How much water has to be evacuated from 250ml of 1M Ca(OH)2 to make it 3M
Answer:
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Explanation:
Answer could not be show due to technical difficulties
The concentration terms are molality, normality and mole fraction. Molarity can be used to find out the ionic strength of any solution. The volume of 3M diluted solution of calcium hydroxide is 83.3ml.
What is molarity?Molarity can be calculated by dividing number of moles of solute by volume of solution in litre. Molarity is affected by temperature. Its unit is mole/liter. It measure the concentration of any solute in a solution.
Mathematically,
According to the neutralization law,
M₁V₁=M₂V₂
where,
M₁ = molarity of stock solution = 1 M
V₁ = volume of stock solution = 250ml
M₂ = molarity of dilute solution =3M
V₂ = volume of dilute solution = ?
substituting all the given values we get
M₁V₁=M₂V₂
1 M×250ml=3M×V₂
V₂=83.3ml
Therefore, volume of 3M diluted solution of calcium hydroxide is 83.3ml.
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formula for trichlorine tetroxide
Answer:
*Chlorine trioxide is ClO3
Explanation:
As a roller coaster goes downhill.
A. kinetic energy is converted into potential energy
B. potential energy is converted into kinetic energy
C. electrical energy is converted into potential energy
D. potential energy is converted into electrical energy
Explanation:
C electrical energy is converted into potential energy
Answer:
I can confirm it is, Potential energy is converted into kinetic energy.
Explanation:
If 5.025 grams of NaOH are dissolved in 2.4 liters of water, what is the Molarity of the solution?
Answer:
0.052 M.
Explanation:
Hello!
In this case, since the molarity is computed by dividing the moles of the solute by the volume of the solution in liters (M=n/V), we first need to compute the moles in 5.025 grams of NaOH as shown below:
[tex]n=5.025g*\frac{1mol}{40.0g}\\\\n=0.126mol[/tex]
In such a way, we compute the molarity as show below:
[tex]M=\frac{0.126mol}{2.4L}\\\\M=0.052M[/tex]
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If 0.45 liters of water is formed during the combustion of propane, how many liters of carbon dioxide are formed?
will give you brainiest
16. Copper is made by the electrolysis of copper sulfate solution
Look at the diagram of the apparatus used in this electrolysis.
6 volt DC
power supply
Copper sufate solution
Carbon (graphtel electrodes
Desenbe what you would see at each of the electrodes
Answer:
SORFRRRRRRRRRRRRY!
Explanation:
Which of the following is an example that a chemical reaction has occurred?
A. Cut piece of lumber into two pieces
B. Bubbling/fizzing
C. Phase change (ex. solid changes to liquid)
D. Iron being melted
A nickel is placed in a cup of boiling water. Predict whether a solution will form.
I really don’t know
how does a decrease in potential energy during a chemical rwaction relate to the temperature of the surroundings
Answer: If the potential energy of the reaction system decreases, then kinetic energy in the surroundings increases and the temperature of the surroundings rises
Explanation:
The decrease in the potential energy results in an increase in the temperature of the system and surroundings.
Mechanical energy has been described as the sum of the kinetic and the potential energy in the system. With the increase in the potential energy, there has been a decrease in the kinetic energy and vice versa.
The decrease in the potential energy results in an increase in the kinetic energy of the system. The kinetic energy has been termed as the energy of performing work. The rise in the kinetic energy results in an increase in the work done in the system and there has been an increase in the temperature of the system.
Thus, the decrease in the potential energy results in an increase in the temperature of the system and surroundings.
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There are six elements that are common to all
Answer:
earth air water
Explanation:
Write the formula of the conjugate base of the Brønsted-Lowry acic, HF
Answer:
Furthermore, because hydrofluoric acid, HF, loses a proton, H+1, to generate its conjugate in the reaction that is shown above, this reactant can be classified as a Brønsted-Lowry acid, and, consequently, the fluoride ion, F–1, is the conjugate base of this acid.
Explanation:
hope this helps
The formula of the conjugate base of the Bronsted-Lowry acid, HF is represented as F⁻.
What is the Bronsted-Lowry concept?The Bronsted-Lowry theory can be described as an acid-base reaction where acid and base react with each other and by an exchange of proton acid, produces its conjugate base and the base creates its conjugate acid.
