Which type of cloud can sometimes be found in a layer other than the troposphere

The translation of the question is

250 g of alcohol have been put in a glass together with 2 g of iodine, which dissolve completely. Calculate the concentration of the solution in% by mass?

Answer:

The %mass by mass of the given solution is 0.794%

Explanation:

We are given

Mass of solute(Iodine) = 2g

Mass of the solvent (Alcohol) = 250g

Since the Iodine dissolves completely in Alcohol

Total mass of the solution = 250 + 2 = 252g

the formula of concentration of the solution in  % by  Mass is given by

%[tex]\frac{w}{W} = \frac{Mass of the solute*100}{Total mass of the solution}[/tex]

%w/W = [tex]\frac{2*100}{252}[/tex]

          = 0.794%

Therefore the %mass by mass of the given solution is 0.794%

Answer:

chemical energy

Explanation:

Answer:

The alteration of the rate of the chemical reaction by the addition of a catalyst will change the dimension of L

Explanation:

The parts of the Energy profile of a reaction diagram the given letters represent are;

K = The energy possessed by the reactants

L = Activation energy required for the reaction to take place

M = Energy threshold required for the reaction to take place

N = The change in the enthalpy from the reactants to the products, which is also the energy released

O = The energy possessed by the products

The addition of a catalyst changes the route with which the reaction takes place such that the reaction rate is increased because the activation energy, L, is reduced.

Therefore, the dimension that will be changed if the rate of reaction were to be altered by a catalyst is L.

In container E, the pressure will be higher than container D

Given

Container with :

Required

The higher pressure container

Boyle's Law  stated that :

At a constant temperature, the gas volume is inversely proportional to the pressure applied  

[tex]\rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}[/tex]

From the diagram (picture), it shows that the volume of container D is greater than container E, so the pressure applied to container D will be less than the pressure applied to container E

Answer:

i don't knoblol

Explanation:

i don't know lol

Answer:

a compound of high molecular weight derived either by the addition of many smaller molecules, as polyethylene, or by the condensation of many smaller molecules with the elimination of water, alcohol, or the like, as nylon. a compound formed from two or more polymeric compounds.

Explanation:

HOPE IT HELPS YOU:))

Answer:

0.22moles

Explanation:

Given parameters:

Volume of gas = 4.92L

Unknown:

Number of moles  = ?

Condition = STP

Solution

At STP, the number of moles of a given gas is expressed as;

     Number of moles  = [tex]\frac{volume given}{22.4}[/tex]  

 Number of moles  = [tex]\frac{4.92}{22.4}[/tex]   = 0.22moles

If there are 5 protons, there should be 5 electrons as well. Boron as an electron configuration of 2-3 or 1s2 2s2 2p.

The term proton is defined as a subatomic particle found in the nucleus of every atom. Its mass is slightly less than that of a neutron and 1,836 times the mass of an electron.

The protons are considered as elementary particles. The protons are called to be composite particles, containing three valence quarks, and together with neutrons are now classified as hadrons.

Boron has an atomic number of 5. In which it has 5 protons. Therefore, the atom also has 5 electrons. Its atomic mass is 10.811. Thus, it has 11 total particles in its nucleus i.e., protons and neutrons.

Thus,If there are 5 protons, there should be 5 electrons as well. Boron as an electron configuration of 2-3 or 1s2 2s2 2p.

To learn more about the proton, follow the link;

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Answer:

The answer is: Atomic radii decreases from left to right across a period and increases from top to bottom in a group.

Explanation:

Answer:

Hydrogen gas (H2) is a molecule, but not a compound because it is made of only one element. Water (H2O) can be called a molecule or a compound because it is made of hydrogen (H) and oxygen (O) atoms.

Explanation:

Hope this helped!!!

-BB

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Answer:

It's an element. :)

Explanation:

Answer:

C based on the number 5, which is easy to use  in calculations

Explanation:

The SI unit system is not based on the number 5.

Answer:

that is a false sentence

Answer:

I'm sure you've already finished the est but the real answer is true, I took the k12 test and got that one correct, hope this helps anyone!

