Science, please help and thank you!!

Science, Please Help And Thank You!!

Answers

Answer 1
Swings hope this helps

Related Questions

Different substances have....
A.the same properties
B. different properties
C.similar properties
D.all properties​

Answers

Answer:

Different properties

Explanation:

They are different.

The double bonds in an aromatic ring are not fixed in position as in an alkene. The electrons are considered to be ____ and are delocalized around the ring.

Answers

Answer: The double bonds in an aromatic ring are not fixed in position as in an alkene. The electrons are considered to be in conjugation and are delocalized around the ring.

Explanation:

Chemical compounds that have conjugated planar ring systems where there are delocalized pi-electron clouds are present in place of individual alternate and single bonds.

This means that electrons present in a double bond of alkene are in conjugation.

Therefore, we can conclude that the double bonds in an aromatic ring are not fixed in position as in an alkene. The electrons are considered to be in conjugation and are delocalized around the ring.

Answer:

In resonance

Explanation:

Got it right on Acellus.

Which ion concentration does the pH scale measure? How long is the scale?

Answers

7 which is neutral ranges from 0-14

Which of the following is a nonrenewable energy source that comes from the remains of dead
organisms?
a. Gasoline
b. Solar power
c. Geothermal heat
d. Hydroelectricity

Answers

Answer:

Gasoline

Explanation:

Coal, oil, and gas are all fossil fuels made from the remaisn of dead organisms.

please ive been stuck on this one forever​

Answers

Answer:

Melting-Solid-Liquid-Added

Freezing-Liquid-Solid-Removed

Vapourization-Liquid-Gas-Added

Condensation-Gas-Liquid-Removed

Sublimation-Solid-Gas-Added

Deposition-Gas-Solid-Removed

Explanation:

Write a balanced equation for the complete combustion of propane gas, C3H8, with
oxygen, O2, to form carbon dioxide, CO2, and water, H2O?

Answers

Answer:  

Explanation:

Balancing Carbon atoms on the right side,

Balancing Hydrogen atoms on the right side,

Balancing Oxygen atoms on the left side,

The reactants are on the left side of the reaction:

Propane and oxygen are the reactants.

The products are on the right side of the reaction:

Carbon dioxide and water are the products.

forgive me if im incorrect or leaving things out

Colin decided to investigate soil erosion by water. He measured rates of erosion on
model hills made of soil, rock, and sand. Which of the following was the test
(independent) variable?

Answers

Answer:

i just had a test on this with 2 attempts and got it wrong on both but i do know that the answer is not...

the steepness of the models hillside

or

the rate of erosion on the hills

so the answer is either...

the amount of water sprayed on the hills

or

the type of material used to construct the model hills

but i think its the amount of water sprayed on the hills...i hope i helped a lil ;)

Explanation:

Ammonia (NH3) dissolved in water is heated in a beaker. If initially there had been 60 grams dissolved in 100 grams of water, what would happen if the temperature reached 90℃ and why? A. The solution would become supersaturated and the ammonia would all remain dissolved . B. The solution would become saturated but the amount of ammonia dissolved would remain the same . C. about 50 more grams of ammonia would be able to dissolve as the solution has become unsaturated . D. about 50 grams of ammonia would come out of solution as the temperature caused the solubility to decrease .

Answers

Answer:

C. About 50 more grams ammonia would be able to dissolve as the solution has become unsaturated

Explanation:

From the question, we have;

The mass of ammonia dissolved in water = 60 grams

The mass of the water solvent which dissolves the ammonia = 100 g

The temperature to which the ammonia water solution is raised = 90°C

Therefore, given that the solubility of a solute in a solvent increases with temperature, when the temperature is raised, we have, that the solution will more unsaturated and will be able to dissolve more ammonia, therefore, option 'C' is the most correct option that corresponds with the relationship of temperature and solubility

ASAP!!!
As current flows through a system, what happens to the voltage available at each load?

