From the calculation, Suzanne is lying and she is guilty of killing her husband.
What is stoichiometry?Stoichiometry provides a means of calculating the relationship between mass and mole or mole and volume in a reaction.
Now the preparation of ethylbenzene goes according to the reaction;
C6H6 + C2H6 ---->C6H5C2H5 + H2
Number of moles of benzene = 15 g/78 g/mol = 0.192 moles
Number of moles of ethyl benzene= 25 g/106 g/mol = 0.236 moles
Since the reaction is 1:1, 0.192 moles of ethyl benzene is produced.
Mass of 0.192 moles of ethylbenzene = 0.192 moles * 106 g/mol = 20.4 g
Suzanne is lying.
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Is brass a heterogeneous or homogeneous mixture ??????
Answer me first and right and then I promise you I will mark you the brainliest.
Also 20 points
Answer:
Brass is a homogenous mixture of copper and zinc
Hope it helped u, plz put thanks
Answer:
Brass is an alloy made up of uniform composition of copper and zinc. It is a homogeneous mixture in which zinc and copper can be varied to create a range of brasses with varying properties.
Explanation:
Hope it helps jenita or jeni , ya jenny
I hope the picture is there this time, help asap
All are true about how does gravity aid erosion except?
Gravity causes rocks to fall and break apart.
Gravity causes rocks to get larger then breaks it apart.
Gravity causes other soil and sand to move down eroding rocks.
Gravity pulls rainwater down eroding rocks.
Find the molecular mass of MgSO4
Answer:
120
Explanation:
Atomic weight of :
Mg=24
S=32
O=16
Molecular mass of MgSO4=24+32+(16*4)=120
2. As the concentration of a solution increases how does the amount of light absorbed vary?.
Answer:
Absorbance increases.
Explanation:
Recall that absorbance is directly proportional to concentration as illustrated by Beer's Law:
[tex]\displaystyle A = \epsilon bC[/tex]
Where A is the absorbance and C is the concentration of the solution.
Therefore, as the concentration of a solution increases, the amount of light absorbed (absorbance) likewise increases.
each atom contains a equal number of
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.
Answer:
molecules
Explanation:
Each atom contains a equal number of molecules
Which statement about
destructive interference is true?
Which isoelectronic series is correctly arranged in order of increasing radius?.
A) K+ < Ca2+ < Ar < Cl
B) < Ar < K+ < Ca2+
C) Ca2+ < Ar < K+ < Cl
D) Ca2+ < K+ < Ar < Cl
E) Ca2+ < K+ < Cl- < Ar
Answer:D
Which of the below options is not a type of chemical bond?
magnetic attraction
ionic bond
covalent bond
polar bond
Answer:
magnetic attraction
Explanation:
Magnetic attraction is not a type of chemical bond while ionic bond, covalent bond and polar bonds are types of chemical bonds.
What is an ionic bond?Ionic bond or electrovalent bond is a type of bond which is formed between two elements when there is an exchange of electrons which takes place between the atoms resulting in the formation of ions.
When the atom looses an electron it develops a positive charge and forms an ion called the cation while the other atom gains the electron and develops a negative charge and forms an ion called the anion.
As the two atoms are oppositely charged they attract each other which results in the formation of a bond called the ionic bond.Compounds with ionic bonds are hard and have high melting points.These bonds usually exist in crystals.
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1st law, 2nd law, 3rd law?
Answer:
2nd law
Explanation:
newtons second law states that the force F acting on a body is equal to the mass m of the body multiplied by the acceleration a of its center of mass.
Solids and liquids are virtually incompressible whereas gases are compressed all the time. Describe why this is true – what special properties of a gas allow this?
Solids and liquids are virtually incompressible whereas gases are compressed all the time, This is true because of their properties of shape volume properties where, Solids have a definite shape and volume, no definite shape and volume.
What are the properties of gas and solids?Generally, Gases are widely dispersed and are not strongly held together atomically.
Therefore, the space occupied can be comprised from one area to another
While Solids are hardly compressible because
They are strongly held and will rather break on tryingBecause their atoms are tightly held there is little or no space to compress to.Read more about volume
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what liquid has the density of 900g/L
Answer:
Oil, lubricating
Explanation:
which Souce energy are commonly
used in our Bhutan?
Answer:
Wind
Explanation:
Because, The strong wind can be used to turn turbine to generate electricity to light the houses in Bhutan.
Are the following chemical equations balanced?
NH, +2, + NO + H2O
Answer:
I think it is D
Explanation:
because i did this one
3. A submarine fills a special storage area known as a ballast with water in order to
increase its density. This allows it to dive deeper in the ocean. When a submarine
needs to rise rapidly, compressed air is used to push the water out of the ballast.
What effect does replacing the water in the ballast with air have on the submarine?
A. The submarine's volume increases, lowering its density.
B. The submarine's mass decreases, lowering its density.
C. The submarine's mass increases, raising its density.
D. The submarine's volume decreases, decreasing its density.
Answer:
B; The submarine volume increases, lowering its density.
Explanation:
My teacher told me.
Which is the electron configuration for bromine?
A) 1s22s22p63s23p64s23d104p5
B) 1s22s22p63s23p64s23d104p6
C) 1s22s22p63s23p44s23d104p5
D) 1s22s22p63s23p64s23d94p5
Answer: A) 1s22s22p63s23p63d104s24p5
Answer:
A
Explanation:
right on edge
Fill in the coefficients that will balance the following reaction:
__H2+__O2 —> __H₂O
Answer:
2H2+1O2—>2H2O
Explanation:
2H2+1O2—>2H2O
Answer:
2H2+1O2-> 2H2O
Explanation:
2h2= 4 hydrogens
1o2= 2 oxygens
///
2 h2O= 4 hydrogens and 2 oxygens
// they are balanced
Why is it impossible for scientists to use macroscopic tools such as scissors to create nanoparticles?.
