Answer:
97%.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
SiO2 (s) + 3C (s) —> SiC(s) + 2CO(g)
Next, we shall determine the mass of SO2 that reacted and the mass of SiC produced from the balanced equation. This is illustrated below:
Molar mass of SiO2 = 28 + (16x2) = 60 g/mol
Mass of SO2 from the balanced equation = 1 x 60 = 60 g
Molar mass of SiC = 28 + 12 = 40 g/mol
Mass of SiC from the balanced equation = 1 x 40 = 40 g.
From the balanced equation above,
60 g of SiO2 reacted to produce 40 g of SiC.
Next, we shall determine the theoretical yield of SiC. This can be obtained as follow:
From the balanced equation above,
60 g of SiO2 reacted to produce 40 g of SiC.
Therefore, 50.1 g of SiO2 will react to produce = (50.1 x 40)/60 = 33.4 g of SiC.
Therefore, the theoretical yield of SiC is 33.4 g
Finally, we shall determine the percentage yield of SiC as follow:
Actual yield of SiC = 32.3 g
Theoretical yield of SiC = 33.4 g
Percentage yield =?
Percentage yield = Actual yield /Theoretical yield x 100
Percentage yield = 32.3/33.4 x 100
Percentage yield = 96.7 ≈ 97%
Therefore, the percentage yield of the reaction is 97%.
Which formula can be used to find velocity if kinetic energy and mass are known?
V=
-(KE)(m)
V=
2 m
KE
V=
KE(m)
2 KE
V=
m
Answer:
[tex]v = \sqrt{ \frac{2ke}{m} } [/tex]
option D is the correct option.
Here,
If an object of mass 'm' moving with a velocity'v' then,
[tex]kinetic \: energy = \frac{1}{2} m {v}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: {v}^{2} = \frac{2ke}{m} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: {v}^{2} = \sqrt{ \frac{2ke}{m} } [/tex]
hope this helps...
Good luck on your assignment..
Answer:
it's D on edge2021
Explanation:
Representa la unión iónica entre los siguientes átomos: 1) Bromo y Potasio 2) Calcio y Oxígeno 3) Cloro y Magnesio 4) Sodio y Flúor 5) Aluminio y Nitrógeno Ayuda por favoor
Answer:
a. KBr
b. CaO
c. MgCl₂
d. NaF
e. NH₃
Explanation:
a. 2K + Br₂ = 2KBr
b. 2Ca + O₂ = 2CaO
c. Mg + Cl₂ = MgCl₂
d. 2Na + F₂ = 2NaF
d. N₂ + 3H₂ = 2NH₃
Hexane and hexene are hydrocarbon compounds from different homologous series. the combustion of these two compounds produce different amount of soot. explain the difference based on the percentage of carbon by mass.
Answer:
Percentage of carbon of alkene is higher compared to the alkane that has the same number of carbon per molecule. Because of this, combustion of alkene will produce more sooty flame compared to their corresponding alkane and because Alkenes have a higher percentage of carbon compared to their corresponding alkane.
Explanation:
Relative atomic mass : C= 12 and H=1
Percentage of Carbon Hexane (C6H14)
Percentage of Carbon = 83.7 percent
6(12) x 6(12) +14(1) x 100 percent= 83.7 percent
Percentage of Carbon Hexene = 85.7 percent
A sample of gas is found to occupy a volume of 900cm^3 at 27 degree Celsius, calculate the temperature at which it will occupy a volume of 300cm^3, provided the pressure is kept constant.
Answer:
Explanation:
Here, V1=900cm3, V2=300cm3
T1=(27+273)K=300K, T2=?
Applying Charles's law,
V1T1=V2T2
∴T2=V2T1V1=300cm3×300K900cm3=100K
=100−273=−173∘C
Hope this helps
plz mark as brainliest!!!!!!
all electromagnetic radiation: A. can travel through empty space B. travels at the same speed in a vacuum C.consists of photons D. all of the above
Answer:
A. can travel through empty space
Explanation:
it is said dat electro magnetic waves or radiation travels through the vacuum of space
Answer:
all of the above. Because, Y'know, electromagnetic radiation is like that.
