Answer:
Radioactive dating is a method of dating rocks and minerals using radioactive isotopes. This method is useful for igneous and metamorphic rocks, which cannot be dated by the stratigraphic correlation method used for sedimentary rocks. Over 300 naturally-occurring isotopes are known.
Calculate the molarity of (3.25 mol of LiCl in 2.78 L solution
[tex]\text{Morality}= \dfrac{\text{Number of moles}}{\text{Volume}}=\dfrac{3.25}{2.78}=1.169 ~mol/L[/tex]
How do i solve this?
Draw the product of this reaction. Ignore inorganic byproducts.
The compound is formed by addition reaction. The product is showed in the image attached.
Addition reactionThe term addition reaction refers to a type of reaction in which a compound is added across the multiple bond. In this case, the iodine molecule is added to the olefinic bond as shown.
The structure of the product formed has been attached to this answer. The product is formed by addition across the double bond.
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What is molarity of 47.0 g KCl dissolved in enough water to give 375 mL of solution?
This question provides us –
Weight of [tex] \bf KCl [/tex] is = 47 gVolume, V = 375 mL__________________________________________
Molar Mass of [tex]\bf KCl [/tex] –[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf 39.0983 \times 35.453 [/tex]
[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf 74.5513[/tex]
Using formula –
[tex]\qquad[/tex] [tex]\purple{\twoheadrightarrow\bf Molarity _{(Solution)} = \dfrac{ W\times 1000}{MV}}[/tex]
[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf Molarity _{(Solution)} = \dfrac{ 47 \times 1000}{74.5513\times 375}[/tex]
[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf Molarity _{(Solution)} = \dfrac{47000}{27956.7375}[/tex]
[tex]\qquad[/tex] [tex]\twoheadrightarrow\bf Molarity _{(Solution)} = \cancel{\dfrac{47000}{27956.7375}}[/tex]
[tex]\qquad[/tex] [tex] \twoheadrightarrow\bf Molarity _{(Solution)} = 1.68117M [/tex]
[tex]\qquad[/tex] [tex]\pink{\twoheadrightarrow\bf Molarity _{(Solution)} = 1.7M} [/tex]
Henceforth, Molarity of the solution is = 1.7M___________________________________________
There are two varieties in a population of squirrels: short tails and long tails. Long-tailed squirrels are better at jumping and balancing in trees. Scientists observe that over the span of 100 years, the proportion of the population with long tails increases from 10% to 60%. Which statement is most likely? (1 point)
The proportion of long-tailed squirrels may have increased due to a decrease in trees.
The proportion of short-tailed squirrels may have decreased due to an increase in trees.
The proportion of short-tailed squirrels may have decreased due to decreased food availability.
The proportion of long-tailed squirrels may have increased due to increased food availability.
The proportion of long-tailed squirrels may have increased due to increased food availability.
The statement has it that the percentage of long tailed increased also that the long tailed are better at jumping and balancing on trees.
The first option could is tempting but saying decrease in trees would not likely support the argument.
The last option has more sound options as more food availability may lead to population increment
Hope it helps....
What type of reaction is 2NaBr+Cl2-NaCl+Br2
Answer:
An anionic single replacement reaction.
Explanation:
Hope this helps!!!
Answer:
Substitution or Displacement maybe?
How many moles of carbon are present in 1.50mole of aspirin , C_{9}*H_{8} * O_{4}
Given the molecular formula of aspirin, C₉H₈O₄, in 1.50 moles of aspirin there are 13.5 moles of carbon.
What is a mole?The mole is the SI base unit for the amount of matter. 1 mole of particles contains a number of Avogadro's particles.
We have 1.50 moles of aspirin, C₉H₈O₄. According to the molecular formula, the molar ratio of C₉H₈O₄ to C is 1:9.
1.50 mol C₉H₈O₄ × (9 mol C/1 mol C₉H₈O₄) = 13.5 mol C
Given the molecular formula of aspirin, C₉H₈O₄, in 1.50 moles of aspirin there are 13.5 moles of carbon.
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Argon gas has a temperature of 180°C at a pressure of 900 torr. If the gas is heated to 370°C, what is the new pressure of Argon gas in atmospheres (atm)? (Hint: 1 atm = 760 torr)
Based on the calculations, the final pressure of this gas sample at 370°C is equal to 2.66 atm..