Nano particles are very small and can not be seen with eyes measuring between 1 to 100 n m. Because of their small size, they can't be made from macroscopic tools.
What are particles?These refers to those particles whose size lie between 1 to 100 n m. They are extremely small and often can not be seen with the eyes.
Owing to the fact that these particles are very small , they can not be created with very large substances.
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When Sulphur dioxide reacts with water the product formed is
Sulphuric acid
Sulphurous acid
Carbonic acid
None of these
Answer:
2 .Sulphurous acid
Explanation:
Sulphur dioxide can dissolve in water to form Sulfurous acid(H2SO3). sulphurous acid is weackly dibasic acid. sulphur dioxide is a major component of acid rain since it mixes with vapour in the atmosphere reacting to produce H2So4 .
Answer:
Sulphuric acid
Explanation:
Sulphuric acid is a major component of acid rain since it mixes with water vapour in the atmosphere, reacting to produce Sulphuric acid.
Hope that helped...
Carbon reacts with oxygen to produce carbon dioxide. What mass of carbon dioxide is produced if 24 grams of carbon reacts completely with 64 grams of oxygen? *
Answer:
88g
Explanation:
Since the total mass of substances used up in the reaction must be equal to the amount of product formed, according to the conservation of mass law, there must be 64 g + 24 g = 88 g of carbon dioxide present after the reaction.
What is the kinetic energy of a toy truck with a mass of 0.75 kg and a velocity of 4 m/s
Answer:
The answer is 6 JExplanation:
The kinetic energy of an object can be found by using the formula
[tex]KE = \frac{1}{2} m {v}^{2} \\ [/tex]
where
m is the mass
v is the velocity
From the question we have
[tex]KE = \frac{1}{2} \times 0.75 \times {4}^{2} \\ = \frac{1}{2} \times 0.75 \times 16 \\ = 0.75 \times 8[/tex]
We have the final answer as
6 JHope this helps you
Acid rain continues to ba a global problem. Acid rain is the generic name given to precipitation that has bee
Answer:
acid rain is the acidification of the clouds and rain due to the pollution in the air
"Acid rain is the generic name given to precipitation that has bee" lol
A chemist has 2.0 mol of methanol (ch3oh). the molar mass of methanol is 32.0 g/mol. what is the mass, in grams, of the sample? 16 grams 30 grams 32 grams 64 grams
The mass, in grams, of the sample of methanol is 64 grams.
What is relation between mass and moles?Mass of any substance will be calculated by using their moles as:
n = W/M, where
W = required mass
M = molar mass = 32.0 g/mol
n = moles = 2 moles
Now we put all these value on the above equation to calculate the mass of methanol as:
W = (2mol)(32g/mol)
W = 64g
Hence, correct option is (4) i.e. 64 grams.
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The answer to this question is option D: 64 grams
Explanation: Got 90% on the quiz on edge and got this answer right
Juan Carlos placed 35 grams of ke into a dry, 200-gram container. The top of the container was attached tightly. When the ice was completely melted, the student
A.35
B.165
C.200
D.235
20 POINTS!!
Juan Carlos placed 35 grams of ke into a dry, 200-gram container. The top of the container was attached tightly. The mass of liquid water in the container is the same as ice. Therefore, the option A is correct.
What do you mean by mass ?The amount of matter in a particle or object is represented by mass (symbolized m), which is a dimensionless quantity. The kilogram is the International System (SIstandard )'s unit of mass (kg).
Mass is a quantitative measure of inertia and a fundamental property of matter. It is the resistance that a body of matter offers to change in speed or position when force is applied. The smaller the change produced by an applied force, the greater the mass of the body.
Because the number of particles does not change during a change of state, mass does not change. It makes no difference whether a substance freezes, boils, melts, or sublimates.
Thus, option A is correct.
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How many moles of kno3 are in 500.0 ml of 2.0 m kno3? mol kno3
Answer:
1mole
Explanation:
The concentration of a substance is the amount of the solute present in a given quantity of solution. It is the number of moles of the solute in 1 L of the solution. Here the number of moles is 4.
What is a mole?One mole of a substance is defined as that quantity of it which contains as many entities as there are atoms exactly in 12 g of carbon - 12. The formula used to calculate the number of moles is:
Number of moles = Given mass / Molar mass
The equation connecting concentration, volume and the number of moles is:
n = C / V
n = Number of moles
C = Concentration
V = Volume
1L = 1000 mL
500 mL = 0.5 L
n = 2.0 / 0.5 = 4
Thus the number of moles is 4.
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pretty sure its easy but i cant-
Answer:
Tryptophan is an essential amino acid that can be found in the genetic code of humans
I need help on this question
Answer:
brain HSHSHSHSHHSSHSHS
A small crystal is added to a solution and it sinks to the bottom of the beaker. What can this tell you about the original solution?
A.
It is saturated because the crystal will not sink to the bottom of the beaker.
B.
It is supersaturated because the crystal sank to the bottom of the beaker.
C.
It is saturated because when the crystal was added to the beaker, the entire solution turned into a solid.
D.
It is unsaturated because the crystal did not dissolve in the solution.
Which source of power can reduce emission of carbon dioxide?.
Answer:
Applying smart electric grid technologies can potentially reduce CO 2 emissions. Electric grid comprises three major sectors: generation, transmission and distribution grid, and consumption. Smart generation includes the use of renewable energy sources (wind, solar, or hydropower).
Explanation:
hope this helps
What is the density of an object with a mass of 120g and a volume of 60mL?
Answer:
density = 2g/ml
Explanation:
density = mass/volume
mass = 120gh
volume = 60ml
density = 120g/60ml
density = 2g/ml