Answer:
B. it will take more energy for the particles of the solution to overcome the atmospheric pressure.
Explanation:
i checked the slideshow from educere lol (slide 8 colligative properties lesson)
Boiling point elevation means it will take more energy for the particles of the solution to overcome the atmospheric pressure. Hence, option B is correct.
What is boiling point elevation?The temperature at which a liquid's vapor pressure equals that of the atmosphere is known as the boiling point. A nonvolatile solute solution has a boiling point that is greater than the pure solvent.
Pure water has a boiling point of 100 degrees Celsius, but eating a solute like salt can raise the boiling point. Only the solute's mole fraction determines the boiling point elevation. The molarity of the solution directly relates to the change in boiling point.
With an increase in external pressure, the boiling point rises. High boiling points are the property of liquids with stronger intermolecular forces.
Elevated boiling points indicate that more energy will be required for solution particles to overcome air pressure. As a result, choice B is accurate.
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If the temperature of a gas in the can increases then....
The pressure would increase
OR
The pressure would decrease
Answer:
the pressure would increase with the temperature if it gets to hot the can will explode
PLEASE HELP!! NO LINKS PLEASE REAL ANSWER!!!!!
What will be volume of 20.0 g of CH4 gas at a pressure of 0.950 atm and temperature of 21.0 oc?Question 1 options:
A. 21.8 L
B. 31.8 L
C. 2.27 L
D. 4.27 L
Which of these is a good source of protein?
А
rice
B
bread
с
beans
D
quinoa
Answer:
beans
Explanation:
What is the initial and final mass of the zinc and copper?
Answer:the final mass of copper is 3.84 g. There was an increase in mass of 1.84 g from the initial mass of 2.0 g.
Explanation:
which one of the following is not equal to 100 meters
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What is typical of a grassland? (Select all that apply.)
many trees
grass
wide, open areas
lakes
Answer:grass and wide open areas
Explanation: grassland- large open area of country covered with grass, especially one used for grazing.
Answer:
i needed the answer to this one too
Explanation:
Suppose you needed to explain the concept of the mole to a junior high school student. What would you tell them?
Answer:
Explanation:
duehgjvcujhyeq bvckjfdsaeb gjdksghUIBGREQWMNHGTRE BAGTFEQA
help i will mark brainliest
Answer:
Image A
Explanation:
The hemisphere experiences summer when it is tilted towards the sun. Image a has the northern hemisphere tilted towards the sun.
Answer:
image A
Explanation:
this is because the sun is hitting earth at a steep angle
2+4 help please i will fail 6th grade
Answer:
6
Explanation:
lol
How many grams of octane (C8H18) must be burned to produce 300.0g of CO2?
2 C8H18 + 25 O2 → 16 CO2 + 18 H2O
Answer:
[tex]m_{C_8H_{18}}=85.67gC_8H_{18}[/tex]
Explanation:
Hello there!
In this case, according to the given combustion reaction of octane, it is possible for us to perform the stoichiometric method in order to calculate the mass of octane that is required to consume 300.0 g of oxygen by considering the 2:25 mole ratio, and the molar masses of 114.22 g/mol and 32.00 g/mol respectively:
[tex]m_{C_8H_{18}}=300.0gO_2*\frac{1molO_2}{32.00gO_2}*\frac{2molC_8H_{18}}{25molO_2}*\frac{114.22gC_8H_{18}}{1molC_8H_{18}} \\\\m_{C_8H_{18}}=85.67gC_8H_{18}[/tex]
Regards!
what is solar system
Answer:
Explanation:
The Solar System is the gravitationally bound system of the Sun and the objects that orbit it, either directly or indirectly. Of the objects that orbit the Sun directly, the largest are the eight planets, with the remainder being smaller objects, the dwarf planets and small Solar System bodies
What is the mass of 4 × 1015 atoms of nickel
(Ni)?
Answer in units of g.
What is the correct molecular geometry for NBr2F?
Answer:
Molecular geometry of o3
Ozone has three electron groups around the central oxygen, so has the trigonal planar electron geometry. The molecular geometry is bent: The Effect of Lone Pairs (contd.) With four electron groups (tetrahedral electron geometry), there can be one or two lone pairs around the central atom.
A cylindrical rod of copper (E = 110 GPa) having a yield strength of 240 MPa is to be subjected
to a load of 6660 N. If the length of the rod is 380 mm, what must be the diameter to allow an
elongation of 0.50 mm?
