Answer:
The hot water was better for removing the oil.
Explanation:
You can see that because the mass went down more with the hot water. So, that means that more oil was taken out of the feather with hot water.
Answer:
The mass changed from 1.1grams to 4.5 grams. The appearance is another thing that changed when it got dipped in oil. The feather look like it lost some feathers or the feathers became transparent. The feather just looks soggy and heavier overall. I believe that if Natalia dips the feather covered in oil in cold water, the feather will remain the same. If she were to dip it in hot water, the feather will get rid of the oil mostly. Think about it, in the ocean the water is cold right? So when oil spills in the ocean it will stay there. Hot water is the best to remove the oil from the feather.
Explanation:
Hopefully this will help.
Calculate the molar solubility of aluminum hydroxide (AlOH)3) in a 0.027M solution of aluminum nitrate (Al(NO3)3). The Ksp of AlOH)3 is 2.0x10-32.
Answer:
s = 5.22x10⁻⁹ M
Explanation:
Let's write the equilibrium reaction for this compound:
Al(OH)₃ <-------> Al³⁺ + 3OH⁻ Ksp = 2x10⁻³²
To get the solubility, we need to write the equilibrium expression:
Ksp = [Al³⁺] [OH⁻]³
Al(OH)₃ does not contribute to the equilibrium expression, because is a solid compound. Now, according to this, we have the following:
Al(OH)₃ <-------> Al³⁺ + 3OH⁻
I. 0 0
E. s 3s
Replacing into the Ksp expression:
2x10⁻³² = (s) (3s)³
2x10⁻³² = s * 27s³
2x10⁻³² = 27s⁴
s = ⁴√2x10⁻³² / 27
s = 5.22x10⁻⁹ MThis would be the solubility of the compound.
Hope this helps
Which of the following statements is FALSE? *
a.Smog is a phenomenon brought about by natural events.
b.Forest fires may be caused by human activities or by natural events.
c.Volcanic eruptions may contribute large amounts of pollutants to the atmosphere.
d.Under normal condition, the greenhouse effect maintains a temperature that support life on Earth.
Answer:
A:smog is a phenomenon brought about by natural events
Explanation:
false because of how phenomenon it is smog did not bought phenomenon and natural events!!
DOES THIS HELPFUL?
Scientists, emergency personnel, and the weather service keep a close eye on this potential natural disaster that impacts Florida several times each year. What is this disaster being tracked here?
Answer:
hurricane
Explanation:
What is the percent by mass of carbon in carbon dioxide (CO2)?
A. 27%
B. 33%
C. 43%
D. 73%
A leaking underground storage tank or wastewater pouring into a river from a pipe would be examples of
Answer:
Water pollution.
Explanation:
This is because water pollution refers to the release or disposal of harmful substances called contaminants which contaminate water bodies which include rivers, oceans, lakes e.t.c.. These harmful substances affect aquatic organisms and make water unfit for good use. This can lead to the death if aquatic lives in the water bodies, release of bad smells and make the water bad . A leaking underground storage tank or wastewater pouring into a river from a pipe can be a source of water pollution.
why do different people have differently shaped proteins?
The sequence of amino acids in the chain determines how the chain will fold up to make the protein, so different proteins have different three-dimensional shapes. ... This is because proteins form attachments and interact with many other molecules and structures inside organisms.
1) Escribe oraciones coherentes que incluyan los siguientes términos con los conceptos correspondientes:
CARBÓN-PETRÓLEO-GAS NATURAL-RECURSO NO RENOVABLE-
COMBUSTIBLES FÓSILES-HIDROCARBUROS-RESERVAS-CONTAMINACIÓN-
MAREAS NEGRAS
La respuesta correcta para esta pregunta abierta es la siguiente.
Estas son las oraciones apropiadas.
El carbón, el petróleo, y el gas natural son recursos naturales no renovables.
Estos generadores naturales de energía son considerados combustibles fósiles que produce la mayor parte de hidrocarburos que se usan en el mundo. Sin embargo, estas reservas energéticas se están agotando porque son recursos naturales no renovables. Además, estos combustibles son altos generadores de contaminación como es el caso de las mareas negras.
Independientemente de estas ideas, es apropiado decir que los combustibles fósiles han sido fuertemente cuestionados por los ambientalistas y los científicos porque son causantes del llamado calentamiento global y del cambio climático.
