Answer:
0.512 M
Explanation:
We'll begin by calculating the number of mole in 12 g of C₂H₆O₄. This can be obtained as shown below:
Mass of C₂H₆O₄ = 12 g
Molar mass of C₂H₆O₄ = (2×12) + (6×1) + (4×16)
= 24 + 6 + 64
= 94 g/mol
Mole of C₂H₆O₄ =?
Mole = mass /molar mass
Mole of C₂H₆O₄ = 12 / 94
Mole of C₂H₆O₄ = 0.128 mole
Next, we shall convert 250 mL to L. This can be obtained as follow:
1000 mL = 1 L
Therefore,
250 mL = 250 mL × 1 L / 1000 mL
250 mL = 0.25 L
Thus, 250 mL is equivalent to 0.25 L.
Finally, we shall determine the molarity of the solution. This can be obtained as follow:
Mole of C₂H₆O₄ = 0.128 mole
Volume = 0.25 L
Molarity =?
Molarity = mole /Volume
Molarity = 0.128 / 0.25
Molarity = 0.512 M
Thus, the molarity of the solution is 0.512 M
if drop a watermelon from the top of one of the tower dorms at CSU, and it takes 3.34 seconds to hit the ground, calculate how tall the building is in meters and then convert into feet.
Answer:
179.5 feet
Explanation:
54.718 m converted to 179.5 feet.
The number of Atoms present in one mole of an element is equal to Avogadro Number. Which One Of the Following contains the greatest number of Atoms? (1)4g He (2)46g Na (3)0.40g Ca (4) 12g He
Answer:
Thus, the element containing the greatest number of atoms is 12 g He. Thus, the correct option is (4) 12 g He. Note: The number of atoms of a compound is Avogadro's number for 1 mole of compound. The number 6.022×1023 is known as Avogadro's number.
Explanation:
(4)✔️ 12 g He
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iammallikaAnswer:
120gram I think so this is the answer if the answer is correct plz mark me as brainliest.
True or false: Denaturation of an enzyme increases the rate at which it may catalyze a chemical reaction.
When a gas is heated,
Answer: when gas is heated ,they gain more kinetic energy causing them to move faster.
Explanation: so as they gain kinetic energy they hit the walls of the container with more force thus causing pressure to increase
HOPE THIS HELPSS comment if u need more explanation
If the sky is actually black, and the water is actually clear, where does the blue color for the sky and water come from?
Answer:
that the water is blue because of the way water absorbs light, the way particles in the water scatter light, and also because some of the blue light from the sky is reflected
Describe what is happening within the system when it is at equilibrium in terms of concentrations, reactions that occur, and reaction rates.
Answer:
Describe what is happening within the system when it is at equilibrium in terms of concentrations, reactions that occur, and reaction rates.
Explanation:
The chemical equilibrium state is the state where the rate of forward reaction becomes equal to the rate of backward reaction.
At this stage the change in concentration of reactants becomes equal to the change in concentration of products.
The reaction will never cease.
That is the reason chemical equilibrium is called dynamic equilibrium.
So, forward and backward reactions will be taking place continuously at equal rates.
WHAT IS PHOTOSYNTHESIS??
Answer:
the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
Answer:
the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
Polywool fibre is
a.natural
b.synthetic
c.monomer
d.blended
Polywool fibre is synthetic.
⇒b. Synthetic
Hope It Helps You ✌️
Answer:
[tex]\large{\underbrace{\underline{\fcolorbox{White}{pink}{\bf{b.synthetic }}}}}
[/tex]
Help me please I really need this tomorrow
Answer:
answers:
1.b
2.d
3.b
4. c
5.c
6.d
7.c
Explanation:
I think this is the correct answer pls mark brainliest and like..
19. place moth balls in the closet and observe after several days.
20. whenever wax or a candle burns it turns from solid to liquid but again at room temperature it turns to solid
21. evaporation, condensation, precipitation
22. it produces new substances
23. vinegar Bubbles when baking soda is added.
24. steam
The formal charge and P-O bond order in PO43- respectively are 0.6, -0.75 -0.75, 1.25 1.0, -0.75 1.25, -3 98.
Answer:
-0.75 , 1.25
Explanation:
Number of electrons present in valence shell,
P-O = 5 + 8 = 13
Number of electrons involved in bond formation,
13 - 3 = 10
Number of bonds in PO3 - 4ion = 102
Average P-O bond = 1.25
Average formal charge on Oxygen atom is -0.75
Select the structure that corresponds
to the name:
decanoic acid
COOH
A.
