Answer:
I'm not understand that question
I'm so sorry
You can make a solution (solid solute) more concentrated by
adding more solute
O increasing the pressure
adding more water
adding more solvent
Answer:
increasing the pressure
Explanation:
You can make a solution more concentrated by increasing the pressure.
Is industry pool or flux
Answer:
What is the difference between pools and fluxes?
Image result for Is industry pool or flux
Fluxes describe the movement of energy and matter between different pools. When you pour a glass of juice for yourself, the juice bottle and the glass are both “pools” for the apple juice. The act of pouring it from the bottle to the glass is the flux
Explanation:
In a certain reaction at stp, 29.2 l of methane is combusted
with 63.3 l of oxygen.
what volume of excess reactant remains after the reaction is
complete?
The volume of excess oxygen will 2.28 L
Stoichiometric calculationFrom the equation of the reaction:
[tex]CH_4(g) + 2O_2(g) --- > CO_2(g) + 2H_2O(g)[/tex]
The mole ratio of the two reactants is 1:2.
1 mole of gas at STP = 22.4 L
Mole of 29.2 L of methane at STP = 29.2/22.4 = 1.3 moles
Mole of 63.3 L of oxygen at STP = 63.3/22.4 = 2.8 moles.
Thus, oxygen is in excess because 1.3 x 2 = 2.6 moles is needed to react with 1.3 moles methane.
Excess mole of oxygen = 2.8 - 2.6 = 0.2 moles
Volume of 0.2 moles at STP = 22.4 x 0.2 = 2.28 L
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Describe the difference between the rate of diffusion seen for sodium and urea.
how many grans of NaoH Are needed to neutralize grans of H2So4
Answer :]
to convert from g NaOH to mol NaOH. = 1.48 g NaOH are needed to neutralize the acid.
The pressure of x ml of a gas was increased from 2 atm to 4 atm at constant temperture. what will be the new volume?
The new volume of the gas given the data from the question is 1/2X mL
Data obtained from the question
Initial volume (V₁) = X mL
Initial pressure (P₁) = 2 atm
New pressure (P₂) = 4 atm
New Volume (V₂) = ?
How to determine the new volume
The new volume of the gas can be obtained by using the Boyles’ law equation as illustrated below:
P₁V₁ = P₂V₂
2 × X = 4 × V₂
2X = 4V₂
Divide both side by 4
V₂= 2X / 4
V₂ = 1/2X mL
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31. calculate the amount of energy released as heat by the freezing of 13.3 g of a liquid substance, given that the substance has a molar mass of 82.9 g/mol and a molar enthalpy of fusion of 4.60 kj/mol.
From the calculations, the heat of fusion of the substance is 0.73 kJ
What is is the heat of freezing?The heat of freezing is the energy released when the substance is converted from liquid to solid.
Now we know that the molar mass of the substance is 82.9 g/mol hence the number of moles of the substance is; 13.3 g /82.9 g/mol = 0.16 moles
Now the heat of fusion shall be;
H = 4.60 kj/mol * 0.16 moles
H = 0.73 kJ
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There are 75.0 g of glucose (molar mass = 180 g/mol) dissolved in 250 mL of solution. What is the molarity of this solution?
A. 0.416 M
B. 1.70 M
C. 2.13 M
D. 3.31 M
Answer:
5.6 m which is molarith this solution
How can you measure the volume of air inside of a balloon?
You could let the air out of the balloon while it is under the water with a container filled with water upside down over it. And measure the water displacement.
A sample of radioactive waste has a half-live of 40 years and an activity level of 4 curies. After how many years will the activity level of this sample be 0. 5 curies?
After 160 years, the activity level of the sample will be 0.5 curies.
What is half-life?Half life of any radioactive waste is the half decay of that product.
The formula is [tex]\dfrac{\lambda }{\lambda_1} = 2^\dfrac{a}{b}[/tex]
Where, λ is 4 cruies
λ1 is 0.5 cruies
b = 40 years
Putting the values in the equation
[tex]\dfrac{4}{0.5} = 2^\dfrac{a}{40}\\\\\\\dfrac{a}{40} = 4\\ = 160 years[/tex]
Thus, the correct option is 160 years.
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A solvent is added to dissolve only one mixture component and then the liquids are separated. Choose... A liquid is carefully poured out, leaving the solid behind in the container. Choose... A solid is caught on paper or a membrane while the liquid passes through. Choose... A solid mixture is heated. One component transitions directly between solid and gas. Choose...
The solid would be caught on a filter paper or membrane while the liquid passes through.
FiltrationFiltration is used to separate a mixture of insoluble substances in a liquid.
Since the aim is to separate the insoluble component of the mixture from the liquid, filtration using a suitable filter paper or membrane will be the way out.
The liquid will pass through the filter paper or the membrane while the insoluble component will be caught. This can then be dried and collected accordingly.
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Suppose that 5-ml containers of helium (He), neon (Ne), and argon (Ar) are at pressures of 1 atm,
2 atm, and 3 atm, respectively. The He and Ne are then added to the container of Ar.
a. What is the partial pressure of He in the container after the three gases are mixed?
b. What is the total pressure in the container after the three gases are mixed?
