The mercury level in a capillary tube placed in a dish of mercury is actually below the surface of the mercury in the dish. Please choose the answer that best explains the phenomenon.a. Mercury flows freely and is incapable of clinging to the walls of the capillary tube. b. Mercury has an incredibly high density for a liquid, making it too heavy to climb the capillary tube, c. The cohesive forces of mercury are much stronger than its adhesive forces. The adhesive forces may be repulsive, causing the mercury level in the tube to be lower than the mercury in the dish. d. Mercury is a polar molecule. It creates incredibly high cohesive forces, which prevent the mercury from climbing the capillary tube.

Answer:

Oxygen reduction reaction

Explanation:

Pt is used as the catalyst for both the hydrogen oxidation reaction (HOR) occurring at the anode and the oxygen reduction reaction (ORR) at the cathode. Usually, the Pt catalyst takes the form of small particles on the surface of somewhat larger carbon particles that act as a support.

Considering the ideal gas law, the volume occupied by 3.25 moles of an ideal gas at a temperature of 18.00°C is 686.71 L.

An ideal gas is the behavior of those gases whose molecules do not interact with each other and move randomly. Under normal conditions and under standard conditions, most gases exhibit ideal gas behavior.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T), related by a simple formula called the ideal gas law:

P×V = n×R×T

Where:

In this case, you know:

Replacing in the ideal gas law:

1.13 atm×V = 3.25 mol× 0.8205 L.atm/K.mol× 291 K

Solving:

V = (3.25 mol× 0.8205 L.atm/K.mol× 291 K)÷ 1.13 atm

V= 686.71 L

Finally, the volume is 686.71 L.

Learn more about ideal gas law:

https://brainly.com/question/4147359

#SPJ1

The molarity of a solution that contains 35.00 g of CuSO4 dissolved in 250.0 mL of water is 0.88M.

The molarity of a solution can be calculated using the following formula:

Molarity = no of moles/volume

According to this question, a solution consists of 35.00 g of CuSO4 dissolved in 250.0 mL of water.

no.of moles of CuSO4 = 35g ÷ 159.6g/mol

no. of moles of CuSO4 = 0.22 moles

Therefore; molarity of CuSO4 solution is calculated as follows:

M = 0.22 ÷ 0.25

M = 0.88M

Therefore, the molarity of a solution that contains 35.00 g of CuSO4 dissolved in 250.0 mL of water is 0.88M.

Learn more about molarity at: https://brainly.com/question/12127540

The final temperature of the water is: T_final = 45.0°C

We can use the formula for the specific heat capacity of the water to solve this problem:

q = mcΔT

First, we can calculate the initial energy of the water:

q = mcΔT

q = (10.0 g) (4.184 J/g°C) (25.0°C)

q = 1,046 J

Next, we can calculate the final temperature after absorbing 840 J:

q = mcΔT

840 J = (10.0 g) (4.184 J/g°C) (ΔT)

ΔT = 20.0°C

Therefore, the final temperature of the water is:

T_final = T_initial + ΔT

T_final = 25.0°C + 20.0°C

T_final = 45.0°C

To know more about final temperature, here

brainly.com/question/11244611

#SPJ1

Answer:

D. Ultraviolet light should have a short wavelength, not a long wavelength.

Explanation:

just took the quiz on Ed

The mistake Gino made is, ultraviolet light should have a short wavelength, not a long wavelength.

Electromagnetic spectrum is the arrangement of electromagnetic radiations in the order of increasing frequency or decreasing wavelength.

Examples electromagnetic radiations based on increasing wavelength  include;

Thus, the mistake Gino made is, ultraviolet light should have a short wavelength, not a long wavelength.

Learn more about electromagnetic radiation here: https://brainly.com/question/25847009

Answer:

Combustion – substance reacts with oxygen often producing heat and light. Oxygen is ALWAYS one of the reactants. ... CH4 + 2O2 → CO2 + 2H2O Incomplete combustion – carbon monoxide and water.

Explanation:

Answer:

See explanation

Explanation:

PO4{3-} is phosphate
Sulfite's formula is SO3{2-}
Sulfate is SO4{2-}
OH- is hydroxide
Note: {x±} signifies the charge of the entire molecule

The polyatomic ions in question are phosphite ion, sulfite ion, and sulfate ion.

The formula PO3−4 represents the polyatomic ion called phosphite ion. It is composed of one phosphorus atom bonded to three oxygen atoms. The name of the sulfite ion is SO3−2, and it consists of one sulfur atom bonded to three oxygen atoms. Lastly, the sulfate ion has the formula SO4−2, and it is composed of one sulfur atom bonded to four oxygen atoms.

https://brainly.com/question/35456287

#SPJ6

Evaporation is the process of turning liquid into vapour/ gas state.