Por esa razón, la sociedad y los expertos ambientalistas están pidiendo que los gobiernos comiencen a utilizar más energías alternativas y renovables como la energía solar y las turbinas de viento o energía eólica.
Is this correct??Pls help!!!
Answer:
C
Explanation:
Answer:
Yes, your answer is correct. B is correct :3
Marie Curie's work with radioactive materials eventually lead to her death. At the age of 66, what
disease did Madame Curie die from?
Answer:
Radiation-induced Luekimia
Explanation:
They worked with many radioactive elements, so it caused Leukemia which is
a disease in which the bone marrow and other blood-forming organs produce increased numbers of immature or abnormal leukocytes.
Hoped this helped
What do plants do with sugar? *
Release it through their stoma
Eat it for energy
Convert it into oxigen
Convert it into water
Answer:
its B .Eat it for energy.
If an atom has 8 electrons and 8 protons and 9 neutrons then what is it's net charge?"
choices:
0
1+
1-
2-
Which heat source is most directly connected to the seasons?
Answer:
the solar heat source from the sun is what gives us most of the heat
Explanation:
If a system is left to change spontaneously, in what state will it end?
A. The state with the lowest possible energy consistent with the state of maximum disorder
B. the state with lowest possible energy
C. The same state in which it began
D. The state with the maximum disorder
Answer:
The state with the lowest possible energy consistent with the state of maximum disorder
so letter A
If a system is left to change spontaneously then, the state with the lowest possible energy is consistent with the state of maximum disorder. option A is correct.
what is spontaneous change?A spontaneous change may be so fast or rapid or in a fraction of time that it is essentially instantaneous or fast or so slow that it cannot be observed over any practical time of period.
A is the spontaneous change is one in which the system happening into which the A an increase or boost in internal energy B lowering decline in entropy C lowering in energy D no energy change Medium.
The time-evolution or change of a system in which it releases free energy and it moves to a lower, or decreased more thermodynamically stable energy state, closer to attend the thermodynamic equilibrium.
Therefore, the system is left to change spontaneously then, and the state with the lowest possible energy is consistent with the state of maximum disorder. option A is correct.
Learn more about spontaneous change, here :
https://brainly.com/question/14437673
#SPJ2
How many days does it take the moon to orbit the Earth once.
Answer:
27.3 days
Explanation:
I really have no explanation lol.
Answer:
Hope thia helps
Explanation:
it takes 27.3 days!!!
. Which of these types of electromagnetic radiation has the lowest energy?
a. Radio waves
b. Visible light
c. Gamma rays
an organism that gains energy by feeding on other organism is a
A. consumer
B. predator
C. prey
D. parasite
F. host
Answer: the answer is A
Explanation:
Answer:
The answer to your question is, A. consumer.
Explanation:
Any organism that 'consumes' other organisms is a consumer
100 POINTS!!! AND BRAINLIEST!!!
This tree species was preserved as a fossil in the Arizona desert. The species is now extinct. Describe what the environment was like when the tree lived and how it is different now. Then, infer why this type of tree and other living things that lived with it are extinct.
if (H+] = 10^-2 M
what will be pH = ?
if 26.8g of copper (ll) chloride are dissolved in sufficient water to make 4.00 L of solution, what is the molarity of the solution? & what is the solvent?
Answer: Molarity of the solution is [tex]4.97 \times 10^{-2} M[/tex] and water is the solvent.
Explanation:
Given: Mass of solute = 26.8 g
Volume = 4.00 L
Now, moles of copper (II) chloride (molar mass = 134.45 g/mol) are calculated as follows.
[tex]No. of moles = \frac{mass}{molar mass}\\= \frac{26.8 g}{134.45 g/mol}\\= 0.199 mol[/tex]
Molarity is the number of moles of a substance divided by volume of solution in liter.
Therefore, molarity of given solution is calculated as follows.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.199 mol}{4.00 L}\\= 0.04975 M\\= 4.97 \times 10^{-2} M[/tex]
Solvent is defined as a component which is present in higher amount in a solution. Generally, a solvent is present in liquid state but it can also be a solid or gas.
In the given solution, copper (II) chloride is dissolved in water so copper (II) chloride is the solute and water is the solvent.
Thus, we can conclude that molarity of the solution is [tex]4.97 \times 10^{-2} M[/tex] and water is the solvent.