The total pressure in the container after the three gases are mixed is 6 atm and the partial pressure of He is 1 atm.
What is Dalton's Law of Partial Pressure ?According to Dalton's Law of Partial Pressure , the pressure exerted by a mixture of gas is equal to the sum of the partial pressure of the gases in the mixture.
P(total) = p₁ +p₂+p₃+.....
As the volume of the containers are same and the
n = 1*5/RT for Helium
n = 2*5 /RT for Neon
n= 3*5/RT for Argon
Mole fraction = moles of the element/Total moles
Moles fraction of Helium is
[tex]\rm \dfrac{1*5}{1*5+2*5+3*5}[/tex]
= 1/6
Total Pressure in the container = 1 + 2 +3 = 6 atm
The partial pressure of Helium will be
=Mole fraction * Total pressure
=(1/6)*6 atm
= 1 atm , as the volume is same the temperature is same , the pressure will also be same.
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Generally, what is the effect of increased temperature on the rate of dissolution of a solid solute?
Answer:
Increases
Explanation:
The general effect we see as temperature increases is that rate of dissolution of a solid solute increases,
Therefore, we can say that :
Temperature ∝ Rate of dissolution
HELP ASAP PLEASE
The primary cause of water pollution is:
Answer:
the aNSWRER TOP UR QUESTION IS THAT I NMEED TO ANSWER THIS SO I DONT HAVE TO WQATCH ADS LOL
Explanation:
DSADSDASDASDASDSDSDSDSDS and i knowq chem is bio chwem is
9. (05.06 mc)
during an experiment, the percent yield of calcium chloride from a reaction was 80.34%. theoretically, the expected amount should have been 115 grams. what was the actual yield
from this reaction?
caco, + hc - cacl + co, + h20 (5 points)
a. 090.1 grams
b. 92.4 grams
c. 109.2 grams
d. 115.3 grams
The actual yield of the experiment given the data from the question is 92.4 g (Option B)
What is percentage yield?This is the ratio of the actual yield to the theoretical yield of a given reaction multiplied by 100
Percentage yield = (Actual / Theoretical) × 100
What is actual yield?This is the amount obtained from the expriment procedures
What is theoretical yield?This is the amount obtained from simple calculations as regarding the experiment.
How to determine the actual yieldPercentage yield = 80.34%Theoretical yield = 115 gActual yield =?Actual yield = percentage yield × theoretical yield
Actual yield = 80.34% × 115
Actual yield = 0.8034 × 115
Actual yield = 92.4 g
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According to the postulates of kinetic molecular theory, which statement describes the movement of the particles of a liquid?
According to the postulates of kinetic molecular theory, the particles of a liquid are close together and are in constant random motion.
What is the Kinetic theory of matter?The Kinetic theory of matter states that all forms of matter are made up of tiny particles which possess kinetic energy and are in constant state of motion.
The strength of the forces keeping the particles together determines the state in which that substance exists in.
For liquids, the intermolecular forces of attraction between between the molecules are not very strong, and as such, the particles of a liquid are in constant state of random motion.
Therefore, according to the postulates of kinetic molecular theory, the particles of a liquid are close together and are in constant random motion.
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if this strand is replicated what is the complementary strand that is produced
Answer:
During DNA replication, each of the two strands that make up the double helix serves as a template from which new strands are copied. The new strand will be complementary to the parental or “old” strand. Each new double strand consists of one parental strand and one new daughter strand.
Explanation:
hope it helps you
The conductance of the electric current through the electrolytic solution increases with
a)decrease in dilution
b)increase in dilution
c)increase in concentration
d)low degree of ionization
The conductance of the electric current through the electrolytic solution increases with increase in concentration.
What is an electrolytic solution?An electrolytic solution is a solution containing dissolved electrolyte.
The ions of the electrolyte dissociate and are able to carry electric current around the electrolytic cell.
The higher the concentration of the electrolyte, the more electric current it can conduct due to greater number of ions present.
Therefore, the conductance of the electric current through the electrolytic solution increases with increase in concentration.
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What mass of Na2CO3 will be required to dissolve in 0.3 L of water to make a 0.5 M solution?
The mass of [tex]Na_2CO_3[/tex] that will be required to be dissolved in water would be 15.9 grams
Solution preparationRecall that: molarity = mole/volume in L
In this case, the volume is 0.3 L and the molarity is 0.5 M.
Thus, mole = molarity x volume = 0.5 x 0.3 = 0.15 moles
Mass of 0.15 moles [tex]Na_2CO_3[/tex] = 0.15 x 106 = 15.9 grams
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how can you explain that even though you continue to add pure water into a substance, even though the resultant ph might differ a little, the acidity or alkalinity of substance still remains the same to that of substance?
Addition of pure water does not change pH of a solution because pure water has neutral pH.