Answers

Answer:

The relationship between Voltage, Current and Resistance forms the basis of Ohm's law. In a linear circuit of fixed resistance, if we increase the voltage, the current goes up, and similarly, if we decrease the voltage, the current goes down.

If 95 grams of Iron are needed to react with sulfur, how many grams of sulfur are involved in this reaction?
2 Fe + 3 S=Fe2S3

Answers

Answer:

82 g S

Explanation:

Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 81.6 grams of sulfur are involved in this reaction.

What is mole?

The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.

2 Fe + 3 S[tex]\rightarrow[/tex]Fe[tex]_2[/tex]S[tex]_3[/tex]

mass of iron = 95 grams

Molar mass of iron=55.8450 g/mol

number of moles of iron =Given mass÷ Molar mass of iron

number of moles of iron=95÷ 55.8

number of moles of iron=1.70 moles

The mole ratio between iron and sulfur is 2:3

moles of sulfur = (3/2) moles of iron

moles of sulfur = (3/2)×1.70

moles of sulfur=2.55 moles

Mass of sulfur= number of moles of sulfur× Molar mass of sulfur

                       =2.55× 32

                       =81.6g

Therefore, 81.6 grams of sulfur are involved in this reaction.

To know more about mole, here:

https://brainly.com/question/15209553

#SPJ2

A rigid container of oxygen has a pressure of 3.5 atm and a temp of 713K, what is the pressure at 273K?

Answers

Answer:

Explanation:

This is most easily solved using Gay-Lussac's Law, which relates temperature and pressure as follows:

[tex]P_{1} T_{1} =P_{2} T_{2}[/tex]

According to Gay-Lussac's law, the pressure of oxygen gas at 273 K is 1.34 atmospheres.

Gay- Lussac's law is defined as a gas law which states that the pressure which is exerted by the gas directly varies with its temperature and at a constant volume.The law was proposed by Joseph Gay-Lussac in the year 1808.

The pressure of the gas at constant volume reduces constantly as it is cooled till it undergoes condensation .Given by P₁/T₁=P₂/T₂ which on substitution gives P₂=3.5×273/713=1.34 atm.

Thus, the pressure of oxygen gas at 273 K is 1.34 atmospheres.

Learn more about Gay-Lussac's law,here:

https://brainly.com/question/2683502

#SPJ2


Calculate the number of moles in 85.0 g of carbon tetrafluoride (CFA).

Show Your Work

Answers

what element is A??????

When we look at a plant we notice that the leaves are green this is due to the

Answers

Actually If you look very close to a plant you see this:

And to answer your question leaves are green due to sun nutrients water and im not sure  what else

Will award brainliest! Between which two ionization energies would you expect to see the biggest jump for calcium? A. 11-12
B. 12-13
C. 13-14
D. 14-15

Answers

answer:lettter B that is answer


Location closer to the
equator receives less energy
from the sun.

True or false

Answers

Answer: true

Explanation:

Hope this helps

A student makes observations about a piece of copper. Which
observation describes a chemical property of the copper? (*hint: anything
relating to "measurements" of something is a physical property) *
A. it has a mass of 63.546 grams
B. corrosion occurs when it is exposed to air
C. it has a density of 8.96 g/cm^3

Answers

Answer: b

Explanation:

given the equation, N2H4 + N2O4 -> N2 + H2O, how many moles of N2)=O4 are needed to react with 3.5 moles of N2H4

Answers

Answer:

Explanation:

I think you mean

2N2H4 + N2O4 ==> 3 N2 + 4H2O

The equation says that for Every mol of N2O4, you need 2 moles of N2H4.

1/2 = x/3,5       Multiply both sides by 3.5

3.5*1 / 2 = x

1.75 = x

Therefore you need 1.75 moles N2O4 are needed for 3.5 moles of N2H4

What happends when you put m&ms in warm water for 2-3 minutes ​

Answers

Answer:

The m & m logo floats off of it. Its a fun experiment. I did it before

Explanation:

Hope that helped

I have to re ask this but pls help me I don't have a lot of time

Answers

Answer:a

Explanation:

Answer:

Hello there!

