Answer:
I answered this in your recent post of this question.
Explanation:
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The equilibrium constant for the reaction shown below is Kc=0.0091. If the equilibrium concentrations of A and B are 0.031 M and 0.0823 M, respectively, what is the equilibrium concentration of C?
Answer:
[tex][C]=0.0221M[/tex]
Explanation:
Hello there!
In this case, according to the given chemical reaction at equilibrium:
[tex]3A\rightleftharpoons 3B+2C[/tex]
It is possible for us to set up the equilibrium expression as shown below:
[tex]Kc=\frac{[B]^3[C]^2}{[A]^3}[/tex]
Whereas Kc, [A] and [B] are known as 0.0091, 0.031M and 0.0823M and it is required to calculate [C]; thus, we solve for it as follows:
[tex][C]^2=\frac{[A]^3Kc}{B]^3}[/tex]
[tex][C]=\sqrt{\frac{(0.031)^3*0.0091}{(0.0823)^3}}[/tex]
[tex][C]=0.0221M[/tex]
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Metals are considered to be ___________________ because they let electricity flow.
Group of answer choices
conductors
circuits
currents
insulators
Answer:
conductors
Explanation:
Because they consist of lattice of atoms with free electrons and these free electrons allows current to flow through.
The student wants to test the conductivity of each solution. Prior to carrying out the investigation, the student needs to identify the variables being controlled and the variables being changed between the two solutions. Which identification of the variables is correct?
Options:
The volume of the solution and the concentration of the solution are being changed between the two solutions, but the number of solute particles is being held constant.
The number of solute particles and the concentration of the solution are being changed between the two solutions, but the volume is being held constant.
The number of solute particles is being changed between the two solutions, but the volume and concentration of the solution is being held constant.
The volume of the solution and the number of solute particles are being changed between the two solutions, but the concentration of the solution is being held constant.
Answer:b
Explanation: the particles will soon dissolve which means that the particles are changing but the volume is staying the same and the concentration is changing
The identification of the variables which is correct is that the number of solute particles is being changed between the two solutions, but the volume and concentration of the solution is being held constant.
What are variables?Variables are defined as any characteristics, number or quantity which can be measured . It can also be called as a data item . It is called as variable because they can vary and can have variety of values.
There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variable which do not change.
Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.
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(view the image) explain your answer please
A student adds 5400.0mL of 0.15M NaOH to 201.2mL of 4.0M NaOH. What is the final [NaOH]?
Answer:
0.287 M
Explanation:
Multiply the concentration of each solution by the volume of each (in liters) to get the moles of NaOH in that solution.
0.15 M • 5.4000 L = 0.81 mol NaOH
4.0 M • 0.2012 L = 0.80 mol NaOH
Add the mol of NaOH together to get the total --> 0.81 + 0.80 = 1.61 mol NaOH
Divide by the total volume of solution (5400.0 mL + 201.2 mL = 5,601.2 mL = 5.6012 L)
1.61 mol / 5.6012 L = 0.287 M NaOH
a substance made up of only atoms of one type is called
Answer: chemical element
Explanation: A chemical element is a substance that contains only one type of atom, which is the smallest particle of an element.
How many grams of Cl are in a 38.0-g sample of the chlorofluorocarbon C2F3Cl3?
12.9 grams of Cl are in a 38.0-g sample of the chlorofluorocarbon C2F3Cl3.
What is chlorofluorocarbon?Chlorofluorocarbon is defined as a gas that was previously widely employed in many items (like aerosols), but is thought to harm the ozone layer in the Earth's atmosphere. Halogen exchange using chlorinated methane's and ethane's as the starting point often produces CFCs and HCFCs. The chlorofluorocarbons undergo free-radical reactions to produce the brominated derivatives, which replace C-H bonds with C-Br bonds.
1 Carbon + 3 Fluorine + 1 Chlorine = CF3Cl
1 × (12.011 g/mol) plus 3 x (18.988 g/mol) + [1 x 35.453 g/mol] 104.428 grams per mole
1 mole per 104.428 grams of 38.0 grams equals 0.364 moles. 0.364% CF3Cl moles 1 mole of Cl and 1 mole of CFCl3 in CF3Cl equals 0.364 moles of Cl.
Chlorine weighs 35.453 grams per mole, so 12.9 grams of chlorine are contained in every 38.0 grams of CF3Cl.
Thus, 12.9 grams of Cl are in a 38.0-g sample of the chlorofluorocarbon C2F3Cl3.
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Number 12 (c) and (d) please help
Answer:
check below
Explanation:
c) Concentrated sulphuric acid is used a drying agent.
d) (use any one of them) Concentrated phosphoric acid, hot aluminium oxide, calcium chloride , anhydrous calcium sulphate
Answer:
12c) it is used as a drying agent
d) anhydrous calcium chloride
calcium oxide can also be used as a drying agent
Why are large crystals of sodium chloride used instead of small
crystals when making ice cream
Answer:
Sodium chloride is added to the ice to lower the freezing point of the ice. Large crystals dissolve more slowly than small crystals. This allows time for the ice cream to freeze more evenly.