B. CH3(CH2)7COOH
C. both
Answer:
b
Explanation:
Molecular formula of Decanoic Acid is C₁₀H₂₀O₂ therefore Option A is the right answer.
What is Decanoic Acid ?Decanoic Acid is a C10 , straight chain , saturated fatty acid . Its general formula is C₁₀H₂₀O₂ .
In the first option we can see a straight chain , saturated fatty acid and the molecular formula is also same as decanoic acid .
In second option the molecular formula is C₉H₁₈O₂ which is not same as Decanoic Acid.
Hence option A is the right answer.
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(6 mol)(-393.5 kJ/mol) + (6 mol)(-285.83 kJ/mol)) - (1 mol)(-1,273.02 kJ/mol)= ?kj
Answer:
-2,802.960 kJ
Explanation:
The dimensional equation of the given quantities is presented as follows;
(6 mol) × (-393.5 kJ/mol) + (6 mol) × (-285.83 kJ/mol) - (1 mol) × (-1,273.02 kJ/mol) = ? kJ
The equation, can be written as follows;
[tex]\left (6 \times (-393.5) \, mol \times \dfrac{kJ}{mol} \right ) + \left(6 \times (-285.83) \, mol \times \dfrac{kJ}{mol} \right) - \left (1 \times (-1,273.02) \, mol \times \dfrac{kJ}{mol} \right) = ?[/tex]We note that [tex]mol \times \dfrac{kJ}{mol} \right) = kJ[/tex], therefore, the above equation becomes;
[tex]\left (6 \times (-393.5) \ kJ\right ) + \left(6 \times (-285.83) \ kJ \right) - \left (1 \, \times (-1,273.02) \ kJ \right) = -2,802.960 kJ[/tex]
Answer:
C. ((6 mol)(-393.5 kJ/mol) + (6 mol)(-285.83 kJ/mol)) - (1 mol)(-1,273.02 kJ/mol)
Explanation:
Got it right on edge.
: the one after is -2803.
what is 10x412x3021x13123
Ecstasy is one example of which of the following?
Depressants
Narcotics
O Club drugs
Stimulants
Answer:
Narcotics
I think ans is
Explanation:
tropicaia
Ecstasy, also known as MDMA, is used recreationally, so it can be called a club drug. However, it is illegal in the US, so it would be considered a narcotic as well. The effects it has are also of the stimulant variety, so they would fall under that category as well. It is definitely not a depressant.
What phrase describes a good scientific question?
has a wide focus
addresses a gap in knowledge
does not lead to a testable hypothesis
O has a simple yes or no answer
vious Activity
a) The bubbles must be negatively charged.
b) The bubbles must be positively charged.
c) The bubbles must have the opposite charge to the charge on the student.
d) The bubbles must have the same charge as the charge on the student.
Answer:
C
Explanation:
like charges repel each others so if they have the same charge they will move away from each other
which organ is used to detect the product of neutralisation reaction
Answer:
Neutralization reactions occur when two reactants, an acid and a base, combine to form the products salt and water.
The organ that is used to detect the product of a neutralization reaction is the sense of taste.
When a neutralization reaction occurs between an acid and a base, it results in the formation of a salt and water. The salt produced in the reaction may have a distinct taste, depending on its chemical properties. For example, when hydrochloric acid reacts with sodium hydroxide, the products are sodium chloride and water. Sodium chloride, commonly known as table salt, has a characteristic salty taste.
Similarly, other salts formed from neutralization reactions may have different tastes. For instance, magnesium hydroxide reacting with acetic acid produces magnesium acetate, which has a slightly sweet taste. By using our taste buds, particularly on the tongue, we can detect and identify the taste of the salt formed during a neutralization reaction.
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Can someone please do a True or false for these PLEASE
Answer:
true
false
false
true
false
true
true
false
false
true
true
Balance the equation for
__Ca+__Pb(NO3)2—__Pb+__Ca(NO3)2
Answer:
Ca + Pb(NO3)2 → Pb + Ca(NO3)2
Explanation:
This is an oxidation-reduction (redox) reaction:
PbII + 2 e- → Pb0
(reduction)
Ca0 - 2 e- → CaII
(oxidation)
Pb(NO3)2 is an oxidizing agent, Ca is a reducing agent.