If i'm doing this correctly it is A (125 g).

Hope that helped, if I wasn't correct feel free to tell me.

Have a great day!

What is the relationship between atmospheric
pressure and vapor pressure at the boiling point of
a liquid?

a. The atmospheric pressure is equal to the
vapor pressure at the boiling point.

b. The atmospheric pressure is less than the
vapor pressure at the boiling point.

C. The atmospheric pressure is greater than
the vapor pressure at the boiling point.

d. Both Band C are correct.

Answers

correct me if I’m wrong but I believe that the answer A

C + O2 CO2
1. When solid carbon reacts with 64.0 g of oxygen gas to form carbon dioxide, no carbon or oxygen is left over. How much carbon is reacted if 88.0 grams of carbon dioxide is produced? A 24.0 g B 64.0 g C 88.0 g D 112.0 g

Answers

no. of mole = 88 ÷ ( 12 + 2(16) )

= 2 mol

mass of C = 2 × 12

= 24g ( A )

how many years can carbon dioxide stay in the atmosphere formed

Answers

Once it's added to the atmosphere, it hangs around, for a long time: between 300 to 1,000 years. Thus, as humans change the atmosphere by emitting carbon dioxide, those changes will endure on the timescale of many human lives.

Please help with q2

Answers

A. It is counterproductive
B. Vinegar
C. Ammonia

Please give me Brainliest

A) Vinegar is an Acid solution while, Ammonia is a basic solution, so when they react they form a neutral solution,

Therefore this is a neutralization reaction

B) The lower the pH value of a solution, the more acidic it is, and vise versa for basic,

In the table Vinegar has the lowest pH value, of 3. Therefore Vinegar is the most acidic in the table

C) The higher the pH value of a solution, the more basic it is

In the table Ammonia has the highest pH value of 12. Therefore Ammonia is the most basic in the table

Happy to help :)

If you need any more help, you can ask me

Which type of a reaction is best represented by the equation - AB + CD → AD + BC?

Answers

Answer:

AB + CD → AD + BC

Explanation:

This is a double displacement reaction. It is also known as precipitation reaction.

Which statement is true about this fuel cell?
It is self contained like a battery.
It continually needs to be charged.
It has an electrolyte that acts as a salt bridge.
It does not require the input of fuels from an outside source.

Answers

The statement which is true about the fuel cell is that It has an electrolyte that acts as a salt bridge.

What is Fuel cell ?

A fuel cell is an electrochemical cell that converts the chemical energy of a fuel (often hydrogen) and an oxidizing agent (often oxygen) into electricity.

The fuel cell has an electrolyte that acts as a salt bridge.

As electrolytes are nothing but the salts which are present at the inner side of the U-Tube considered as Salt bridge present in fuel cell.

In this way, Fuel cell has electrolyte that acts as a salt bridge.

learn more about salt bridge here ;

https://brainly.com/question/14969258

#SPJ1

What type of substance do these statements describe?

- It is a long chain.
- It contains carbon, hydrogen, and oxygen atoms.
- It has double bonds.
- It is insoluble in water.
- It is used for energy storage in living things.

carbohydrate
lipid
monosaccharide
protein

Answers

Answer:

lipid

Explanation:

I just know the answer i don't really have a explanation sorry

Answer:

lipid

Explanation:

edge 2021

What controls the movement of material between the inside of the cell and the outside world?

Group of answer choices

Nucleus

Cell membrane

Cytoplasm

Vacouoles

Answers

The answer is Cell membrane

Answer:

Cell membrane

Explanation:

Calculate the number of grams of nitrogen dioxide that are produced from 4 moles of nitric oxide

Answers

Answer:

hope this help by the way found off of yahoo

Explanation:

Calculate the number of grams of nitrogen dioxide that are produced from

4 moles of nitric oxide.