Answer:

EVAPORATION :

We know that particles of matter are always moving and are never at rest. At a given temperature in any gas, liquid or solid, there are particles with different amounts of kinetic energy. In the case of liquids, a small fraction of particles at the surface, having higher kinetic energy, is able to break away from the forces of attraction of other particles and gets converted into vapour. This phenomenon of change of a liquid into vapours at any temperature below its boiling point is called evaporation.

EVAPORATION CAN BE INCREASED BY :

● an increase of surface area:

● an increase of temperature:

● a decrease in humidity:

● an increase in wind speed:

Answer:

(D) - 16.6 kcal

Explanation:

Hello,

In this case, the Gibbs free energy for the given reaction is computed in terms of the Gibbs free energy of formation of each species involved in the chemical reaction:

\(\Delta _rG=2\Delta _fG_{NO_2}-2\Delta _fG_{NO}-\Delta _fG_{O_2}\)

Thus, it is found for nitrogen monoxide, oxygen and nitrogen dioxide the following Gibbs free energies of formation: 87.6, 0 and 51.3 kJ/mol respectively, therefore we compute:

\(\Delta _rG=2(51.3kJ/mol)-2(87.6kJ/mol)=-72.6kJ*\frac{1kcal}{4.184kJ} \\\\\Delta _rG=-17.35kcal\)

The closest result is (D) - 16.6 kcal, as such difference is noticed when different sources for thermochemical data are used, in this case, the NIST data were used.

Best regards.

Answer:

The sound waves travel from the outer ear and in through the auditory canal, causing the eardrum, or tympanic membrane, to vibrate. This, in turn, causes the three small bones, known as the ossicles, or the hammer, the anvil and the stirrup, in the middle ear to move.

Answer:

A

Explanation:

One way that energy is transferred as heat is through direct contact between objects. is the process that moves energy from one object to another when they are touching. The heat energy moves from one object to another.

Explanation:

As a liquid, water has more directions to move and to absorb the heat applied to it. There is more surface area that needs to be heated for the overall temperature to increase. However, with ice, the surface area doesn't change due to its more rigid structure

The splashing of water caused the volume of the block to reduce as compared to when the sides were measured.

First, let us calculate the volume of the block from the measured sides:

Volume of a rectangle = L x W x H

For the rectangle whose L = 3 cm, W = 1 cm, and H = 1 cm,

Volume = 3 x 1 x 1

               = 3.0 cm3

Also recall that an object will always displace its own volume when thrown into a liquid. Hence

Volume of the rectangular block = Final water level in the cylinder - initial water level

                      = 42.7 mL - 40.1 mL  

                         = 2.6 mL or 2.6 cm3

The volume of the block from direct measurement of its sides is 3.0 cm3 while the volume from the floatation method is 2.6 cm3.

Thus, the splashing of water has caused the volume of the block to reduce as compared to when the sides were measured.

The complete question is as below:

A student adds a rectangular block of mass 26.10 g to a graduated cylinder initially filled with 40.1 mL of water, but some water splashes out of the cylinder. As a result, the student reads the new level of the water to be 42.7 ml. Previously, the student had  measured the length, width and height of the block to be 3.0 cm by 1.0 cm by 1.0 cm.  Does the splash cause the volume of the block to be reported as too high or too low, compared to the volume calculated from the  length measurements?

More on volume calculation can be found here: https://brainly.com/question/4115259

Many island chains were formed as a result of blank volcanism is known as hotspot volcanism.

Hotspot volcanism occurs when a mantle plume, a column of hot and buoyant rock material rising from deep within the Earth's mantle, reaches the surface. These mantle plumes are stationary relative to the moving tectonic plates on the Earth's surface.

As the tectonic plate moves over the stationary hotspot, the mantle plume melts and produces magma. This magma rises through the Earth's crust, creating a volcanic eruption. Over time, repeated eruptions build up layers of lava and volcanic material, forming a cone-shaped volcano. As the tectonic plate continues to move, the volcano becomes inactive, and a new volcano forms above the stationary hotspot.

However, in the case of island chains, the tectonic plate movement carries the volcanoes away from the hotspot. As a result, a trail of extinct volcanoes is left behind, forming a linear chain of islands. Each island in the chain represents a period of volcanic activity at that specific location as the plate moved over the hotspot.

Hotspot volcanism and the formation of island chains provide valuable insights into the dynamics of Earth's mantle and plate tectonics. By studying the age progression of islands in a chain, scientists can gain a better understanding of the movement and speed of tectonic plates and the behavior of mantle plumes deep beneath the Earth's surface.