What is the acceleration of a 7 kg
mass being pulled by a 56 N force?
Answer:
8 meters per second per second
Explanation:
Newton's second law: [tex]f=ma[/tex], force = mass multiplied by acceleration.
Therefore 56 / 7 = acceleration = 8
Help i’m taking a test!!
What new element is formed from the equation below? (Answer form is
MN:, AN: , S)
Answer:
Element Z
Explanation:
I hope this is correct and helps you!
How many moles are there in 100g of helium
Explanation:
so for this one u need to remember this equation and use it to find out moles= mass /mr . Mr of helium is 4
so moles= mass /mr
=100/4
=25 moles
hope this make sense:)
How much energy is required to raise the temperature of a 300.0
gram block of lead from 22.3°C to 59.9°C? The specific heat of lead is
0.129 J/gºC.
Answer:
Q = 1455.12 Joules.
Explanation:
Given the following data;
Mass = 300 grams
Initial temperature = 22.3
Final temperature = 59.9°C
Specific heat capacity = 0.129 J/gºC.
To find the quantity of energy;
[tex] Q = mcdt[/tex]
Where,
Q represents the heat capacity.
m represents the mass of an object.
c represents the specific heat capacity of water.
dt represents the change in temperature.
dt represents the change in temperature.
dt = T2 - T1
dt = 59.9 - 22.3
dt = 37.6°C
Substituting the values into the equation, we have;
[tex] Q = 300*0.129*37.6 [/tex]
Q = 1455.12 Joules.
Which of the following processes is not an example of physical weathering?
A. acidification
B. abrasion
C. frost action
D. exfoliation
Answer:
acidification
Answer:
I think its A
Explanation:
Hope this helps: )
explain what conservation of mass is and how to calculate it
a chemist determined by measurements that 0.015 moles of tungsten participated in a chemical reaction. Calculate the mass of tungsten that participated in the chemical reaction.
Answer: 0.84g
Explanation:
2.3g of lithium chloride in 500cm3 of solution
Answer:
0.109M
Explanation:
Find molarity of the solution:
Molarity is defined as the ratio between the moles of the solute (Lithium Chloride in this case) per liter of solution. To solve this question we have to find the moles of LiCl and its volume as follows:
Moles LiCl -Molar mass: 42.394g/mol-
2.3g * (1mol / 42.394g) = 0.0543 moles
Volume in liters:
500cm³ * (1L / 1000cm³) = 0.500L
Molarity:
0.0543 moles / 0.500L =
0.109M
Write out a “for every” statement that relates the amount of methane to the amount of oxygen gas (CH4 + 2O2 = CO2 + 2H2O)
Answer:
For every one molecule of methane, one molecule of oxygen is required to release one molecule of CO2 and 2 molecule of H2O
Explanation:
As we can in the balanced equation below -
CH4 + 2O2 = CO2 + 2H2O
One molecule of CH4 reacts with two molecule of oxygen to release one molecule of CO2 and 2 molecule of H2O.
Hence, it can be said
For every one molecule of methane, one molecule of oxygen is required to release one molecule of CO2 and 2 molecule of H2O
12. A. 2 g of ferrous sulphate crystals 5 points
are heated in a dry boiling tube. a)
Name and define the type of reaction
that has taken place. b) Write
balanced chemical equation for the
above reaction. c) List two main
observations of this reaction. B. A
shining metal 'M'on burning gives a
dazzling white flame and changes to
a white powder ‘N’. a) Identify ‘M'and
'N'. b) Name the type of reaction
taking place and write the balanced
chemical equation.
Answer:
A) Decomposition reaction.
Decomposition reaction is defined as a chemical reaction whereby a compound is broken down into 2 or more simpler substances.
B) 2FeSO4 + Heat > Fe2O3 + SO2 + SO3
C) - Gas evolution because a gas is part of the product
- Upon heating its colour gradually changes from pale green to reddish brown which implies a change in state
Explanation:
A) Name of the reaction is; Decomposition reaction.
Decomposition reaction is defined as a chemical reaction whereby a compound is broken down into 2 or more simpler substances.
B) The balanced chemical equation is;
2FeSO4 + Heat > Fe2O3 + SO2 + SO3
C) From experience, the 2 main observations of this reaction are;
- Gas evolution because a gas is part of the product
- Upon heating its colour gradually changes from pale green to reddish brown which implies a change in state.
Please help me I need help.