The Bronsted-Lowry concept is actually an extended version of Arrhenius's theory of acid base. According to the Bronsted-Lowry concept, acid is a substance that donates a hydrogen ion or a proton and forms its conjugate base and the base is a substance that accepts proton and produces its conjugate acid.
Bronsted-Lowry acid can be represented as:
Acid ⇄ Conjugate base + H⁺
The conjugate base of Bronsted-Lowry acid HF can be represented as follows:
HF ⇄ F⁻ + H⁺
Therefore, fluoride ion F⁻ is the conjugate base of the Bronsted-Lowry acid HF.
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which is colder, -30.0 F or 225.0 K?
Answer:
-30.0 F
Explanation:
225 K is - 48.15 Celsius
-30.0 F is - 1 Celcius
What property of water is primary for living organisms? (SC.6.E.7.4) *
It is odorless.
It does not conduct electricity.
It is tasteless
It is liquid at most temperatures on Earth.
*20 points* I wil mark brainliest
Answer:
It is liquid at most temperatures on Earth.
En la ecuación: Fe2O3 + CO = Fe + CO2.
El agente reductor es:
a)oxido ferrico
b)dióxido de carbono
c)monóxido de carbono
d)hierro
Answer:
English please
Explanation:
Whose atomic theory explains how atoms emit (release) and absorb light?
O Bohr's
O Dalton's
O Rutherford's
O Thomson's
Answer:
Bohr's model of hydrogen atom
I hope this answer is correct
Answer:
Bohr's
Explanation:
Can any wan help pls pls
Answer:
1) food molecules enter receptors .....
2) The sensory receptors sends the message....
3) The message reaches the brain
4) the brain procces the information it recieved...
5) The brain stores the info ...
6) The brain retrieves the info . ....
(I hope its clear ! I hope its right too ;) )
NEED HELP ASPA WILL MAKE THE BRAINIEST ANSWER
A student captures 0.50
moles of hydrogen (H2), oxygen (O2), chlorine (Cl2), carbon dioscide (CO2), and carbon monoxide (CO) gas in separate, evacuated flasks.
Arrange the flasks of gases in order of increasing grams of gas.
.H
H
H2
H2
Answer: [tex]H_2[/tex] < [tex]CO[/tex] < [tex]O_2[/tex] < [tex]CO_2[/tex] < [tex]CL_2[/tex]
Explanation:
According to avogadro's law, 1 mole of every substanceweighs equal to its molecular mass and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]
1. Mass of [tex]H_2=moles\times {\text {Molar mass}}=0.50moles\times 2g/mol=1g[/tex]
2. Mass of [tex]O_2=moles\times {\text {Molar mass}}=0.50moles\times 32g/mol=16g[/tex]
3. Mass of [tex]Cl_2=moles\times {\text {Molar mass}}=0.50moles\times 71g/mol=35.5g[/tex]
4. Mass of [tex]CO_2=moles\times {\text {Molar mass}}=0.50moles\times 44g/mol=22g[/tex]
5. Mass of [tex]CO=moles\times {\text {Molar mass}}=0.50moles\times 28g/mol=14g[/tex]
Thus the flasks of gases in order of increasing grams of gas is:
[tex]H_2[/tex] < [tex]CO[/tex] < [tex]O_2[/tex] < [tex]CO_2[/tex] < [tex]CL_2[/tex]
Why do not all rock types contain fossils?
Excessive heat and pressure can destroy fossils.
Fossils can only be created in certain places around the world.
Fossils cannot be created near volcanoes.
Fossils are too large to be found in igneous and metamorphic rocks.
Answer:
Igneous rocks form from molten rock, and rarely have fossils in them. Metamorphic rocks have been put under great pressure, heated, squashed or stretched, and fossils do not usually survive these extreme conditions. Generally it is only sedimentary rocks that contain fossils.
Explanation:
Hope it helps, some how.
C5H12 + O2 = CO2 + H2O
If 84.3 grams of C5H12 react according to the above equation and the % yield is 94% find the actual yield of grams of carbon dioxide
Answer: 241.6 grams of CO2
Explanation: you take 84.3 grams C5H12 and divide it by 72.15 grams of C5H12(which is the molar mass) you take that answer and calculate the mols of CO2 by multiplying the 1.168 you got before and multiply it by 5. You take the answer you get from that and multiply it by the molar mass of CO2 and get the theoretical yield and then you just plug it in. 94= (x/257.02)x100 and solve to find x which is the actual yield.