Why the pH does not change when pure water is added?Even though you continue to add pure water into a substance, the acidity or alkalinity of substance still remains the same to that of substance because pure water has neutral pH which can't change the acidity or alkalinity of a solution.
So we can conclude that addition of pure water does not change pH of a solution because pure water has neutral pH.
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What is the nuclear equation for decay of Am - 241
Americium is a radioactive element .
It goes through alpha decay during nuclear reactions .The nuclear reaction.is given by
[tex]\rm {}^{241}_{95}Am\longrightarrow {}^{237}_{93}Np+{}^4_2\alpha[/tex]
Np stands for NuptuniumHere alpha can be written as He too
Calculate the temperature change of copper metal that has a mass of 43.2 g and is allowed to absorb 1,345 J of heat. The specific heat capacity of copper is 0.385 J/°c g.
Answer: 80.9 K
Explanation:
[tex]Q=mc \Delta T\\\\1345=(43.2)(0.385) \Delta T\\\\\Delta T=\frac{1345}{(43.2)(0.385)} \approx \boxed{80.9 \text{ K}}[/tex]
How many moles of Unknown weak acid (HA) in a 100L solution are required to produce a solution with PH =2 ? Ka of the Unknown weak acid (HA)=5x10⁻³
a. 3x10⁻³
b. 0.3x10⁻³
c. 3
d. 0.3
The moles of unknown weak acid (HA) in a 100L solution are required to produce a solution with pH 2 is 0.002 moles.
What is the equation of the acid dissociation constant, Ka?The acid dissociation constant of an acid is given by the formula below:
[tex]K_a= \frac{[A^{-}][H_3O^{-}]}{[HA]}[/tex]
Where
Ka = 5x10⁻³ pH = 2[H3O+] = 10^-2Volume of solution = 100 mL or 0.1 LSince, the Ka is given at equilibrium concentrations, [H3O+] = [A-]
[A-] = 10^-2
Making [HA] subject of the formula:
[tex][HA]= \frac{[10^{-2}][10^{-2}]}{5 \times 10^{ - 3} } = 0.02[/tex]
Moles of acid = 0.1 × 0.02 = 0.002 moles
Therefore, the moles of unknown weak acid (HA) in a 100L solution are required to produce a solution with pH 2 is 0.002 moles.
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A wave is created by causing vibrations in particles of matter. Which
statement about the wave is true?
The wave which is created by causing vibrations in particles of matter is a mechanical wave.
What is a wave?A wave is a disturbance in a medium which transmits transmits energy from one point to another without a permanent displacement of the particles of the medium.
Types of waves include:
electromagnetic wavesmechanical wavesMechanical waves are waves which are produced as a result of the vibrations of the particles of the medium.
Therefore, the wave which is created by causing vibrations in particles of matter is a mechanical wave.
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A sample of helium gas has a volume of 6.50l at a pressure of 845 mmhg and a temperature of 25oc. what is the pressure of the gas in atm when the volume and temperature of the gas sample are changed to 1850 ml and 325 k
Answer:
4.25atm
Explanation:
[tex]\frac{P1V1}{T1}\\[/tex]=[tex]\frac{P2V2}{T2}[/tex]
where ,
p1 =845/760=1.11atm
v1=6.50l
t1=25c +273k=298k
p2=?
v2=1850/1000=1.85l
t2=325k
so answer is 4.25 atm
How to draw ethyl pentanoate?
Why is it important to convert into units of kelvin before using the ideal gas law?.
Match the following terms:
Answer:
See below ~
Explanation:
A to B
⇒ Solid Phase
==========================================================
B to C
⇒ Melting
==========================================================
C to D
⇒ Liquid Phase
==========================================================
D to E
⇒ Vaporizing
============================================================
E to F and beyond
⇒ Gas Phase
how do you treat a sulfuric acid burn with sodium hydroxide
Balance the following redox reaction if it occurs in acidic solution. What are the coefficients in front of h2c2o4 and h2o in the balanced reaction? mno4⁻(aq) h2c2o4(aq) → mn2 (aq) co2(g)
The balanced redox reaction, if it occurs in acidic solution, is
5C₂O₄²⁻(aq) + 2MnO₄⁻(aq) + 16H⁺-----> 10CO₂(g) + 2Mn²⁺(aq) + 8H₂O(l)
What are redox reaction?Redox reactions are those in which loss and again of electrons occur.
To balance the redox reaction, we must first break the whole reaction into half equations;
Oxidation half equation
[tex]\rm 5C_2O4^2^-(aq) + 10e + 8H^+----- > 10CO_2(g) + 4H_2O(l)[/tex]
Reduction half equation
[tex]\rm 2MnO_4^- (aq) + 10e + 8H^+----- > 2Mn^2+(aq) + 4H_2O(l)[/tex]
Now combine both the reactions
[tex]\rm 5C_2O_4^2-(aq) + 2MnO4^- (aq) + 16H^+----- > 10CO_2(g) + 2Mn^2+(aq) + 8H_2O(l)[/tex]
Thus, the coefficient of H₂C₂O₄ is 5 and that of water is 8.
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