Explanation:
Using this illustration, what is the chemical formula? Picture and possible answers are below.
The answer is It is NH3.....
Argon has a pressure of 34.6 atm. It is transferred to a new tank with a volume of 456 L and pressure of 2.94 atm. What was the volume of the original container?
Answer:
38.75 L
Explanation:
From the question,
Applying Boyles Law,
PV = P'V'....................... Equation 1
Where P = Original pressure of the Argon gas, V = Original Volume of Argon gas, P' = Final pressure of Argon gas, V' = Final Volume of Argon gas.
make V the subject of the equation
V = P'V'/P.................... Equation 2
Given: P = 34.6 atm, V' = 456 L, P' = 2.94 atm.
Substitute these values into equation 2
V = (456×2.94)/34.6
V = 38.75 L
Nuclear power:
accounts for half of the energy used in the U.S.
creates less energy than fossil fuels
is a nonrenewable resource
is a renewable resource
Answer:
Is a nonrenewable resource
Explanation:
"The fuel for fusion reactors can be drawn from sea water in an almost unlimited supply. The fuel for fission, on the other hand, comes from a limited supply of uranium. Once it is depleted, it cannot be easily replenished. For this reason, nuclear power is considered a nonrenewable resource."
I got this source from ODY
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Have a nice day
Answer:
is a nonrenewable resource
Explanation:
A gas occupies 10.2 L at 0.986 atm. What is the pressure if the volume increases to 16.0 L?
Answer:
0.629 atm
Explanation:
P1V1 = P2V2
P1 = 0.986 atm
V1 = 10.2 L
P2 = ?
V2 = 16.0 L
Solve for P2 --> P2 = P1V1/V2
P2 = (0.986 atm)(10.2 L) / (16.0 L) = 0.629 atm
a ceiling fan's blades collect dust faster than other objects in a room. the constant pushing and rubbing against the air provide a cool breeze for the people in the room. what causes the ceiling fan´s blade to collect dust so quickly.
As the blades rotate, they experience frictional forces as they `rub' against the air; this knocks electrons around, causing the blades to build up a net charge. The charged dust particles then stick to the charged areas of the blades. "The leading edge of the blades usually develops the thickest layer of dust.
To solve this we must be knowing each and every concept related to dust. Therefore, frictional forces allow the ceiling fan´s blade to collect dust so quickly.
What is dust?Dust stirred up by automobiles on the road may account for 33% overall air pollution. Deposits of vehicle or commercial exhaust gas, particles through tire and braking wear, dust from paved streets or potholes, plus dust from building sites all contribute to road dust.
As the blades revolve, frictional forces cause them to 'rub' against the air, knocking electrons around and allowing the blades to accumulate a net charge. The electrified dust particles are subsequently attracted to the charged portions of the blades. Typically, the sharp end of the blades creates the heaviest coating of dust.
Therefore, frictional forces allow the ceiling fan´s blade to collect dust so quickly.
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Scenario 1: The pitcher throws a fastball down the middle of the plate. The batter takes
a mighty swing and totally misses the ball. The umpire yells, "Strike one!"
Scenario 2: The pitcher throws an off-speed pitch and the batter checks his swing. The
batter just barely makes contact with the ball and it dribbles down in front of the batter's
feet into foul territory. The umpire yells, "Foul ball; strike two!"
Scenario 3: The pitcher throws a curve ball that looks like it might catch the outside
corner of the plate. The batter swings with all his strength, but the bat grazes the
underside of the ball and the ball skews off to the right, flying into the crowd. The umpire
yells, "Foul ball, still two strikes!"
Scenario 4: The pitcher throws another fastball down the middle of the plate. The batter
swings and wallops the ball high into the air and the ball clears the center field wall that
reads 410 feet. The ump yells, "Homerun!"
In which scenario did a chemical reaction occur between reactant A and B?
Question 1 options:
1
2(INCORRECT)
3 (INCORRECT)
4
Answer:
I believe it is scenario 4
Explanation:
Please help me out ........
Answer:c
Explanation:
How many different elements are involved in the reaction shown below?
2Fe + 6HC2H3O2 → 2Fe(C2H3O2)3 + 3H2
There are four. Fe, H, C, and O
A. What do the four quantum numbers describe about an electron? (1 point)
B. Match each quantum number with what it defines about an electron's position
or energy. (2 points)
A. The first quantum number, n
B. The second quantum number, /
C. The third quantum number, m
D. The fourth quantum number, ms
___ Defines the electron's orbital
___ Defines the electron's energy level
___ Defines the electron's spin
___ Defines the electron's sublevel
Answer: Part A / The four quantum numbers tell you the location and energy of an electron.