Know more about Hotspot volcanism here:

https://brainly.com/question/12703688

#SPJ8

Answer:

(A) getting study help, and retaking classes or exams

(A) applying for a loan

(C) getting study help, and retaking the exam

Explanation:

Answer: Fatty foods are a type of food works best to slow the speed at which alcohol is absorbed by the body.

Explanation: The slowly alcohol is metabolized by the body, fatty foods are better for this. The delaying factors are that heavy foods, including oil and non-vegetarian food, are intoxicating. The body takes significantly longer to digest and occupies the stomach longer.

Answer:

Rich in heart-healthy monounsaturated fats, avocados are one of the best foods you can eat before drinking alcohol.

Explanation:

That's because fat takes much longer to digest than protein or carbs, which can help slow the absorption of alcohol.

Answer:

positive

Explanation:

proton is a subatomic particle with a postive charge on it.

hope this helps!!! ☺️

Nuclear Fission

Nuclear fission, subdivision of a heavy atomic nucleus, such as that of uranium or plutonium, into two fragments of roughly equal mass. The process is accompanied by the release of a large amount of energy. In nuclear fission the nucleus of an atom breaks up into two lighter nuclei.

Nuclear fission is a process where the nucleus of an atom is split into two or more smaller nuclei, known as fission products. The fission of heavy elements is an exothermic reaction, and huge amounts of energy are released in the process.

Answer:

              24.97 g of C

Explanation:

Molar Mass of Ibuprofen is 206.29 g/mol

Molecular Formula of Ibuprofen is C₁₃H₁₈O₂

Also, 13 C atoms has mass of 12.01 × 13 = 156.13 g

Percentage of C in Ibuprofen,

% age of C = 156.13 / 206.29 × 100 = 75.68%

Now calculate 75.68 % of 33 g as,

75.68 % = x / 33 g × 100

x = 75.68 × 33 / 100

x = 24.97 g of C

The type of reaction that will occur if AH is negative and entropy increases is option  A which is a spontaneous reaction .

The spontaneity of any chemical reaction depends on the Gibbs free reaction which is related to entropy change and enthalpy change.ΔG= ΔH-TΔS

Where T is temperature change in kelvin.If AH is negative, entropy will increases which is ΔS. Then the ΔG will depend on the temperature change.

If TΔS is larger than ΔH, the reaction will be spontaneous and ΔG will be negative which means the reaction will move forward without any external input.

When a change in entropy increases with the temperature in the system, the reaction will be spontaneous and this will make the Gibbs free energy to be negative.

Learn more about spontaneous reaction below.

https://brainly.com/question/14061406

#SPJ1

If the efficiency of a machine increases, it means that the machine is able to convert a higher percentage of its input energy into useful work output.

This could happen due to various factors, such as reducing friction, improving the design of the machine, or using more efficient components. The machine requires less energy input to perform the same amount of work. This could result in cost savings, reduced energy consumption, and lower environmental impact.

The output of the machine increases while the input remains constant. This could result in increased productivity, faster production rates, and improved performance. The wear and tear on the machine may decrease, as it is working more efficiently and experiencing less stress. This could result in longer machine life and reduced maintenance costs. Increasing the efficiency of a machine can have many positive effects, including cost savings, improved performance, and reduced environmental impact.

The complete question is

If the efficiency of a machine increases, what happen?

To know more about the Machine, here

https://brainly.com/question/25143359

#SPJ4

A pair of molecules which exist in two forms that are mirror images of each other but cannot be superimposed one upon the other are called the enantiomers. They are present in pairs and have similar molecular shape.

The compounds with the same molecular formula but are non-superimposable non-mirror images are called diastereomers. They have distinct physical properties and molecular shape.

The constitutional isomers have the same molecular formula but have different bonding atomic organization and bonding patterns.

So here:

1st structure is constitutional isomers (c), 2nd structures are enantiomers (b) and the 3rd are completely different not isomers (d).

To know more about enantiomers, visit;

https://brainly.com/question/30401546

#SPJ1

There is no reason to run these solutes at the 20 MWCO because they are both much smaller than the MWCO of the membrane.

The MWCO (molecular weight cut off) is the molecular weight of a solute at which it will be retained by a membrane during a process such as ultrafiltration or dialysis. If a solute has a molecular weight higher than the MWCO of a membrane, it will be retained and not pass through the membrane. If the molecular weight of a solute is lower than the MWCO, it will pass through the membrane.