2NO(g) + O2(g) -->2NO2(g)

I really need help with this... I need to know how to work it too... I can balance it out but not sure about grams...  This is it balanced out with 4 moles of nitric oxide

4NO(g) + 2O2(g) ->4NO2(g) please help and explain i want to learn this

If 2 moles of salt is dissolved to form 1 liter of solution, what is the molarity of the solution?

Answers

Answer:

2M

Explanation:

Molarity refers to the molar concentration of a solution. It can be calculated by using the formula as follows:

Molarity (M) = number of moles (n) ÷ volume (V)

Based on the information provided in this question, 2 moles of salt is dissolved to form 1 liter of solution. This means that n = 2mol, V = 1L

Molarity = n/V

Molarity = 2/1

Molarity = 2M

Through photosynthesis, plants use the energy in sunlight to convert water and
carbon dioxide into sugar and oxygen. Has a chemical or physical change occurred?
Explain your answer.

Answers

Answer:

chemical change occured

Other Questions
Monty loaned his friend Ned $24,000 three years ago. Ned signed a note and made payments on the loan. Last year, when the remaining balance was $18,000, Ned filed for bankruptcy and notified Monty that he would be unable to pay the balance on the loan. Monty treated the $18,000 as a nonbusiness bad debt. Last year, before considering the tax implications of the nonbusiness bad debt, Monty had capital gains of $7,200 and taxable income of $42,000. During the current year, Ned paid Monty $16,200 in satisfaction of the debt.Determine Monty's tax treatment for the $16,200 received in the current year.The nonbusiness bad debt of $18,000 would have been reported as a ________ , and $________ would be included in Monty's gross income. The Story of an Hour relates Mrs. Mallards response to her husbands death, and reveals how she felt about their relationship. Pretend that you are writing from the perspective of Mr. Mallard following Mrs. Mallards death. What does he wish he could have told her? How does he view their marriage? Write a 300-word narrative from Mr. Mallards perspective in which his thoughts and opinions are revealed. Use descriptive details from the text in your narrative. will also cashapp when i have the money. Plz help I am bad at this plz no spamOne rectangular solid with a square base has twice the height of another rectangular solid with a square base with the same side length. Which statements about the two rectangular solids are true? Check all that apply.The bases are congruent.The solids are similar.The ratio of the volumes of the first solid to the second solid is 8:1.The volume of the first solid is twice as much as the volume of the second solid.If the dimensions of the second solid are x by x by h, the first solid has 4xh more surface area than the second solid. 1. What is the gradual change in populations over time?2. What is the idea that species originate in small gradual steps over time? HELPEOEODODOEKEKEL PLEASE son diferentes; no son las mismas. Which is the equation of the line that passes through the points (4, 3) and (6, 2)? Its urgent please? help!!!!!! What are the parts of an ecosystem? Read the excerpt from "The Arming of Patroclus."So the warriors went to battle in close array, helmet to helmet and shield to shield, close as the stones with which a builder makes a wall. What is the meaning of the figurative phrase "close as the stones with which a builder makes a wall" as it is used in the text?The warriors' armor is incapable of being pierced.The warriors march very closely to one another.The warriors get very close to their enemy.The warriors' armor resembles stones. Javina is at the store buying cheese. The cost of the cheeseis $0.44 per ounce. She buys 10 ounces of the cheese.How much money does Javina spend on the cheese?$9.00B$4.50C $4.40$8.80 Which diagram represents matter with a definite volume but nodefinite shape? Find the value of x. Round to the nearest tenth of a unit. 203 m 22 O A. 82.0 m O B. 218.9 m O C. 502.4 m O D. 541.9 m Is (3,6) a solution of the system of linear equations below? Justify your response. Use of the graph is optional.-6x + y= -12X + y= -3 In GHI, h = 990 inches, g = 910 inches and G=53. Find all possible values of H, to the nearest degree.= 60 and 120 2.3Write the ratio in its simplest form:Convert2 m : 8cm: 40mm What is the area of this composite figure?? A sentence for dower? Which of the following is an igneous rock?slatelimestonecalcite