Part B / _C_ Defines the electron's orbital
_A_ Defines the electron's energy level
_D_ Defines the electron's spin
_B_ Defines the electron's sublevel
A venti latte (502mL) contains 0.322g caffeine, C8H10N4O2, express this concentration in molarity.
Answer:
0.00331M
Explanation:
Molarity of a solution can be calculated as follows:
Molarity = number of moles (n) ÷ volume (V)
In the information provided in this question, the volume = 502mL = 502/1000 = 0.502L, mass of caffeine = 0.322g
Molar mass of caffeine (C8H10N4O2), where C = 12, H = 1, N = 14, O = 16 is as follows:
Molar mass = 12(8) + 1(10) + 14(4) + 16(2)
= 96 + 10 + 56 + 32
= 194g/mol
Using, moles = mass/molar mass
moles = 0.322/194
moles = 1.66 × 10-³ moles
mole = 0.00166mol
Molarity = number of moles ÷ volume
Molarity = 0.00166mol ÷ 0.502L
Molarity = 0.00331M.
4.550 g of Na2SO4 are added to 0.350 L of water. To this solution, 0.085 L of water were added. What is the new concentration of the solution?
Answer:
0.0736 M or 10.4 g/L
Explanation:
First we convert 4.550 g of Na₂SO₄ into moles, using the molar mass of Na₂SO₄:
4.550 g ÷ 142.04 g/mol = 0.0320 molThen we calculate the final volume of the solution:
Final Volume = 0.350 L + 0.085 LFinal Volume = 0.435 LNow we can proceed to calculate the concentration -in molarity- of the solution:
Molarity = moles / liters0.0320 mol / 0.435 L = 0.0736 MIn g/L the concentration would be:
4.550 g / 0.435 L = 10.4 g/LExplain why NH3 has a higher solubility in water than SbHz.
Answer: NH3 has a higher solubility rate than SbH3 because it has much stronger bonds. ... HoCH2CH2OH because it can form two bonds with water compared to the other molecule which can only form one.
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Name the following alkyne:
CH3CH2C = C - CI
Answer:
The answer was be 1-chloro-1-butyne
Explanation:
In other words the answer is option letter A
You welcome have a nice day.
The name of the given alkyne, CH₃CH₂C = C – CI is 1 chloro 1 butyne.
The correct option is A.
What are alkynes?Alkynes are unsaturated hydrocarbons, that have carbon-carbon triple bonds.
Chlorobutyne is colorless and is liquid at room temperature and pressure.
It is polar, but still slightly soluble in water.
Thus, the correct option is A, 1 chloro 1 butyne.
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The reactant which is consumed completely in a reaction is called the excess reactant. TRUE or FALSE
Answer:
False
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An unknown amount of sodium azide (NaN3) reacts and produces 0.033 moles of nitrogen gas. What mass of sodium metal is produced
Answer:
Mass of sodium metal is 130.87 gram
Explanation:
The complete reaction is
2 NaN3 --> 2 Na + 3 N2
We know that PV = nRT
n = [tex]\frac{PV}{RT}[/tex]
On substituting the given values, we get
[tex]n = \frac{\frac{99707}{101325}*75 }{0.082 *(273.15 +15)} \\n = 3.02[/tex]moles of N2
Sodium azide's molar mass
3.02 *(2/3) = 2.013 moles
Mass = 2.03 * 65.01 = 130.87 gram
How many moles of C6H12O6 does 8.2 x 1023 molecules represent
Answer:
i.e. mass of 1 mole of glucose, C6H12O6 = (6 × 12.01 + 12 × 1.01 + 6 × 16.00) g = 180.18 g (using atomic weight data to 2 decimals) 1 mole of carbon atoms weighs 12.01 g and there are 6 moles of C atoms in 1 mole of glucose, so the mass of carbon in 1 mole of glucose = 6 × 12.01 g = 72.06 g.
Why do you think we use heat to dissolve sodium tetraborate?
Answer:
Explanation:90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love u this is irrelevent but idrc lol
Balance the following equation: Fe2O3 + H2O --> Fe(OH)3
A.3,2,1
B.2,2,3
C.1,3,2
D.5,2,10
Answer:
answer is c
Explanation:
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acids are and can destroy your skin and bones
Answer:
This is true.
Explanation:
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What percentage increase did CO2 experience from 1800 to 2004 AD?
The percentage of CO2 increased 48 percent. Hope this helped!
You are explaining how heat transfers. Your friend insists that when you touch something cold, you become cold
Which statement can be used to explain to them what is really occurring?
O Heat transfers to your body from the cold object until they are all at the same final temperature,
O Heat transfers from your body to the cold object until they are all at room temperature,
O Heat transfers to your body from the cold object until they are all at room temperature
O Heat transfers from your body to the cold object until they are all at the same final temperature,
HELP ME PLZZZ
Answer:
its C
Explanation: