Answer:
10g
Explanation:
A sample has 0.2 moles of salt dissolved in 2 L of solution. What is the molarity
Don't put no random answer if you don't know it don't answer it please... TY :)
Molarity is the ratio of the moles and the volume of the solution in liters. The molarity of the 0.2 mole salt is 0.1 M.
What is molarity?The molarity of the solution is the molar concentration of the moles of the solute dissolved in a liter of solution. It is given as,
[tex]\rm Molarity (M) = \rm \dfrac{\text{moles of solute (n)}}{\text{volume (V) in liters}}[/tex]
Given,
Moles (n) of the salt = 0.2 mol
The volume of the solution (V) = 2 L
Substituting values in the above equation:
[tex]\begin{aligned} \rm M &= \dfrac{0.2}{2}\\\\&= 0.1 \;\rm M\end{aligned}[/tex]
Therefore, 0.1 M is the molarity of the sample.
Learn more about molarity here:
https://brainly.com/question/3947967
#SPJ1
Which acid/base pair will give an equivalence point that cannot be predicted solely by a general knowledge of acid and base strength
The acid/base pair that give equivalence point that Cannot be predicted by general knowledge is NaOH and HCI ONH.
What is an Acid and base?An Acid is a substances that is corrosive in nature and turn blue lithmus paper to red which it react with base to produce salt and water.
Acid dissolve metals.
Base is a substance that turn red lihthmus paper to blue and react with acid to produce salt and water.
Therefore, The acid/base pair that give equivalence point that Cannot be predicted by general knowledge is NaOH and HCI ONH.
The question is incomplete as the options were not given. The options were gotten from another website.
Select the correct answer below:
ONaOH and HCI ONH,
HC ONH, and CH, COOH
NaOH and Christmas, COOH
Learn more about acid and base below.
https://brainly.com/question/2506771
Describe an adaptation to a plant's life cycle and explain how this adaptation helps the plant survive. (2 points)
Answer:
Aquatic plants that live underwater have leaves with large air pockets inside that allow the plant to absorb oxygen from the water.
Answer:
. Plant adaptations are changes that help a plant species survive in its environment. Aquatic plants that live underwater have leaves with large air pockets inside that allow the plant to absorb oxygen from the water. The leaves of aquatic plants are also very soft to allow the plant to move with the wave.
Explanation:
how many grams of methane will you have from 3 moles of Sodium Acetate
Answer:
roughly about 246.1?
Explanation:
How many grams of NaCl required to form a 500ml solution with a molarity of 0. 5M , the molar mass of NaCl is 58. 5g/mol?
Answer:
14.625 gm
Explanation:
(x / 58.5 gm) / (500ml /1000 ml) = .5 x = 14.625 gm
to show all work and cancel units as necessary.
the equation: 2CH4 + 130₂→ 8CO₂ + 10H₂O
How many moles of Carbon Dioxide can be produced if you begin the reaction with 4
moles of methane (CH4)?
How many moles of water can be produced if you begin the reaction with 4 moles of
methane (CH₂)?
How many moles of Oxygen gas will it take to produce 126 moles of water?
Answer:
Explanation:
1) For every 2 moles of methane consumed, 8 moles of carbon dioxide are produced. This means that if 4 moles of methane are consumed, the reaction can occur twice, meaning 8(2)=16 moles of carbon dioxide will be produced.
2) For every 2 moles of methane consumed, 10 moles of water are produced. This means that the reaction can occur twice, and hence 10(2)=20 moles of water will be produced.
3) For every 10 moles of water produced, 13 moles of oxygen gas are consumed. This means that if we want 126 moles of water, we need the reaction to occur 12.6 times, and thus 13(12.6)=163.8 moles of oxygen gas will be consumed.
Under which of the following conditions of temperature and pressure would 1.0 mol of the real gas CO2(g) behave most like an ideal gas?
(1) 100 K and 0.1 atm
(2) 100 K and 10 atm
(3) 500 K and 0.1 atm
(4) 500 K and 10 atm
(5) none of above
Answer:
c. 800 K, 0.1 atm
Explanation:
Good luck in AP Chem
If the concentrations of a weak acid and its conjugate base are increased from 0.1 M and 0.05 M, respectively, to 0.2 M and 0.1 M, the solution's buffer capacity will _________.
If we increase the concentrations of a weak acid and its conjugate base by the amounts shown, the buffer capacity will remain the same.
What is buffer capacity?The term buffer capacity is generally used to describe how much of the acid or base that can be neutralized by a buffer before there can be a change in the pH.
In this case, if we increase the concentrations of a weak acid and its conjugate base by the amounts shown, the buffer capacity will remain the same.
Learn more about Buffer capacity:https://brainly.com/question/24188850
#SPJ1
Consider an atom having four distinct energy levels. If an electron is able to make transitions between any two levels, how many different wavelengths of radiation could the atom emit?.
Energy levels are the electron shells where electrons are found at a fixed distance from the nucleus of the atom. The atom could emit 6 different wavelengths.
What is wavelength?
A wavelength is a distance between the adjacent crests in wave signals propagated in a system. Wavelength [tex](\rm \lambda )[/tex] is in inverse relation to the frequency of the wave.
When an electron jumps from energy level 1 to 2, 1 to 3, and 1 to 4 one wavelength each is present. Hence, making the total wavelength to be 3, in transition from the first energy level.
Similarly, from energy levels, 2 to 3 and 2 to 4, a total of 2 wavelengths, and from energy levels 3 to 4 one wavelength is produced.
So the total different wavelengths of the radiation that can be emitted will be 3 + 2 + 1 = 6.
Therefore, 6 different wavelengths of radiation will be emitted by the atom.
Learn more about wavelengths here:
https://brainly.com/question/21419520
#SPJ1
How many moles of water are produced from the following reaction, when 275 kJ of energy is given off?
4 NH3 + 3 O2 → 2 N2 + 6 H2O ΔH = -1530 kJ
The moles of water are produced from the given reaction, when 275 kJ of energy is given off is 1.08 moles.
How do we calculate moles of water?The mole (symbol mol) is the SI base unit of material quantity. The amount of substance in an object or sample is a measure of how many elementary entities of a certain substance are present.
Given chemical reaction is:
4NH₃ + 3O₂ → 2N₂ + 6H₂O
From the stoichiometry of the reaction it is clear that 6 moles of water molecule is produced.
Actual moles will be calculated by using the enthalpy and energy value as:
Actual moles of H₂O = 275kJ × (6 mol H₂O)/1530kJ) = 1.08 moles.
Hence required moles of H₂O is 1.08 moles.
To know more about moles, visit the below link:
https://brainly.com/question/19099163
#SPJ1
A gas sample has a volume of 30.0 mL at a pressure of 1.53 atm. If the volume increases to 50.1 mL and the temperature remains constant, the new pressure in atms will be
At constant temperature, if the volume of the sample of gas increases to the given value, the pressure decreases to 0.92atm.
Boyle's lawBoyle's law simply states that "the volume of any given quantity of gas is inversely proportional to its pressure as long as temperature remains constant.
Boyle's law is expressed as;
P₁V₁ = P₂V₂
Where P₁ is Initial Pressure, V₁ is Initial volume, P₂ is Final Pressure and V₂ is Final volume.
Given the data in the question question;
Initial volume of the gas V₁ = 30.0mL = 0.03LInitial pressure of the gas P₁ = 1.53atmFinal volume of the gas V₂ = 50.1mL = 0.0501LFinal pressure of the gas P₂ = ?We substitute our given values into the expression above to determine the new pressure.
P₁V₁ = P₂V₂
P₂ = P₁V₁ / V₂
P₂ = ( 1.53atm × 0.03L ) / 0.0501L
P₂ = 0.0459Latm / 0.0501L
P₂ = 0.92atm
Therefore, at constant temperature, if the volume of the sample of gas increases to the given value, the pressure decreases to 0.92atm.
Learn more about Boyle's law here: brainly.com/question/1437490
Which molecule is hexanal?
Answer:is A.
Explanation:Because six carbon straight chain aldehyde it is clear liquid with an atomspheric pressure boiling point of 131 degree Celsius.
PLEASE HELP ASAP
More info on picture.
This relationship is known as Graham's Law of Effusion. How many times heavier is the heavy gas compared to the light gas?