Answer:
required diameter is 7.65 mm
Explanation:
Given the data in the question;
F = 6660 N
l₀ = 380 mm = 0.38 m
E = 110 GPa = 110 × 10⁹ N/m²
Δl = 0.50 mm = 0.0005 m
So, lets assume the deformation is elastic;
d₀ = √( [4l₀F] / [πEΔl] )
we substitute
d₀ = √( [4 × 0.38 × 6660] / [π × (110 × 10⁹) × 0.0005]] )
d₀ = √( 10123.2 / 172787595.947 )
d₀ = √( 5.85875 × 10⁻⁵ )
d₀ = 0.007654 m
d₀ = ( 0.007654 × 1000 )mm
d₀ = 7.65 mm
Therefore, required diameter is 7.65 mm
What are the substances that interact to form new substances in a chemical reaction called?
A. Reactants
B. Products
C. Chemicals
D. Substances
Answer:
A. Reactants
Explanation:
A chemical reaction is the process in which atoms present in the starting substances rearrange to give new chemical combinations present in the substances formed by the reaction. These starting substances of a chemical reaction are called the reactants, and the new substances that result are called the products.
what are the iupac name in yhis picture
Answer:
3-propyl-hepetene.
Explanation:
Hello there!
In this case, according to the given structure wherein an alkene is shown, due to the double bond; as we need to figure out the name we should first number the chain by starting on the bottom carbon having the double bond and ending on the left side as it is the longest chain (parent chain) having seven carbon atoms.
Moreover, we can find a propyl substituent on the third carbon and therefore, the resulting name is:
3-propyl-hepetene.
In agreement to the IUPAC rules.
Best regards!
Compute the number of electrons that each lead atom donates, on average, to a bulk piece of lead metal. Room temperature data for lead: The conductivity of lead is 4.90 × 104 1/(Ω·m) The electron mobility of lead is 2.3 cm2/(V·s) The mass density of lead is 11.4 g/cm3 The atomic weight of lead is 207 g/mol
Answer:
4 electrons/atom
Explanation:
The conductivity of the lead σ = neμ where n = electron density, e = electron charge = 1.602 × 10⁻¹⁹ C and μ = electron mobility of lead = 2.3 cm²/(V·s) = 2.3 × 10⁻⁴ m²/(V.s)
Making n subject of the formula, we have
n = σ/eμ
Since σ = 4.90 × 10⁶ (Ω·m)⁻¹
Substituting the values of the variables into the equation, we have
n = σ/eμ
n = 4.90 × 10⁶ (Ω·m)⁻¹/(1.602 × 10⁻¹⁹ C × 2.3 × 10⁻⁴ m²/(V.s))
n = 4.90 × 10⁶ (Ω·m)⁻¹/(3.6846 × 10⁻²³ Cm²/(V.s))
n = 1.33 × 10²⁹ electrons/m³
We now find the number of moles of lead present in 1 m³ of lead.
So n' = ρ/M where ρ = density of lead = 11.4 g/cm³ = 11.4 g/cm³ × 10⁶ cm³/m³ = 11.4 × 10⁶ g/m³ and M = atomic weight of lead = 207 g/mol
So, n' = ρ/M
N = 11.4 × 10⁶ g/m³/207 g/mol
n' = 0.0551 × 10⁶ mol/m³
n' = 5.51 × 10⁴ mol/m³
Since n' = N/N' where N = number of atoms of lead in 1 m³ of lead and N = Avogadro's constant = 6.022 × 10²³ mol⁻¹
N = n'N' = 5.51 × 10⁴ mol/m³ × 6.022 × 10²³ mol⁻¹
N = 33.18 × 10²⁷ atoms/m³
N = 3.318 × 10²⁸ atoms/m³
So, the number of electron per atom is N" = n/N
= 1.33 × 10²⁹ electrons/m³ ÷ 3.318 × 10²⁸ atoms/m³
= 0.4 × 10¹ electrons/atom
= 4 electrons/atom
it process information and sends instruction? A. brain B. kidney C. heart D. lungs
Answer:
A. brain
Explanation:
every instruction to us is sent by brain
Answer:
A. Brain
Explanation:
It assembles the messages in a way that has meaning for us, and can store that information in our memory.
Be sure to answer all parts. Determine the electron-group arrangement, molecular shape, and ideal bond angle for the following molecule: SO3 Electron-group arrangement: V-shaped (bent) trigonal planar trigonal pyramidal seesaw Molecular shape: bent square pyramidal trigonal planar trigonal pyramidal Ideal bond angle: degrees
Answer:
trigonal planar
Explanation:
The molecule SO3 is of the type AX3. The molecule is symmetrical and non polar.
There are three regions of electron density in the molecule. This corresponds to a trigonal planar geometry. This means that the three oxygen atoms are arranged at the corners of a triangle. The bond angle is 120 degrees.
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What is the weather like in a temperate grassland? (Select all that apply.)
A) summers are mild to hot
B) winters are cold
C) summers are cool
D) winters are mild
Answer:
A. Summers are mild to hot, B. Winters are cold.
One method of increasing the chances of particles colliding during a reaction is to...
1)decrease temperature
2) decrease concentration
3)increasing concentration
4)use a catalyst
Answer:
3
Explanation:
Increasing concentration
Mendeleev found that the properties of the known elements followed a pattern that repeated every
a.7 elements.
b.5 elements.
c.14 elements.
d.10 elements.
Answer:
14 elements
I hope this is correct answer please follow me
Answer:
The answer will be A. 7 elements
Explanation:
I took a test and I got it right hope this helps<3 ^^
How would you prepare 500 ml of the following solutions : Sodium succinate buffer (0.1 mol/dm3 pH 5.64)
Answer:
8.10g of sodium succinate must be added and 247mL of 0.1M HCl adding enough water until make 500mL
Explanation:
Succinic acid has a pKa₂ of 5.63
To solve this question we must find the amount of sodium succinate and 0.1M HCl that we have to add using H-H equation:
pH = pKa + log [A-] / [HA]
5.64 = 5.63 + log [Na₂Succ.] / [HSucc⁺]
0.01 = log [Na₂Succ.] / [HSucc⁺]
1.0233 = [Na₂Succ.] / [HSucc⁺] (1)
As:
0.1M = [Na₂Succ.] + [HSucc⁺] (2)
Replacing (2) in (1):
1.0233 = 0.1M - [HSucc⁺] / [HSucc⁺]
1.0233[HSucc⁺] = 0.1M - [HSucc⁺]
2.033[HSucc⁺] = 0.1M
[HSucc⁺] = 0.0494M
[Na₂Succ] = 0.0506M
Both [Na₂Succ⁺] and [HSucc⁺] ions comes from the same sodium succinate we have to find the moles of sodium succinate in 500mL of 0.1M. Then, based on the reaction:
Na₂Succ + HCl → HSucc⁺ + Cl⁻
The moles of HCl added = Moles HSucc⁺ we need:
Moles Na₂Succ:
0.500L * (0.1mol/L) = 0.0500 moles
Mass -Molar mass sodium succinate: 162.05g/mol-:
0.0500mol * (162.05g/mol) = 8.10g of sodium succinate must be added
Moles HCl:
0.0494M * 0.500L = 0.0247 moles HCl * (1L / 0.1mol) = 0.247L =
And 247mL of 0.1M HCl adding enough water until make 500mL
As the temperature in a sample of gas molecules increases, which of the other properties of the gas molecules could be caused to increase or decrease?
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Which climate condition will cause the fastest chemical weathering of granite sandstone and shale
Answer:
1. Tropical Climate
Explanation:
Due to the high heat in tropical climates, the moisture speeds up chemical weathering
The pollen grain produces a pollen tube that grows down the style, to the ovary, and into the .
Answer:
stem
Explanation:
Only electrons in the __________ orbital can form chemical bonds.
Answer:
Electrons in sigma bonds remain localized between two atoms. Sigma bond results from the formation of a molecular orbital by the end to end overlap of atomic orbitals. Electrons in pi bonds can become delocalized between more than two atoms. Pi bonds result from the formation of molecular orbital by side to side overlap of atomic orbitals.
Which of the compounds shown are structural
isomers of this compound? Check all that apply.
A
B
С
D
Answer:
A & C
Explanation:
The next one is A Edge 2022
The compound which are the structural isomers of the given compound is compound A & C.
What are structural isomers?Structural isomers are those isomers in which which are having the same molecular formula but different structural structures.
Compound A: A is the structural isomer of the given compound as they both have same number of carbon and hydrogen atoms present in that.Compound B: B is not the structural isomer of the given ompound as they have not equal number of carbon and hydrogen atoms in it.Compound C: C is the structural isomer of the given compound as they both have same number of carbon and hydrogen atoms present in that.Compound D: D is not the structural isomer of the given ompound as they have not equal number of carbon and hydrogen atoms in it.Hence A & C are the structural isomers of given compound.
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Reveal the protein to trait example. How did the differences and proteins lead to different traits for this feature.
Please help me no links.
Explanation:
Proteins are responsible for shaping and growth of an organism. Explanation: The differences in proteins lead to different in traits because it is the protein that determines the trait. ... These proteins shaped the structure of organisms so we can say that difference in traits occur due to difference in their proteins.