical equation are:

  • 2 mol H₂O₂ : 2 mol H₂O : 1 mol O₂

<em><u>a. Moles of oxygen formed</u></em>

  • Set the proportion using the theoretical mole ratio of H₂O₂ to O₂ and the amount of moles of dyhydrogen dioxide that react:

2\text{ mol }H_2O_2/1\text{ mol }O_2=1.34\text{ mol }H_2O_2/x

When you solve for x, you get:

  • x = 1.34 mol H₂O₂ × 1 mol O₂ / 2 mol H₂O₂ = 0.670 mol O₂

<u />

<em><u>b. Moles of water formed</u></em>

  • Set the proportion using the theoretical mole ratio of H₂O₂ to H₂O and the amount of moles of dyhydrogen dioxide that react:

2\text{ mol }H_2O_2/2\text{ mol }H_2O=1.34\text{ mol }H_2O_2/x

When you solve for x, you get:

  • x = 1.34 mol H₂O₂ × 2 mol H₂O / 2 mol H₂O₂ = 1.34 mol H₂O

<em><u>c. Mass of water formed</u></em>

Using the number of moles of water calculated in the part b., you calculate the mass of water formed, in grams, using the molar mass of water:

  • Molar mass of water = 18.015 g/mol

  • Number of moles = mass in grams / molar mass

       ⇒ mass in grams = number of moles × molar mass

       ⇒ mass in grams = 1.34 mol × 18.015 g/mol = 24.1 g

<em><u>d. Mass of oxygen formed</u></em>

Using the number of moles of oxygen determined in the part a., you calculate the mass in grams using the molar mass of O₂.

  • Molar mass of O₂ = 32.00 g/mol
  • mass = molar mass × number of moles
  • mass = 32.00 g/mol × 0.670 mol = 21.4 g.
5 0
3 years ago
Based on the information, what is the balanced chemical equation representing the burning of butane?
kompoz [17]

Answer:

OptionA. 2C4H10 + 13O2 —> 8CO2 + 10H20

Explanation:

Butane burns is air (O2) according to the equation:

C4H10 + O2 —> CO2 + H20

Considering the equation, it is evident that it not balanced. Now let us balance the equation as shown below;

There are a total of 4 carbon atoms on the left and 1 carbon atom on the right. It can be balanced by putting 4 in front of CO2 as shown below:

C4H10 + O2 —> 4CO2 + H20

Next, there are 10 hydrogen atoms on the left and 2 hydrogen atoms on the right. Therefore to balance it, put 5 in front of H2O as shown below:

C4H10 + O2 —> 4CO2 + 5H20

Now, there are a total of 13 oxygen atoms on the right and 2 at the left. To balance it, put 13/2 in front of O2

as shown below

C4H10 + 13/2O2 —> 4CO2 + 5H20

Now we multiply through by 2 clear off the fraction and we obtained:

2C4H10 + 13O2 —> 8CO2 + 10H20

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4 years ago
in physics class Annie is designing a small circuit that can operate a mixer identify the device she should use in the circuit a
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Which type of bond is found between atoms and solid cobalt?
zheka24 [161]
Cobalt is a metal thus the atoms are bonded together in giant atomic structures and metallic bonds. The atoms attract each other with very strong atomic forces this the resulting structure is giant atomic structures. This provides for the extra strong structure of cobalt.
3 0
3 years ago
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