Mrs. Vikram's science class notices that a high
pressure system bringing cold air is set to move
into their city. Currently, the weather is warm. As
the cold air enters their region, what will most
likely occur?

Answer:

The determination of a melting point of a sample is a standard laboratory procedure and is relatively straight forward. It is used to identify a sample, establish its purity and determine the thermal stability of the sample.

Benzene is produced by the distillation of crude oil, being one of the by-products formed in this process, or even by synthesis, based on smaller hydrocarbons.

Reaction 1 - Electrophilic Addition of Halide (HX) to Alkenes

Reaction 2 - Radical addition of hydrogen bromide (HBr) to alkenes

Benzene is a compound compound as an aromatic hydrocarbon. It is widely used as a raw material in raw materials, in materials, in airlines and in petrochemical processes used for petrochemical raw materials side for petroleum.

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Answer:

A boiled egg shows a increase in entropy

Explanation:

Denaturation of protein leads to increase in entropy.

Answer:

Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...

Physical state of the reactants and surface area. ...

Temperature. ...

Presence of a catalyst.

Answer:

Gallium is the correct answer. Gallium melts at a few degrees higher than room temperature, which is 298K.

The mass of zinc required to react with HNO3 is 3.45 g

The moles of HNO3 reacting is calculated using the formula below:

volume = 0.850

volume = 125.0 mL = 0.125 L

Moles of HNO3 = 0.850 × 0.125 = 0.10625 moles

Equation of reaction:

Zn + 2 HNO3 --> Zn(NO3)2 + H2

2 moles of HNO3 reacts with 1 mole of Zn.

moles of zinc reacting = 0.10625/2 = 0.053125

Mass of zinc = moles × molar mass

molar mass of Zn = 65

Mass of zinc = 0.053125 × 65

mass of Zn = 3.45 g

Therefore, the mass of zinc will completely react with 125.0 mL of a solution of nitric acid (HNO3) which has concentration of 0.850M is 3.45 g

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Answer:

number of molecules and the number of moles

Explanation:

Its always same for molcols

The relationship between number of molecules and the number of moles  is more consistent as the moles and molecules are related by Avogadro's number.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number

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Answer:

The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes – the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation. The other types of EM radiation that make up the electromagnetic spectrum are microwaves, infrared light, ultraviolet light, X-rays and gamma-rays

Explanation:

Answer:

Scale

Explanation:

Answer:

a seesaw because when limiting factors go down, the carrying capacity goes up

Explanation:

A limiting factor is the scarcest resource that limits the growth of a population, so, when limiting factors go down, that growth is no longer limited.

Answer:

Sheet Metal Door:63

Explanation:

Answer:

How do electrons enter the electron transport chain?

All of the electrons that enter the transport chain come from NADH and FADH 2​start subscript, 2, end subscript molecules produced during earlier stages of cellular respiration: glycolysis, pyruvate oxidation, and the citric acid cycle.

Explanation:

i hope it helped u :)

The equilibrium constant of the second reaction is 0.155.

The equilibrium constant is a numerical value that shows the extent to which reactants are converted into products at a given temperature.

Now, we have the reaction; 3Z + Q ⇄ 2 X  and  4 X ⇄ 6 Z + 2 Q.

In the first reaction;

K =[ X]^2/[Z]^3 Q

In the second reaction;

[Z]^6 [Q]^2/[X]^4

Let [ X]^2 = A

[Z]^3 Q = B

Then the second reaction can be;

K = (B)^2/(A)^2 = (B/A)^2

The equilibrium constant of the second reaction therefore is; (1/2.54)^2

K = 0.155

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~Shoto Todoroki here~

Remember that for neutral atoms, the number of electrons must equal the atomic number. Adding up all the electrons from the given configuration will give

This means that the atom you're looking for has an atomic mass of 23, which corresponds to the atomic mass of Vanadium, a transition metal located in the fourth row, group 5 of the periodic table.

Vanadium's noble gas shorthand notation is

V:[Ar]4s23d3

hope this helps :))

Answer:

Lithium = 2

Sulphur = 1

Oxygen = 4

Total = 7

im thinking 266.25g round up to 266.3 i hope i got it right :)

Explanation:

from positive to negative terminal

There will be a flow of current from the battery through the wires to the bulbs.