(In 3a and 3b the heavy gas took 118 seconds while the light gas took 41 seconds)
Answer:
A box of ideal gas has consists of light particles and heavy particles (the heavy ones have 16 times the mass of the light ones).
WILL GIVE BRAINLIEST
Mussels need both Ca2+ and CO32- to make their shells. The data showed that the ocean Ca2+ has not changed, so Ca2+ is not the problem.
To determine the CO32- concentration in the ocean, we can use the DIC measurement and the ocean’s pH.
Use the reaction equation above to answer the question on the relationship between pH and CO32- concentration.
Would a decrease in pH mean an increase or decrease in CO32- concentration?
Answer: Decrease
"Carbon dioxide reacts with seawater to form carbonic acid, which releases hydrogen ions, reducing pH"
Sourced from https://yaleclimateconnections.org/2008/06/covering-ocean-acidification-chemistry-and-considerations/
So basically the ocean is absorbing the CO32- and that lowers the pH as well lowers the amount of CO32- readily available.
This is all I could find on this subject though ;'(
The atomic symbol superscript 206 subscript 82 upper p b. represents lead-206 (pb-206), an isotope that has 82 protons and 124 neutrons. which atomic symbol could represent an isotope that undergoes radioactive decay to produce pb-206? superscript 238 subscript 92 upper u. superscript 222 subscript 87 upper p b superscript 178 subscript 72 upper h f. superscript 192 subscript 77 upper p b.
Answer: The atomic symbol represent an isotope that undergoes radioactive decay to produce Pb-206 can be, Polonium (Po).
What would the concentration of an NaOH solution be if 25 moles were used and 50 L were used?
0. 5 M
0. 5 M
2 M
, 2 M
1250 M
1250 M
25 M
Answer:
0.5 M
Explanation:
To find the concentration, you take the moles and divide that by the liters;
[tex]\frac{moles}{liters} =\frac{25 moles}{50 L} =0.5M[/tex]
I hope this helps!
A scuba tank has a pressure of 195 atm at a temperature of 10ºC. The volume of the tank is 350 L. How many moles of air are in the tank?
Answer:
The answer is 2939 moles.
Explanation:
To obtain the moles from these values you should apply the ideal gas formula because in a scuba tank all gas that you have inside is the air:
PV= nRT. (1)
Thus the moles number, n, is:
n = PV/ RT (2)
Where:
P is pressure: 195 atm;
V is volume: 350 L,
R is gas constant: 0,082 atm×L / mol×K
And T is temperature: 10°C, that must be converted in k, thus:
10°C + 273,15 = 283,15 K
Replacing these values in (2) the moles number, n, is:
2939 moles of air
What is the mass of 3.01 x 10^23 atoms of copper
Answer: There are 31.8 grams of copper.
Explanation:
What is the purpose of adding base in the aldol condensation reaction? choose the best answer.
Base is used in aldol condensation reaction
because it is an organic reaction to form enolate ion, the OH bond present in base help to remove Acidic hydrogen of enolate ion.
Describe the importance of plaster of paris
Answer:
plaster is important because of the many uses you can make out of plaster
After Hunter drank a glass of milk, sugar levels in his blood increased. This stimulated the hormone insulin to be released. Insulin helped the sugar move from his blood into cells, so his blood sugar levels decreased.
Which statement explains what happened next?
Positive feedback caused his pancreas to stop secreting insulin.
Negative feedback caused his pancreas to stop secreting insulin.
Negative feedback caused his pancreas to produce more insulin.
Positive feedback caused his pancreas to produce more insulin.
Answer:
Negative feedback caused his pancreas to stop secreting insulin.
Explanation:
i took the test its correct
A 1 liter solution was diluted to a molarity of 2 M by bringing the volume up to 4 liters. What was the initial molarity of the solution?
Answer:
8.0 mol/L
Explanation:
To do this problem you need to use C₁V₁=C₂V₂. C=concentration and V=volume. (Note: you dont want to use M₁V₁=M₂V₂ because this is measuring mass not concentration).
So, V₁= 1.0L
C₂=2 Mol/L
V₂= 4 L
C₁ is unknown.
you would plug this equation in like this:
(C₁)(1.0 L)=(2.0 Mol/L)(4.0L).