In this case, glucose has a molecular weight of 180 g/mol (6 carbons x 12 g/mol per carbon + 6 oxygens x 16 g/mol per oxygen) and albumin has a molecular weight of approximately 81,942 g/mol (607 amino acids x 135 g/mol per amino acid). Both of these solutes have molecular weights that are much lower than 20,000 g/mol, which is a typical MWCO for ultrafiltration or dialysis membranes.

They would both easily pass through the membrane and be lost during the process. Instead, a membrane with a much lower MWCO would be needed if we wanted to retain these solutes during a process such as ultrafiltration or dialysis.

Learn more about glucose here:

https://brainly.com/question/2396657

#SPJ1

Answer:

you need to state the options

Answer:

3.7 x 10^23

is the right answer

Answer:

CaH2O2

Explanation:

ez

The chemical formula for x and y is Cu₂O and CuO. The mass cooper which can react with 0.5g of oxygen to yield x and y is 2.745 g.

A chemical formula is a phrase that lists the constituent parts of a compound together with their relative quantities. No subscript is used if there is just one atom of a certain kind. A subscript is added to the symbol of an atom if it contains two or more of a certain type of atom.

1. 1.535 g of X → 1.365 g of Copper

1.535 – 1.365 = 0.170g of Oxygen

Atomic weight of Cu = 63.5,

Atomic weight of Oxygen = 16

For Cu 1.365 g / 63.5 = 0.02 mol

For Oxygen 0.170 g / 16 = 0.01 mol

X = Cu₂O

1.450 g of Y → 1.160 g of Cu

1.450 – 1.160 = 0.290 g of Oxygen

For Cu = 1.160 g / 63.5 = 0.018 mol

For Oxygen = 0.290 g / 16 = 0.018 mol

Y = CuO

2. The total mass of Oxygen = 0,170 g + 0,290 g

= 0.460 g

Total mass of Cu = 1.160 g + 1. 365 g

= 2.525 g

0.460 g of Oxygen → 2.525 g of Cu

0.500 g of Oxygen → (2.525 x 0.5) / 0.460

= 2.745 g of Cu

Thus, The law of multiple proportions was formulated by John Dalton in 1804.

To learn more about the chemical formula, follow the link;

https://brainly.com/question/29031056

#SPJ9

Due to the trend of boiling points, the optimal order for elements within a group going from top to bottom is \(A, X_o, Z_w\).

From the given information we can see that the boiling points of the elements decrease from A to Xo to Zw. The highest boiling point (350°C) is of element A, followed by Xo (215°C) and Zw (285°C). We arrange the components in decreasing order of boiling points to get A, Xo and Zw.

It is important to remember that in this situation, the alphabetical order of the elements and their atomic weights are irrelevant considerations. A reasonable basis for arranging the components within the system is provided by the trend in boiling points.

Learn more about boiling points, here:

https://brainly.com/question/1416592

#SPJ1

Solution :

We know that :

\($\Delta T_f = k_f.m$\)  and   \($m=\frac{w_2}{m_2 \times w_1}$\)

Then, \($\Delta T_f = k_f.\frac{w_2}{m_2.w_1}$\)   ..................(1)

Where,

\(w_1\) = amount of solvent (in kg)

\(w_2\) = amount of solute (in kg)

\(m_2\) = molar mass of solute (g/mole)

\(m\) = molality of solution (mole/kg)

Given :

\(\Delta T_f\) = \(3.14\ ^\circ C\),   \(k_f= 5.12\ ^\circ C/m\)

                              \(=5.12 \ ^\circ C/mole/kg\)

                              \(=5.12 \ ^\circ C \ kg/mole\)

\(w_1\) = 0.250 kg,  \(w_2\) = 24.3 g

Then putting this values in the equation is (1),

\($3.14 = \frac{5.12 \times 24.3}{m_2 \times 0.250}$\)

\($m_2 = \frac{5.12 \times 24.3}{3.14 \times 0.250}$\)

\(m_2= 158.49\)  g/mole

So, the molar mass of the unknown compound is 158.49 g/mole.

A physical property of a pure substance is anything that can we can observe without changing its identity.

Density:

The density is property of matter which expresses  a relationship of mass to volume.

Melting:

The melting pint is the physical property because we can determine the melting point of a substance without changing its chemical composition.

Boiling:

As the liquid matter is heated further it eventually boils or vaporizes into a gas at the boiling point.

Conductivity:

Conductivity is the physical property  because the identity of the substance does not change.

So we can conclude that a physical property of a pure substance is anything that can we can observe without changing its identity.

Learn more about Conductivity here: https://brainly.com/question/24943129

#SPJ1