I have to write the balanced equation
please fill this formula
The energy associated with a current is called____________
(A) mechanical energy
(B) magnetism
(C) geothermal energy
(D) electrical energy
Answer:
D. Electrical energy
Explanation:
I assume you are talking about an electrical current.
(These are by what I know and are simplified, not an exact definition)
A. Mechanical energy is energy that something has because of motion.
B. Magnetism is the attracting and repulsing forces between magnets.
C. Geothermal energy is heat inside of the Earth. Used as source of power.
D. Electrical energy is the result of an electric charge.
Naming lonic Compounds
Name the following lonic Compounds using the lonic naming rules. Remember, place the metal's name
first, followed by the non-metal element, replacing the ending with ide"
1.SrBr,
2.NaCl
3. Mgs
4. LIP
5. Ko
6. Ca N,
7. Balz
Answer:
1.storantium bromide
2.sodium chloride
3.magnesium sulphide
4.lithium polymer
5.potassium hydroxide
6.calcium nitride
7.it decomposition of tetrafluroborates and hexaflurophosphates
Question 3 (0.05 points)
Fixed metals are metals in representative elements, plus three metals in transition
elements: Zn, Ag, Cd. Variable metals are metals in transition elements, except Zn,
Ag, and Cd. What is the different between the names of ionic compounds containing
fixed metal and those containing variable metals?
A) Ionic compounds containing variable metals should have Roman numerals
CD B) lonic compounds containing fixed metals should have prefixes
C) lonic compounds containing fixed metals should have Roman numerals
Pleaseeeeeee helppppppp
Answer:
A) Ionic compounds containing variable metals should have Roman numerals
Explanation:
The correct option is;
A) Ionic compounds containing variable metals should have Roman numerals
This is because these variable metals have variable oxidation states and charges. Hence, to be able to distinguish between compounds containing the same element but different charges, the roman numerals is used. For example;
FeCl₃ - Iron(III) Chloride
FeCl₂ - Iron(II) Chloride
A force that is opposite to motion of a falling object?
Answer:
Sliding friction: A friction force that opposes the motion of an objects as it slides over a surface.
I need help with both parts, ill give brainliest and 30 points
Part A: What changes does sugar undergo when heated in a spoon over the flame?
Select one:
A. A physical change, then a chemical change
B. Two physical changes
C. Two chemical changes
D. A chemical change, then a physical change
Part B: What evidence from the experiment and data table best supports your answer to Part A? Use information from the stimulus material and your knowledge of science to support your answer. In your answer, be sure to:
Desribe the evidence that supports your answer to Part A.
Provide your reasoning why that evidence supports your answer to Part A.
Answer:
part a=A. A physical change, then a chemical change
part b:evidence
without physical change any sorts of chemical change do not take place.
for example: when sugar is heated on spoon the physical change takes place in sugar .sugar starts to form liquid from solid.
Answer:
Part A. C would be your answer I think
Sugar is made of carbon, hydrogen and oxygen atoms. When heated over a candle, these elements react with the fire to turn into a liquid. The heat causes the sugar's atoms to combine with the oxygen in the air, forming new groups of atoms. Energy is released in this chemical reaction in the form of smoke and black soot.
Part B. I don't know I just think of the answer... Meaning I'm good and science, Chemistry and all that good stuff ;-;
Explanation:
What is a membrane?
A: Another term for a cells nucleus
B: a sort of “skin that encloses something
C: A type of genetic material
D: A single-called organism
newtons 1st law is also called what?
Answer: Newton's first law is often called the law of inertia
Explanation:
Me without you is like a nerd without braces, A shoe without laces, aSentenceWithoutSpaces.
Answer:
LOL
Explanation:
are people partially responsible for acid rain? why or why not
Answer: Because They fall back to earth in the form of rain, sleet, hail, snow and dust. Most acid rain is caused by humans in the form of burning of fossil fuels. A very small percentage of acid rain is caused by natural causes such as volcanoes or wildfires.Human activities are the main cause of acid rain. Over the past few decades, humans have released so many different chemicals into the air that they have changed the mix of gases in the atmosphere. ... In addition, the exhaust from cars, trucks, and buses releases nitrogen oxides and sulfur dioxide into the air.
Explanation: