Answer:
6.61 L
Explanation:
M1 = 6.25
V1 = 15.58
M2 = 14.73
M1V1 = M2V2
(6.25)(15.58) = (14.73)V2
V2 = 6.61 L
Drag each label to the correct diagram.
In your school’s chemistry lab, you use a U-shaped apparatus with a semipermeable membrane at the bottom to test the osmotic pressure of two different substances dissolved in water. The substances you test are 1.0 molar ammonia (NH3) and 1.0 molar hydrochloric acid (HCl). As a control, you also test the osmotic pressure of pure water.
Which substance produced which result?
Answer:
left = HCl
Middle = NH3
Right = water
Explanation:
HCl is a strong acid so it will have the strongest effect
NH3 is a weak acid so it will have a small effect
Water has no effect
0.225L solution of H2CO3 is neutralized by 0.0880L of a 1.22 M Fe(OH)3 solution. What
is the concentration of the H2CO3 solution?
Answer:
0.716
Explanation:
First, write the balanced equation:
3 H2CO3 + 2 Fe(OH)3 ----> Fe2(CO3)3 + 6 H2O
Second, go from the molarity of H2CO3 to liters of Fe(OH)3
(Pull mole ratio from balanced equation)
1.22/1L x 0.0880/1 x 3molH2CO3/2molFe(OH)3 x 1/0.225L
Use calculator, and you end up with 0.7157333
Round to 0.716
What is the energy of a photon that emits a light of frequency 4.47 x 10^14 Hz?
A. 6.71 x 10^-19 J
B. 6.75 x 10^-19 J
c. 1.34 x 10^-19 J
D. 2.96 x 10^-19 J
Answer:
2.96 x 10^-19 J
Explanation:
I just took the test
nonmetals and metals do different things when it comes to their valence electrons. one seeks to gain and the other lose. which is which?
Metals wish to lose valence electrons and nonmetals wish to gain valence electrons.
pls help me ASAP
its very urgent
Answer:
C Region
Explanation:
C Region contains all the liquids as 0 °C is the freezing point of water (Crystals of water are formed leaving it no more in the liquid state) and 100 °C is the boiling point (The water boils leaving it no more in the liquid state).
Hence, All liquids are contained in the C region.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807helppppppp plzzzzzzz
Answer:
is this done on a chrombook? it looks like it pls i need points to get to 1000 points so please just leave my answer
Explanation:
A decrease in the height of the mercury column usually means the coming of a.
Answer:
Low-pressure system and clear weather.
Explanation:
What is the total pressure of a gas mixture containing partial pressures of
0.23 atm, 0.42 atm, and 0.89 atm?
A. 1.54 atm
B. 0.89 atm
C. 0.42 atm
D. 0.51 atm
SUBM
Answer:
1.54 atm
Explanation:
By Dalton's Law Of partial pressure,
Total Pressure = Sum of all partial pressures
So,P= P1 + P2 + P3
Therefore, P=0.23+0.42+0.89
=1.54 atm
How many atoms are in 3 NaCl?
Explanation:
Sodium Chloride or NaCl is made up of two elements, sodium (or Na) and chlorine (or Cl). A molecule of sodium chloride, NaCl, consists of one atom each of sodium and chlorine. Hence, each molecule of NaCl has 2 atoms total.
how many grams is needed to make the following solution?
Answer:
c
Explanation:
yxyyyxyxxyxxy yy y gg ff ff d d f t r rr rr rr rr r r t tt t
Find the w/w% of a solution that contains 10 grams of solute and 100 grams of solvent
Answer:
I think the w/w% of this question is 10.
The w/w% of a solution that contains 10 grams of solute and 100 grams of solvent is 9.09%
What is mass percentage % ?Mass percentage is another name of w/w % or weight /weight % .
To determine the weight/weight % of a solution :
we divide the mass of solute by mass of the solution (solute and solvent together) and multiply by 100 to obtain per cent.
[tex]\dfrac{w}{w} \; \%\; =\;\rm\dfrac{mass \;of\; solute}{mass\; of \; solute\;+\;mass\;of\;solvent} \times 100[/tex]
It is given that , mass of solute = 10 grams and mass of solvent = 100 grams
So,
[tex]\dfrac{w}{w} \; \%\; =\;\rm\dfrac{10}{10+100} \times 100[/tex]
[tex]\dfrac{w}{w} \; \%\; =\;\rm\dfrac{10}{110} \times 100\\\\\dfrac{w}{w} \; \%\; =\;\rm\dfrac{100}{11}\\\\\dfrac{w}{w} \; \%\; =\; 9.09 \;\%[/tex]
The w/w% of a solution that contains 10 grams of solute and 100 grams of solvent is 9.09% .
To know more about mass percentage :
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Calculate the grams of Fe(OH)3 produced when you mix 53.68 mL of a 0.46 M solution of NaOH with excess FeCl3 and they react according to the following reaction:
NaOH + FeCl3 --> NaCl + Fe(OH)3
Answer:
What mass of a 4.00% NaOH solution by mass contains 15.0 g of NaOH? What is the molar concentration of Ca2+ ions in a water sample with a. If the solution has a density of 0.9956 g/mL, calculate the molarity of the solution. g of codeine, C18H21NO3, in 125.5 g of ethanol, C2H5OH; 25 g of I2 .
Explanation:
sorry if wrong
What is the pOH of a 3.0 x10-3 M NaOH solution?
pOH =
Answer:
2.5
Explanation:
From the question given above, the following data were obtained:
Molarity of NaOH = 3.0x10¯³ M
pOH =?
Next, we shall determine the concentration of the hydroxide ion in the solution. This can be obtained as follow:
NaOH (aq) —> Na⁺ (aq) + OH¯ (aq)
From the balanced equation above,
1 mole of NaOH produced 1 mole of OH¯.
Therefore, 3.0x10¯³ M NaOH will also produce 3.0x10¯³ M OH¯.
Finally, we shall determine the pOH of the solution. This can be obtained as illustrated below:
Concentration of hydroxide ion [OH¯] = 3.0x10¯³ M
pOH =?
pOH = – Log [OH¯]
pOH = – Log 3.0x10¯³
pOH = 2.5
Thus, the pOH of the solution is 2.5
If you say an object is hot, you are feeling the transfer of
a. chemical energy
b. thermal energy
c. potential energy
d. kinetic energy
Answer:
The answer to your question is B
You finally earn your drivers license and are extremely excited to start driving! It is the middle of winter and all 4 tires on your car look like the air level is low. After checking for air leaks you have found none. The last time you filled the tires was summer. What is the reason for the low pressure?
Answer: Tires air condenses and when it condenses it takes up less room.
Explanation: Hope that helps!
Select the correct answer. Two charged objects, A and B, exert an electric force on each other. What happens if the distance between them is increased? A. The charge on B decreases. B. The charge on B increases. C. The electric force between them decreases. D. The electric force between them increases.
Answer:
The electric force between them decreases
Explanation:
The force between two charged particle is given by :
[tex]F=\dfrac{kq_1q_2}{r^2}[/tex]
Where
r is the distance between charges
If the distance between the charges is increased, the electric force gets decreased as there is an inverse relation between force and distance.
Hence, the correct option is (c) "The electric force between them decreases"
Which of the following is the correct Lewis dot structure for F2?
Answer:b
Explanation:
Correct dot
Which is NOT part of the male reproduction system of a flower? stamen pollen anther pistil
Answer:
Pistil
Explanation:
I believe it is the pistil, because the pistil is part of the female reproductive system of a flower. A stamen is for the male reproductive system.
2) What is an atom? Name and give the charges of the three particles inside the atom.
A car moved 60 m East and 90 m West. What is the distance? *
the answer would be 150 m because you just add 60 and 90
PLS HELPP ...All alkali metals react with water to produce hydrogen gas and the corresponding alkali metal hydroxide
A typical is that between lithium and water: 2Li(s) + 2H2O(l) 2LiOH(aq) + H2(g)
(a) How many moles of H2 can be formed by the complete reaction of 6.23 moles of Li with
water?
(b) How many grams of H2 can be formed by the complete reaction of 80.57 g of Li with
water?
Answer:
A) 3.115 mol
B) 11.60 g h2
Explanation:
From the equation
2 mol Li gives 1 mol H2
Then 6.23 gives??
6.23 /2 = 3.116 mol H2
B) moles of Li =mass! molar mass
= 80.57/ 6.941 = 11.6 mol Li
Then moles of H2 = 11.6 /2 = 5.8 mol H2
Mass of H2 = mol * molar mass
5.8*2 =11.6 g h2
The moles of hydrogen formed with 6.23 moles of Li have been 3.115 moles. The mass of hydrogen formed with 80.57 grams of Li has been 11.60 grams.
From the balanced chemical equation,
2 moles Li = 1 mole Hydrogen
(a) The given moles of Li = 6.23 mol .
6.23 mol of Li = [tex]\rm \dfrac{1}{2}\;\times\;6.23[/tex] moles of hydrogen
6.23 mol Li = 3.115 moles of hydrogen.
The moles of hydrogen formed with 6.23 moles of Li have been 3.115 moles.
(b) The moles can be expressed as:
Moles = [tex]\rm \dfrac{weight}{molecular\;weight}[/tex]
Moles of Li in 80.57 grams:
Moles of Li = [tex]\rm \dfrac{80.57}{6.941}[/tex]
Moles of Li = 11.60 moles
The amount of Hydrogen formed:
2 moles Li = 1 mole Hydrogen
11.60 mol of Li = [tex]\rm \dfrac{1}{2}\;\times\;11.60[/tex] moles of hydrogen
11.60 mol Li = 5.803 moles of hydrogen.
Mass = moles × molecular mass
Mass of 5.803 moles of Hydrogen = 5.803 × 2
Mass of hydrogen = 11.60 grams
The mass of hydrogen formed with 80.57 grams of Li has been 11.60 grams.
For more information about the moles formed, refer to the link:
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A sample of 2.0 moles of helium gas is contained in a tank with a volume of 5.0L at a temperature of 25°C. What is the pressure of the gas in the tank
in atm?
Given: R = 0.0821 L.atm/mol.K
O 9.8 atm
O 0.00069 atm
O 0.82 atm
O 0.0082 atm
Answer: Pressure of the gas in the tank is 9.8 atm.
Explanation:
Given: Moles = 2.0 moles, Volume = 5.0 L
Temperature = [tex]25^{o}C = (25 + 273) K = 298 K[/tex]
Formula used to calculate pressure is as follows.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant = 0.0821 L atm/mol K
T = temperature
Substitute the values into above formula as follows.
[tex]PV = nRT\\P \times 5.0 L = 2.0 mol \times 0.0821 L atm/mol K \times 298 K\\P = \frac{2.0 mol \times 0.0821 L atm/mol K \times 298 K}{5.0 L}\\= 9.8 atm[/tex]
Thus, we can conclude that pressure of the gas in the tank is 9.8 atm.
A car is moving at a speed of 55 km/h. is it possible to calculate the car's kinetic energy on this information? 1 no. we also need to know the car's mass 2 yes. kinetic energy is equal to half of the square of the car's speed 3no. we also need to know the direction motion of the car 4. yes. kinetic energy is equal to the square of the car's speed
NO LINKS PLS!!!!! ILL REPORT YOU
Answer:
the answer is 1; no, you also need to know the car's mass.
Explanation:
Where do CFCs come from?
A:spray cans
B :fire extinguishers
C:Air conditioner
D: manufacturing foams
Or all above
Answer:
all of the above
Explanation:
Answer:
All of the above
Explanation:
Prior to the montreal CFC production ban, all of these products released CFCs into the atmosphere. Some old air conditioner still release CFC so please be sure to dispose of them as CFC kills the ozone layer.
~I will give the brainliest~
How does temperature affect the rate constant for a reaction?
A. increasing temperature exponentially increases the rate constant
B. increasing temperature linearly increases the rate constant
C. increasing temperature exponentially decreases the rate constant
D. increasing temperature linearly decreases the rate constant
E. temperature has no effect on the rate constant
HEELLLP
How many liters of hydrogen gas, at STP, are required to produce 2.50 x 1022 molecules of CH4? C + 2H2 → CH4
Answer:
1.8 L
Explanation:
According to Avogadro;
1 mole of CH4 contains 6.02 * 10^23 molecules of CH4
x moles of CH4 contains 2.50 x 10^22 molecules of CH4
x = 1 * 2.50 x 10^22 molecules/ 6.02 * 10^23 molecules
x = 0.04 moles of CH4
2 moles of H2 yields 1 mole of CH4 gas
x moles of H2 gas yields 0.04 moles of CH4
x = 2 moles * 0.04 moles / 1mole = 0.08 moles of H2
x = 0.08 moles of H2
Since 1 mole of H2 occupies 22.4 L
0.08 moles of H2 occupies 0.08 moles * 22.4 L/ 1 mole
= 1.8 L
How many moles of acetylene are needed to completely react with 16.5g of CO2
Answer:
0.375 mols
Explanation:
Relative atomic mass Ar of C=12×1=12Relative atomic mass Ar of O=16×2=32Realitive formula mass Mr is 12+32=44mol:mass
1 : 44
x :16.5
cross multiply and get the answer
Que unidad utilizamos para medir un átomo de oxígeno??
Answer:
Im pretty sure you use mass
Explanation:
Answer:
Los químicos eligen definir la AMU como 1/16 de la masa promedio de un átomo de oxígeno que se encuentra en la naturaleza; es decir, el promedio de las masas de los isótopos conocidos, ponderado por su abundancia natural. Los físicos, por otro lado, lo definieron como 1/16 de la masa de un átomo del isótopo oxígeno-16 (16O).
A chemist observed bubbling and fizzing after adding an acid solution to a
white powdery substance in a beaker. Which of the following can be
inferred?
Answer:
a chemical reaction occured
Explanation:
bubbling and fizzing after adding a substance, most offten means a chemical reaction is happening
PLZ Help asap!!!!
Sulfuric acid is purchased full-strength at 18.0M. How many milliliters of full-strength acid are needed to prepare 500.0 mL of aqueous 0.35M H2SO4? Round your answer to 3 significant figures.
A. 13.4 mL
B. 82.6 mL
C. 9.70 mL
D. 79.0 mL
Answer:
C. 9.70
Explanation:
Hello,
This problem is a simple dilution problem which utilizes the formula M1V1= M2V2 (where M is molarity, V is volume). I have attached a helpful image as well.
M1 V1 = M2 V2
(18) (x) = (0.35) (500)
x = 9.72mL which is close enough to option C.