What atom should be balanced last when balancing hydrocarbon combustion
reactions?
A. The oxygen atoms
B. The carbon atoms
C. Any of the three
D. The hydrogen atoms
Answer:
A. The oxygen atoms
Explanation:
A hydrocarbon combustion reaction consist of carbon, hydrogen and oxygen. In balancing the hydrocarbon combustion reaction at first carbon and hydrogen atoms are balanced and at last oxygen atoms are balanced.
Oxygen atoms are balanced at the end because oxygen atom stand alone as O2 and easier to balance than hydrogen and carbon.
Hence, the correct option is "A".
If the value of Kp for N2+3H2...2NH3 is 4/27, then for which of following reaction the value of Kp is reciprocal of above reaction: A. 2SO2+O2...2SO3 B. N2O4...2NO2 C. 2O3...3O2 D. PCI5...PCL3+CL2
Answer:
C. 2O₃ ⇌ 3O₂
Explanation:
Kp is the equilibrium constant calculated from the partial pressures of a gas-phase reaction equation.
For a general gas-phase reaction aA + bB ⇌ nC + xD
the expression for the Kp = (pC)ⁿ(pD)ˣ / (pA)ᵃ(pB)ᵇ
where pA = partial pressure of A; pB = partial pressure of B; pC = partial pressure of C; pD = partial pressure of D
From the given reaction in equilibrium; N₂ + 3H₂ ⇌ 2NH₃
Kp = (pNH₃)² / (pN₂)¹ * (pH₂)³ = 4/7
(pNH₃)² / (pN₂)¹ * (pH₂)³ = (2)²/ (1)¹ * (3)³
Therefore, number of mole of reactants and products is equivalent to partial pressure.
A. 2SO₂ ⇌ O₂ + 2SO₃
pSO₂ = 2, pO₂ = 1, pSO₃ = 2,
Kp = 2²/ (2² * 1²) = 4/4 = 1
B. N₂O₄ ⇌ 2NO₂
pN₂O₄ = 1, pNO₂ = 2
Kp = 2²/1² = 4
C. 2O₃ ⇌ 3O₂
pO₃ = 2, pO₂ = 3
Kp = 3³/2² = 27/4
D. PCl₅ ⇌ PCl₃ + Cl₂
pPCl₅ = 1, pPCl₃ = 1, pCl₂ = 1
Kp = (1¹ * 1¹) / 1¹ = 1
Which refers to the density of the medium’s particles at the compression of a sound wave? A.amplitude B.pitch C.volume D.wavelength
Answer:
A is the answer.
Explanation:
The sound wave is a longitudinal wave which travels in the form of compression and rarefaction . The point where the particles are closer to each other is called compression and the point where the particles are far apart from each other is called rarefaction.
Answer:
Amplitude
Explanation:
Amplitude describes the displacement of the medium's particles. The higher the amplitude, the more dense it is, and the lower the amplitude, the less dense it is.
Pitch is incorrect because it describes the sound
Volume is incorrect because it describes the sound.
Wavelength is incorrect because it describes the distance between a period of a wave.
Space exploration was aided most by the
Explanation:
Space exploration was aided most by the use of liquid fuel.
Hope this helps..
Considere uma molécula de glicose (C6H12O6) e indique: a-) O número de átomos de carbono_____________________ b-) O número de átomos de hidrogênio __________________ c-) O número de átomos de oxigênio ___________________ d-) Quantos átomos teremos ao todo se tivermos 8 moléculas dessa substância? _______ e-) Quantos átomos teremos de cada elemento com 20 moléculas de glicose
Answer:
Considere uma molécula de glicose (C6H12O6) e indique: a-) O número de átomos de carbono = 6 b-) O número de átomos de hidrogênio = 12 c-) O número de átomos de oxigênio = 6d-) Quantos átomos teremos quando descubro se temos 8 moléculas dessa substância?
48 oxigênio, 48 carbono e 96 hidrogênio e-) Quantos átomos de cada elemento teremos com 20 moléculas de glicose?
160 de oxigênio e carbono e 240 de hidrogênio.
Explanation:
A glicose é uma das moléculas mais usadas no organismo humano, pois é uma molécula em que sua decomposição é muito mais fácil que os aminoácidos, portanto, eles produzem como produto a moeda de energia que é ATP mais facilmente do que outros alimentos .
A glicose não é encontrada apenas em alimentos açucarados, isso é um mito, na verdade é a unidade de carboidratos (de assados a doces)
what is the mass of 1.5 mol of aluminum?
Answer:
40.47 g Al
Explanation:
In 1 mol of Al, there are 26.98 grams of Al, so Al is 26.98 g/mol.
Simply multiply 1.5 by 26.98 to get your answer.
A glass cup of orange juice is found to have pOH of 11.40. Calculate the concentration of the hydrogen ions in the juice.
Answer: The concentration of hydrogen ion is 2.5 x 10∧-3.
Explanation:
It is well known that; pH + pOH = 14
∴ pH + 11.40 = 14
pH = 14 -11.40 = 2.60
Remember that,
pH = - Log [ H+ ]
2.60 = - log [H+]
To get the hydrogen ion concentration, we take the anti-log of 2.60.
[H+] = Antilog 2.60 = 2.5 x 10∧-3.
Jack tries to place magnets on his refrigerator at home, but they won’t stick. What could be the reason?
Answer:
The body of the refrigerator isn’t made of magnetic material.
Explanation:
Same reason why a magnet doesn't stick to a paper or a plastic is the reason behind why Jack's refrigerator is acting out because may be it isn't made of magnetic materials like iron, steel etc, but rather made up of non magnetic things like porcelain, wood etc.
HELP! 10 points rewarded, plus, best answer gets BAINLIEST!!
Answer:
4.08 grams
Explanation:
Essentially, we're looking for the mass of HCl that "matches" 3.26 grams of magnesium hydroxide.
First, convert 3.26 grams of [tex]Mg(OH)_2[/tex] into moles by dividing by the molar mass. The molar mass of [tex]Mg(OH)_2[/tex] is 24.3 + 16 * 2 + 1 * 2 = 58.3 g/mol. So, 3.26 grams is equal to:
3.26 g ÷ 58.3 g/mol = 0.0559 mol [tex]Mg(OH)_2[/tex]
Notice that from the chemical equation, magnesium hydroxide and hydrochloric acid (HCl) have a ratio of 1 to 2. In other words, for every 0.0559 moles of [tex]Mg(OH)_2[/tex], there are 0.0559 * 2 = 0.112 moles of HCl.
Finally, convert moles of HCl to grams by multiplying 0.112 by the molar mass, which is 1 + 35.45 = 36.45 g/mol:
0.112 mol HCl * 36.45 g/mol = 4.08 g HCl
The answer is thus 4.08 grams.
~ an aesthetics lover
Why does a perfume bottle burst when placed inside the flame?
Answer:
Explanation:
It is because they contain ethyl alcohol and they are inflammable. The perfume contains alcoholic substances like the ethyl alcohol or the ethanol. After reaching the flash point,the combustion of ethanol takes place inside the bottle and the internal combustion created pressure causes explosion.
Hope this helps
plz mark as brainliest!!!!!!!
Answer:
because they contain ethyl alcohol and they are inflammable.
How many moles of iron (III) hydroxide are produced when 5.0 moles of sodium hydroxide reacts with excess iron (III) chloride? FeCl3 + 3NaOH —> Fe(OH)3 + 3NaCl
Answer:
1.67 moles of iron (III) hydroxide are produced when 5.0 moles of sodium hydroxide reacts with excess iron (III) chloride.
Explanation:
The balanced reaction is:
FeCl₃ + 3 NaOH ⇒ Fe(OH)₃+ 3 NaCl
By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reagents and products participate in the reaction:
FeCl₃: 1 moleNaOH: 3 molesFe(OH)₃: 1 moleNaCl: 3 molesThen you can apply the following rule of three: if 3 moles of NaOH form 1 mole of Fe(OH)₃, 5 moles of NaOH how many moles of Fe(OH)₃ do they form?
[tex]moles of Fe(OH)_{3} =\frac{5 moles of NaOH*1 mole of Fe(OH)_{3} }{3 moles of NaOH}[/tex]
moles of Fe(OH)₃= 1.67
1.67 moles of iron (III) hydroxide are produced when 5.0 moles of sodium hydroxide reacts with excess iron (III) chloride.
Halogens are active non metal
Answer:
True
Explanation:
They are actively non metals due to their electron configuration and number of valence electrons
20
What is the name of this compound?
OH
CH3-CH3 -CH 2 -CH2-CH-CH2
Isohexyl alcohol
hexyl alcohol
tert-hexyl alcohol
sec-hexyl alcohol
tret-hexyl alcohol
Explanation:
its formula is CH3-CH3-CH2-CH2-CH-CH2
DUE IN 30 MINUTES!!! (please keep it short if you can, if not its ok.) What is the molar mass of Pb(SO4)2? Explain how you calculated this value. (4 points)
Answer:
399
Explanation:
Pb(SO4)2 contains 1 atom of Pb, 2 atoms of S and 8 atoms of O. So, atomic mass of Pb(SO4)2 is 207 + 64 + 128 = 399 u. Therefore, molar mass of Pb(SO4)2 is 399 g/mol.HOPE THIS helps. Good Luck
Answer:
The molar mass of Pb(SO₄)₂ is 399.32.
Explanation:
To find the molar mass of Pb(SO₄)₂, you have to find the molar mass of each individual element that makes up the compound.
Let's start by figuring out how many of each element is present in the compound.
Pb (lead) - 1
S (sulfur) - 2
O (oxygen) - 8
(SO₄)₂ is a polyatomic ion. It is written in parentheses followed by a subscript of 2. This means that there are two sulfate ions in the compound. So, the number of sulfur atoms and oxygen atoms doubles. (1 × 2 = 2) and (4 × 2 = 8).
Next, look up the molar mass of each element on a periodic table and multiply it by the number of atoms present.
Pb - 207. 2 × 1 = 207. 2
S - 32.06 × 2 = 64.12
O - 16.00 × 8 = 128
Lastly, add up them all together to get the molar mass.
207. 2 + 64.12 + 128 = 399.32
The initial temperature of a bomb calorimeter is 28.50°C. When a chemist carries out a reaction in this calorimeter, its temperature decreases to 27.45°C. If the calorimeter has a mass of 1.400 kg and a specific heat of 3.52 J/(gi°C), how much heat is absorbed by the reaction?
Answer:
D. 5,170 J
Explanation:
Which type of reaction does this diagram represent? (picture)
Answer:
its A.addition
Explanation:
edg. 2020 other guy is wrong
Which refers to the force that one massive object exerts to attract another object? velocity gravity acceleration newton
Answer:
gravity is the correct answer to the given question .
Explanation:
The gravity is the gravitational force due to the gravitational the solar system as well as the other body of dimensional object to its center point. The gravitational force maintains all the planetary systems in the orbit over the sun.We can called gravitational force as the universal force .
The gravitational force attracts the huge object for grabbing the another object.All the other option are not attracting the another object that's why these are incorrect option .Answer:
the answer is b gravity :)
Explanation:
u got this :)
Lipase is a protein that helps the body break down fats in foods. Lipase is best classified as which type of protein? an enzyme an antibody a structural protein a binding protein.
Its for edg please answer quickly if you can
Answer:
an enzyme
Explanation:
just took it on edge
Lipase is an enzyme protein which contains amino acids that helps the body break down fats in foods.
What is an amino acid?Amino acids are defined as the substances which are considered to be the monomers of proteins.Every amino acid has the same structure consisting of a central carbon which is bonded to an amino group , carboxyl group and a hydrogen.
Each amino acid also has another atom or a group of atoms bonded to the alpha carbon which are also known as the R group or the variable group of the side chain.There are 20 common amino acids present in natural proteins and each amino acid has the same backbone.
The sequence and number of amino acids determines protein's shape,size and also its function. Each amino acid is attached to the other by a covalent bond formed by a dehydration reaction.
Learn more about amino acids,here:
https://brainly.com/question/15687833
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What mass of nickel (Ni) is in a 2.4 Kg sample of propanol if the concentration is 20 ppb ? (atomic mass of Ni = 58.69)
Answer:
The mass of nickel is 48μg
Explanation:
Parts per billion is a way to describe small concentrations and is defined as the ratio between μg of solute and kg of solvent.
If a solution of nickel in propanol is 20ppb, contains 20μg of nickel in 1 kg of propanol.
Thus, a sample of 2.4kg of propanol will contain:
2.4kg × (20μg nickel / 1kg) = 48μg nickel
The mass of nickel is 48μgA blacksmith heated an iron bar to 1445 °C. The blacksmith then tempered the metal by dropping it into 42,800 mL of
water that had a temperature of 22.00 °C. The final temperature of the system was 45.00°C. What was the mass of
the iron bar? (Hint: Density of water is 1.00 g/mL) The specific heat capacity for iron is 25.01 J/mol°C.
Answer:
6626 g
Explanation:
Given that:
Density of water = 1.00 g/ml, volume of water = 42800 ml.
Since density = mass/ volume
mass of water = volume of water * density of water = 42800 ml * 1 g/ml = 42800 g
Initial temperature of water = 22°C and final temperature of water = 45°C.
specific heat capacity for water = 4.184 J/g°C
ΔT water = 45 - 22 = 23°C
For iron:
mass = m,
specific heat capacity for iron = 0.444 J/g°C
Initial temperature of iron = 1445°C and final temperature of water = 45°C.
ΔT iron = 45 - 1445 = -1400°C
Quantity of heat (Q) to raised the temperature of a body is given as:
Q = mCΔT
The quantity of heat required to raise the temperature of water is equal to the temperature loss by the iron.
Q water (gain) + Q iron (loss) = 0
Q water = - Q iron
42800 g × 4.184 J/g°C × 23°C = -m × 0.444 J/g°C × -1400°C
m = 4118729.6/621.6
m = 6626 g
Jack tries to place magnets on his refrigerator at home, but they won’t stick. What could be the reason?
Answer:
The reason might be that the material that the fridge is made out of is not magnetic, meaning that it's not attracted to metal.
When sugar is added to a sugar solution, the sugar does not dissolve. Which
term describes the original sugar solution?
O A. Semisaturated
O B. Supersaturated
C. Saturated
D. Unsaturated
Answer:Supersaturated
Explanation:The answer is supersaturated because supersaturation is a solution that contains more than the maximum amount of solute that is capable of being dissolved at a given temperature. It is supersaturated because there is already a sugar solution and adding another sugar is more than the maximum amount of solute.
Electrical potential is the amount of energy that is available to do what?
A.
attract atoms to each other
B.
move atoms from one half cell to another half cell
C.
move electrons from anode to cathode
D.
move electrons from cathode to anode
C.
move electrons from anode to cathode
Step-by-step Explanation
Electrical potential is the amount of energy that is available to move electrons from anode to cathode
Answer:
move electrons from anode to cathode
Explanation:
Plato
1) In 1.31 g of a chloride of titanium, there is 0.528 g of titanium. What is the empirical formula of this titanium chloride?
Answer:
TiCl2
Explanation:
Mass of the chloride of titanium= 1.31 g
Mass of titanium= 0.528 g
Therefore mass of chlorine = 1.31-0.528 = 0.782 g
To determine the empirical formulae of the titanium chloride, divide the mass of each element by its relative atomic mass and divide through by the lowest ratio.
Ti- 0.528/48 = 0.011, Cl- 0.782/35.5 = 0.022
Ti- 0.011/0.011 , Cl- 0.022/0.011
Ti- 1, Cl-2
Hence the required empirical formula is TiCl2
newborn reflexes... A. are consciously controlled behaviors B. are unique to each individual newborn C. have little impact on development D. contribute to infant survival
Answer:
The correct answer to the following question will be Option B.
Explanation:
To survive, newborns don't require reflexes. Even though their perceptions were already improving performance, they don't rely on visual stimulation because it was too abstract for them so you can't even guess whose stimulus they're going comes to choosing.The reflexes between each child are special. Each one of them has its own.For instance, its action has always been designed to suck quickly.
Some other choices being made aren't linked to the circumstance. The second Scenario would have been the right choice.