Given the following data:
Initial temperature = 180°C.
Final temperature = 370°C.
Initial pressure = 900 torr.
Conversion:
760 torr = 1 atm.
900 torr = 1.29 atm.
How to determine the final pressure.In order to calculate the final pressure of an ideal gas at constant volume, we would apply Gay Lussac's law.
Mathematically, Gay Lussac's law is given by this formula;
[tex]P\;\alpha \;T\\\\P=kT[/tex]
Where:
P is the pressure.T is the temperature.k is the constant of proportionality.Substituting the given parameters into the formula, we have;
[tex]\frac{P_1}{T_1} =\frac{P_2}{T_2} \\\\\frac{1.29}{180} =\frac{P_2}{370} \\\\0.0072 =\frac{P_2}{370}\\\\P_2 = 0.0072 \times 370[/tex]
Final pressure = 2.66 atm.
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Determine whether aqueous solutions of the following salts are acidic, basic, or neutral: (a) Al(NO3)3 (b) RbI (c) KHCO2 (d) CH3NH3Br
The aqueous solution and their respective properties include the following:
Al(NO3)3 - acidicRbI - neutralKHCO2 - basic CH3NH3Br - acidicWhat is pH?This is defined as the degree of acidity or alkalinity of a substance and pH from 1.0 - 6.9 is acidic, 7 is neutral while 7.1 - 14.0 is basic.
The aqueous solutions and their appropriate pH can be seen above which is the right choice.
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What is the mass of 15100 mL of oxygen gas at STP?
Answer:
02 has a mass of 1.78 g.
Explanation:
hope this helps
Determine the difference between archaea and bacteria. (1 point)
All bacteria are unicellular organisms, while some archaea are multicellular.
Archaea live in extreme environments, while bacteria can be found in most places on Earth.
Bacteria and archaea have different shapes.
Archaea is the domain of life that includes the plant and animal kingdoms, while the bacteria domain includes fungi and protists.
Answer:
I have this work and I'm in 5th grade
Explanation:
Answer:
Archaea live in extreme environments, while bacteria can be found in most places on Earth.
Explanation:
Doing a the test now and this is the answer.
298K is equivalent to how many degrees Celsius?
Explain the steps
Answer:
24.80°C
Explanation:
hope it helps...!!!
What is The fmu (grams/mole) for disulfur hexachloride *the formula for it is S2Cl6*
Hexasulfur Dichloride
Name: Hexasulfur Dichloride
Formula: S2Cl6
Molar Mass:276.848
Example Reactions:
• S2Cl6 + 4H2O = 2SO2 + 6HCl + H2
Help please!
__________ is caused by a bacteria that can be transmitted by a flea bite, contact with an infected person, or via airborne droplets. Symptoms are lymph glands that are swollen and painful ("buboes", red spots that turn black)
A ) Tuberculosis
B ) Syphilis
C ) Botulism
D ) Bubonic Plague
Answer:
Bubonic plague is the correct answer!!!
Explanation:
mark me brainliest
Answer:
The answer is Bubonic Plague
What environmental change is shown in the image that might affect the survival of animals
A. Increased space
B. Increased predators
C. Lack of food
D. Pollution
Answer:
it thinks it pollution
Explanation:
hope that helps
2. Water vapor in the atmosphere is the source of
Answer:
Warmth (in addition to sunlight) at the Earth's surface.
Explanation:
Heat radiated from Earth's surface is absorbed by water vapor molecules in the lower atmosphere. The water vapor molecules, in turn, radiate heat in all directions. Some of the heat returns to the Earth's surface. Thus, water vapor is a second source of warmth (in addition to sunlight) at the Earth's surface.
energy contained in the
and
15. The energy transformation in a flashlight is from
battery to
energy in the circuit, to
energy released by the light bulb.
Answer:
yes of course is true the
Calculate the pH of a solution whose pOH is 11.
Answer:
3
Explanation:
pH + pOH = 14
pH + 11 = 14
pH = 3
socraticorgquestionshowdoyoucalculatethephofasolutionwhengiventheohconcentration
Anthony F BRIAN M
if you add 3 mL of water to 1 ml of nadh mix and get an observance of 0.2 what is the concentration of the original nadh solution
Answer:
you are looking at the official nkana fc website
what is safe storage of produced materials
Answer:
Stacking bags and bundles.
Explanation:
Interlock them in rows to ensure they're secure.
Answer:
Material Storage Facilities means an uncovered area used on a permanent basis for outside
Explanation:
Material Storage Facilities means an uncovered area where bulk materials (liquid, solid, granular, etc.) are stored in piles, barrels, tanks, bins, crates, or other means.
Additional Benchmarks for Federal, State, or Municipal Facilities with Incidental Solid De-Icing Material Storage Facilities monitoring under the requirements of subparagraph (D)(ii) above shall not be subject to Benchmark requirements for Chloride or Cyanide.
Directors are fully briefed on all business related matters, risk assessment and new initiatives proposed by the Company.
How can you use a barium chloride solution to help identify a sulfate solution?
answer explanation:
Sulfate ions in solution, SO 4 2 -, are detected using barium chloride solution. The test solution is acidified using a few drops of dilute hydrochloric acid, and then a few drops of barium chloride solution are added. A white precipitate of barium sulfate forms if sulfate ions are present.Answer:
Testing for sulfate ions
Sulfate ions in solution, SO 4 2 -, are detected using barium chloride solution. The test solution is acidified using a few drops of dilute hydrochloric acid, and then a few drops of barium chloride solution are added. A white precipitate of barium sulfate forms if sulfate ions are present.
Explanation:
What volume of .15M NaOH could be produced with only 5 grams of NaOH and water?
The volume of 0.15M NaOH that could be produced with only 5 grams of NaOH and water is 0.83L.
How to calculate volume?The volume of a substance can be calculated using the following expression:
Molarity = number of moles ÷ volume
The number of moles of NaOH can be calculated by dividing the mass of NaOH by its molar mass.
Molar mass of NaOH = 40g/mol
n = 5/40
n = 0.125moles
Volume of NaOH = 0.125mol ÷ 0.15M
Volume = 0.83L
Therefore, the volume of 0.15M NaOH that could be produced with only 5 grams of NaOH and water is 0.83L.
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why is it necessary to standardize a secondary standard before use?
As the name implies, a secondary standard is used by standard laboratories, which include companies involved in the preparation of reagents and kits, as well as laboratories responsible to produce quality control material for use by other laboratories. They use the primary standard as the primary calibrator or primary reference material, and they calibrate their instruments against it. Smaller labs use secondary standards to calibrate control material for analysis of unknown concentrations. For smaller labs, secondary standard serves as an external quality control. As a result, it is essential that the secondary standard be standardized against the primary standard before it can be applied.
I hope this helps you
:)
A reaction rate increases by a factor of 655 in the presence of a catalyst at 37°C. The activation energy of the original pathway is 106 kJ/mol. What is the activation energy of the new pathway, all other factors being equal? Group of answer choices 89.3 kJ/mol 16,600 kJ/mol 89.3 J/mol 16,600 J/mol
For a reaction rate that increases by a factor of 655 in the presence of a catalyst at 37°C, the activation energy of the new pathway is mathematically given as
Ea2=89.28JKoule/mol
What is the activation energy of the new pathway, all other factors being equal?Generally, the equation for the rate constant is mathematically given as
K=Ae^{Ea1/Rt}
Therefore
[tex]\frac{1}{655}=\frac{1}{8.31*3.10}(Ea2-105000)[/tex]
Ea2=89286.083Joule/mol
In conclusion, the activation energy
Ea2=89.28JKoule/mol
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. Calculate how many times greater the change in phosphorous levels between 1965 and 1975 is than between 2008 and 2014. Show your work.
The number of times phosphorous is greater in not visible in the data
How to calculate the change in Phosphorus levelsThe steps involved for calculating the times the change in phosphorus level are :
First step: Determine the difference between Phosphorus levels in 1965 and 1975
Second step: Determine the difference between Phosphorus levels in 2008 and 2014
Last step: Determine the quotient by dividing first step by second step
Hence can conclude that The number of times phosphorous is greater in not visible in the data.
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Attached below is the missing Image related to your question
If 4.65 LL of CO2CO2 gas at 22 ∘C∘C at 793 mmHg mmHg is used, what is the final volume, in liters, of the gas at 35 ∘C∘C and a pressure of 743 mmHg mmHg , if the amount of CO2CO2 does not change?
Answer:
About 7.9 L.
Explanation:
We can utilize the ideal gas law. Recall that:
[tex]\displaystyle PV = nRT[/tex]
Because the amount of carbon dioxide does not change, we can rearrange to formula to:
[tex]\displaystyle \frac{PV}{T}= nR[/tex]
Because the right-hand side stays constant, we have that:
[tex]\displaystyle \frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2} = nR[/tex]
Hence substitute initial values and known final values:
[tex]\displaystyle \begin{aligned} \frac{(793\text{ mm Hg})(4.65 \text{ L})}{(22 \text{ $^\circ$C})} & = \frac{(743 \text{ mm Hg})V_2}{(35\text{ $^\circ$C})} \\ \\ V_2 & = 7.9\text{ L}\end{aligned}[/tex]
Therefore, the final volume is about 7.9 L.
Use the periodic table and example bond table to answer the question.
Example Bond Energies of Ionic Compounds:
Li-F = 1036 kJ/mol
Li-Br = 807 kJ/mol
Na-F = 923 kJ/mol
Na-Br = 747 kJ/mol
Given the general trend with bond energies, which compounds would have the smallest bond energy?
A. Cs-Br
B. K-Br
C. Cs-F
D. K-F
In keeping with the general trends, K-Br will have the smallest bond energy. The bond energy refers to the energy that keeps the atoms in a bond together.
What is bond energy?Bond energy is the energy that is required to hold atoms together in a bond. This energy must also be supplied when the atoms are to be separated.
We have the bond energies of each of the bons in the question, we have to note that the the smallest value of bond energy is Na-Br hence in keeping with the general trends, K-Br will have the smallest bond energy.
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Answer:
Chemistry B Semester Exam 5/4/2023
1. Cs-Br
2. K-C is ionic, and C-O is polar covalent
3. All molecules are in constant motion, so they all have some kinetic energy.
4. The reaction between substances A and B has a lower activation energy than the reaction between substances B and C.
5. More bond energy is absorbed on the reactants side than is released on the products side.
6. an exothermic reaction
7. Endothermic reactions have a higher activation energy. Endothermic reactions require more energy to break up the bonds of the reactants.
8. Heat must be released by the products in order to convert from the reactants.
9. Cooling a purple solution will turn it pink.
10. Both are flexible, but one conducts electricity while the other insulates.
11. high pressure, high-temperature water extraction
12. steel + vanadium for shock absorption
13. 15
14. the number of atoms, type of elements, and mass of reactants and products are equal.
15. 64 grams
16. 1.503x10^23
17. The relative numbers of protons and neutrons can differ before and after the change, but the total number of those particles remains the same.
18. The plastic balls are a good representation of neutrons, but there is no splitting of nuclei as happens in fission.
19. beta minus decay
20. alpha decay
21. Greenhouse gases have more than two atoms, allowing them to vibrate and release radiation, warming the atmosphere.
22. cause: acid rain, consequence: destruction of crops
23. toxic bacteria in the water supply
24. it reaches hard to get to oil and gas deposits.
Procedure for Lab: Enthalpy ?
I have a lab on Edge that's about Enthalpy. The assignment is called " Lab: Enthalpy". If someone could help me with the procedure of the lab, that would be nice. (I don't need the data table, just the procedure.)
The enthalpy refers to the thermodynamic characteristics that have chemical systems associated with their internal energy.
What is enthalpy?The enthalpy refers to the thermodynamic features of the chemical systems associated with the energy of such systems.
Enthalpy is used to estimate the ability of the system to perform work and release energy in the form of heat.
It is well known that different types of chemical reactions may exhibit different enthalpies, which can be estimated by the internal energy, pressure of the system and volume.
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Answer:
Here you are <3
Explanation:
I attached the one I just submitted
Which pictures show the car at zero acceleration? A. Picture 1 only. B. Pictures 1 and 3. C. Picture 2 and 4. D. Picture 4 only.
Picture 1 shows choice B
Explanation:
picture 1 shows the car to which the net force is a zero
Spell out the full name of the compound?
What temperature creates hail
Answer:
32 °F
Formation. Hail forms in strong thunderstorm clouds, particularly those with intense updrafts, high liquid water content, great vertical extent, large water droplets, and where a good portion of the cloud layer is below freezing 0 °C (32 °F).
Explanation:
brainlist me and that's all I know and we have the same module I guess