Answers
Related Questions
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:
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
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.
Different substances have....
A.the same properties
B. different properties
C.similar properties
D.all properties
Answers
Answer:
Different properties
Explanation:
They are different.
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.
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.
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
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.
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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
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
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:
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
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.
Calculate the number of moles in 85.0 g of carbon tetrafluoride (CFA).
Show Your Work
Answers
what element is A??????
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
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.
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
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
Which ion concentration does the pH scale measure? How long is the scale?
Answers
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:
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.
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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
Answer:
Cell membrane
Explanation:
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 )
Location closer to the
equator receives less energy
from the sun.
True or false
Answers
Answer: true
Explanation:
Hope this helps
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.
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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
Please help with q2
Answers
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