If the elements W, X, Y, and Z have electronegativity values of 1.0, 2.0, 2.5, and 3.5, respectively, which bond is the least polar
Answer:
XY bond is the least polar
Explanation:
Given
[tex]W = 1.0[/tex]
[tex]X = 2.0[/tex]
[tex]Y = 2.5[/tex]
[tex]Z = 3.5[/tex]
Required
The least polar bond
First, we calculate the difference in the electronegativities
[tex]WX = X - W[/tex]
[tex]WX = 2.0 - 1.0[/tex]
[tex]WX = 1.0[/tex]
[tex]WY = Y - W[/tex]
[tex]WY =2.5 - 1.0[/tex]
[tex]WY =1.5[/tex]
[tex]WZ =Z-W[/tex]
[tex]WZ =3.5 - 1.0[/tex]
[tex]WZ =2.5[/tex]
[tex]XY = Y -X[/tex]
[tex]XY = 2.5 -2.0[/tex]
[tex]XY = 0.5[/tex]
[tex]XZ = Z -X[/tex]
[tex]XZ = 3.5 -2.0[/tex]
[tex]XZ = 1.5[/tex]
[tex]YZ = Z - Y[/tex]
[tex]YZ = 3.5 - 2.5[/tex]
[tex]YZ = 1.0[/tex]
The least of the above calculations will be the least polar.
Hence, XY is the least polar
1) The percentage of oxygen in dry air is _______
A. 0.1
B. 1.0
C. 21
D. 79
2) The composition of the Earth’s earliest atmosphere was different to that of the present atmosphere. Which of these gases was present in large amounts in the Earth’s earliest atmosphere?
A. Oxygen
B. Carbon dioxide
C. Ammonia
D. Nitrogen
Answer:
1) The percentage of oxygen in dry air is _______
C. 21
2) The composition of the Earth’s earliest atmosphere was different to that of the present atmosphere. Which of these gases was present in large amounts in the Earth’s earliest atmosphere?
B. CARBON DIOXIDE
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have a nice day
Answer: The percentage of oxygen in dry air is . 21
Explanation: Ammonia gases was present in large amounts in the easth7s earliest atmosphere
Hope it will help you
SI units is an improved version of MKS system.
Answer:
the S.I unit
Explanation:
is the best unite
Why does it stop expanding when you stop blowing air into it
Answer:
this is because of collisions of molecules present in that particular system.
Explanation:
For instance, when air is filled in a balloon then the number of the molecules of air inside the balloon increases. As a result more collisions of molecules take place with the walls. This gives rise to high air pressure on the walls which causes the balloon to expand and get inflated.
¿Qué características distinguen a los coloides de otras mezclas?
Please a little help in this I will really appreciate it
Answer:
b is your answer...........
help me plz!!!!
a. Calculate the solution concentration for each of the HCl samples. The first one has been done for you.
b. As the concentration of the HCl solution increased, did the speed of the reaction increase or decrease?
c. Therefore, as the concentration of a reactant increases, does the rate of the reaction increase or decrease?
d. Do your predictions previous to this investigation agree with your results?
e. Make a general rule about the effects of concentration of reactants on reaction rates.
Answer:
From this solution, you can do the a number question answer.
Two magnets are stuck together. What might you have to do to get them to separate?
Explanation:
The easiest method to separating magnets is to slide them apart. When separating magnets keep in mind shear force. Magnets are measured on pull strength, so are up to five times easier to move if they are pushed apart instead of pulled apart. Small magnets slide relatively easily, even without spacers.
Firmly slide them away from each other and far enough apart so that they don't hop back together. Neodymium magnets are quite strong.
What are properties of a magnet?The properties of the magnet are:
Magnets will attract ferromagnetic.Like poles of the magnet repel each other and unlike poles bait each otherThe poles of the magnet are in the team.Thus, slide them away from each other and far enough apart so that they don't hop back together.
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How many bonds can a carbon atom form?
O A. 1
B. 2
C. 4
O D. 3
In which of the following will the density increase?
Group of answer choices
An iron bar is heated.
A lead weight is moved from sea level to the top of a high mountain.
A sample of water is frozen.
A diamond is submerged in water.
A sample of chlorine gas is compressed.
C20H16+
_Cl2 →
C+
HCl
Please help me fast
Answer:
1 C10H16 + 8 Cl2 --> 10 C + 16 HCl