Do algebra to get C₁ alone.
C₁=[tex]\frac{(2.0 mol/L)(4.0L)}{1.0L} =8.0 mol/L[/tex]
The liters cancel out and you are left with mol/L or M
I hope this helps! good luck :)
what is the least measurement of black hole,
Answer:
Here is the correct answerblack hole in ourter space for the first time the scientific research
and development of the following layers lethargic
Explanation:
STUDY CORRECTION.
What is a commission?
A.
taking control of a situation
B.
a military unit
C.
a legal organization
D.
assigned to supervise soldiers
Answer:
B. a military unit
Explanation:
100 POINTS IF ANSWERED CORRECTLY
Think of the composition of each layer of Earth and their relative sizes. Also consider Earth's atmosphere, its oceans, its ice caps, and other materials on its surface. Think about how large or small these parts of Earth are compared to one another. Then complete the following sentence.
Overall, the Earth is made up primarily of: 1. water 2. air 3. soil 4. rock
They are extremely small infront of earth size.
We live in a very small dot like place on earth.The earth size is too big.As we are in dot like we can see objects far biggerBut according to earth It's extremely big than usWhich two factors must be considered when predicting whether two substances will dissolve in each other?
A. number of bonds and size of the molecules
B. number of bonds and molecular shape
C. type of bonds and size of the molecules
D. type of bonds and molecular shape
The two factors must be considered when predicting whether two substances will dissolve in each other are type of bonds and size of the molecules are two factors.
What is solubility?Solubility is the ability of solute particles to dissolve in any solvent, and solubility is directly proportional to the dissolving ability of the solute.
Solubility of any substance depends on the type of the bond present in the solute molecule i.e. polar or non polar. And it is also depends on the size of the solute as size defines the surface tenssion of the substance.
Number of bonds and shape of molecules are also define the solubility but not at that extent as their type and shape.Hence type of bonds and size of the molecules are two factors.
To know more about dissolution, visit the below link:
https://brainly.com/question/26073928
#SPJ1
Please indicate which of the compounds will yield postive results for the permanganate, ninhydrin, and ceric ammonium nitrate tests by placing them in the appropriate boxes.
The compounds will yield Positive results for the permanganate, ninhydrin, and ceric ammonium nitrate tests are
permanganate test= ethene,
ninhydrin=aspasyic acid Phenylalanine
ceric ammonium nitrate test= methanol
What is a compound?Generally, A compound is simply defined as a substance made up of two or more different chemical elements held together by chemical bonds that are difficult to break.
In conclusion, For the permanganate test= ethene,
ninhydrin=aspasyic acid Phenylalanine
ceric ammonium nitrate test= methanol
Read more about Compound
https://brainly.com/question/704297
I need help again :^
Use the model to describe the global pattern of atmospheric circulation.
Why is your model useful for describing winds over the oceans but not necessarily the winds that blow over landforms, such as coastlines and mountains?
Use the model to describe how the unequal heating of Earth and Earth's rotation causes Earth's patterns of atmospheric circulation.
Answer:
#1 Question answer =The global atmospheric circulation model can explain weather patterns and climate by describing how air currents move.
Explanation:
simple but still works.
Answer:
The global atmospheric circulation model can explain weather patterns and climate by describing how air currents move.
Explanation:
this is my answer
Please Please Please help + show the work please! :)
Find the number of grams 9.30 x 10^-3 mole of SmO
Molar mass of SmO or sodium methylate is 160g/mol
Now
No of moles =Given mass /Molar massGiven mass
No of moles ×Molar mass9.3×10^{-3}×1601.488gThe phosphorus atom in pcl3 would be expected to have a:.
The phosphorus atom in Phosphorus trichloride (PCl₃) would be expected to have a partial positive charge.
What is a partial positive charge?A molecule has a partial positive charge when it presents differences in electric charges along the molecule.
A molecule that has a partial positive charge is said to be polar because can generate polar bonds.
Moreover, phosphorus trichloride (PCl₃) is a molecule that forms a colorless substance used in the inorganic chemistry industry.
Learn more about partial positive charges here:
https://brainly.com/question/14992889