The term circuit speaks of a path that is designed for the flow of current. We know that current often flows from the battery to other circuit components.

It then follows that in the circuit as shown, there will be a flow of current from the battery through the wires to the bulbs.

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No. It will not be possible to precipitate all lead ions from a solution by precipitating them with chloride.

When a chloride salt is used to precipitate lead ions from a solution, an insoluble lead chloride salt would be formed

Pb2+ + Cl- ---> PbCl2

However, the formation of PbCl2 in an aqueous medium leads to the establishment of equilibrium between dissolved ions and undissolved solids.

PbCl2 (aq) <------> Pb2+ + Cl-

Thus, it will not be possible to completely remove all the lead ions from the solution.

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have set up a lab investigation to illustrate the stages of the water cycle. You are using a heat lamp with three different heat settings to represent the sun and the ener

Which stage of the water cycle is affected MOST by the highest setting on the heat lamp?

A

collection

B

condensation

С

evaporation

D

precipitation

Photosyntheis is a biochemical reaction that combines chemicals with biological species to produce energy. Atoms of hydrogen bond with carbon to form glucose.

Carbon dioxide and hydrogen are the reactants that are used from the environment by the plants to make energy. Glucose and oxygen are the products.

The hydrogen atoms from the environment are absorbed by the plants and are combined with the carbon dioxide to yield glucose or sugar molecules for energy.

Therefore, option B. hydrogen and carbon dioxide react to produce glucose.

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Answer:

Convert 6.50 g N to g urea.

6.50 g N x (molar mass urea/2*atomic mass N) = ? g urea.

Explanation:

Answer:

Does water move in or out of a hypotonic solution?

In a hypertonic solution, the net movement of water will be out of the body and into the solution. ... In hypotonic solutions, there is a net movement of water from the solution into the body. A cell placed into a hypotonic solution will swell and expand until it eventually burst through a process known as cytolysis.

Explanation:

If a cell is placed in a hypertonic solution, water will leave the cell, and the cell will shrink. In an isotonic environment, there is no net water movement, so there is no change in the size of the cell. When a cell is placed in a hypotonic environment, water will enter the cell, and the cell will swell.

Answer:

edge sample answer -

Lesson Question: What is the effect of temperature on the solubility of a solid in a liquid?

Explanation:

Answer:

Under high temperatures and low pressure, gases behave the most ideal.

Explanation:

Low pressure reduces the effect of the finite size of real particles by increasing the volume around each particle, and a high temperature gives enough kinetic energy to the particles to better overcome the attractions that exist between real particles. (Prevents sticking.)

In summary, real gases behave more like ideal gases when they are far away from a phase boundary, (condensation or freezing).

The concentration of NO2 is 0.054 M and that of N2O4 is 0.003 M.

The equilibrium constant shows the extent to which reactants are converted into products.

We have the reaction;  N2O4⇌2NO2 and Kp = 4.5. Setting up the ICE table, we have;

       N2O4       ⇌     2NO2

I       0. 0550               0

C       -x                        +x

E    0. 0550 - x            x

Given that;

Kp = [NO2]^2/[N2O4]

4.5= (x)^2/0. 0550 - x

4.5(0. 0550 - x) = x^2

0.2475 - 4.5x = x^2

x^2 +  4.5x -  0.2475 = 0

x=0.054 M

The concentration of the required NO2 gas at equilibrium is 0.054 M and that of N2O4 is 0.003 M.

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Answer:

A precipitation reaction produces an insoluble solid as a result of the reaction of two dissolved chemicals in a solution. The insoluble solid, called a precipitate, sinks to the bottom of the solution or stays in suspension as cloudy particles.

Explanation: ur welcom

Answer:

86.96

Explanation:

Based on factors affecting solution formation;

A solution is a substance formed when a substance known as solute dissolves in another substance know as solvent.

Factors that affect solution formation include:

Strong solvent-solute intermolecular forces favors solution formation.

Increase in entropy favours solution formation

Decrease in enthalpy favours solution formation.

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