Explanation:

Answer:

becomes negatively charged

Explanation:

this is because when an object receives electrons it becomes negatively charged and the object that loses electrons becomes positively charged.

Answer:

First one because by adding more electrons it makes something more negative. So it becomes negatively charged

Answer:

2.11 * 10^3 molecules of phosphoric acid

Explanation:

Answer:

Mass = 26.58 g

Explanation:

Given data:

Mass of lithium nitride = 12.87 g

Mass of lithium hydroxide produces = ?

Solution:

Chemical equation:

Li₃N + 3H₂O     →    3LiOH + NH₃

Number of moles of of Li₃N:

Number of moles = mass/molar mass

Number of moles = 12.87 g/ 34.83 /mol

Number of moles = 0.37 mol

now we will compare the moles of lithium nitride  with lithium hydroxide.

                  Li₃N            :            LiOH

                     1                :             3

                 0.37              :           3/1×0.37 = 1.11 mol

Mass of LiOH:

Mass = number of moles × molar mass

Mass = 1.11 mol × 23.95 g/mol

Mass = 26.58 g

Answer:

a liquid with weak intermolecular forces and a high temperature

Explanation:

According to encyclopedia Britannica, "Vapour pressure is a measure of the tendency of a material to change into the gaseous or vapour state, and it increases with temperature. The temperature at which the vapour pressure at the surface of a liquid becomes equal to the pressure exerted by the surroundings is called the boiling point of the liquid."

This implies that the vapour pressure of a liquid tends to increase as the temperature of the liquid increases. Recall that vapour pressure also depends on the magnitude of intermolecular forces. The greater the magnitude of intermolecular forces, the lower the vapour pressure hence water has very much higher vapour pressure than ethane.

Answer:

A liquid with weak  intermolecular forces and a high temperature

Explanation:

I just took the test and got it right

Answer:

...............

Answer: 1 gallon

Explanation:

Answer:

1 gallon

Explanation:

because gallons are constisting of cups and 1 cup wont be enough for a fish to swim

Explanation:

C2H5OH is ethanol, which is a compound.

Answer:

Explanation:Once energy is added to water by heat from the sun, the bonds between the water molecules gain kinetic energy or energy in motion. Then they escape the surface of the liquid and become a gas (water vapor), which rises into atmosphere.

Answer:

clouds?

Explanation:

im sorry i just wanted the 23 points

Answer: The moles of nitrogen dioxide produced are 96.3

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar volume}}=\frac{3714L}{22.4L}=165.8moles[/tex]

[tex]4NH_3(g)+7O_2(g)\rightarrow 4NO_2(g)+6H_2O(g)[/tex]

According to stoichiometry:

7 moles of oxygen [tex](O_2)[/tex] produce = 4 moles of nitrogen dioxide [tex](NO_2)[/tex]

Thus 168.5 moles of oxygen [tex](O_2)[/tex] will produce = [tex]\frac{4}{7}\times 168.5=96.3[/tex] moles of nitrogen dioxide [tex](NO_2)[/tex]

Answer:

B) 1.6 g

Explanation:

**********************************************

Explanation:

Hydrochloric acid is HCl.

Hydrogen is H2.

Mole ratio is the numbers infront of them, which is 6 : 3.

Answer:Hydrochloric acid is HCl.

Hydrogen is H2.

Explanation:

Answer:

B 100 cm3

Explanation:

The balanced equation is given as;

2H2(g)+ O2(g) --> 2H2O(g)

From the reaction stochiometry, 2 cm3 of H2 would react with 1 cm3 of O2 to form 2 cm3 of H2O

Before Reaction --> 100cm3 of H2,   25cm3 of O2,  0cm3 of H2O

During Reaction --> 50cm3 of H2,    25cm3 of O2,   50cm3 of H2O

(Oxygen is sed uup in the reaction)

After Reaction   --> 50cm3 of H2,    0cm3 of O2,     50cm3 of H2O

Total volume left = Unreacted H2 (50cm3)  +  50cm3 of H2O formed

Total Volume left = 50  + 50  =  100cm3

The total volume of gas present at the end of the reaction is 100 cm³

a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.

The balanced equation is given as;

2H₂(g)+ O₂(g) → 2H₂O(g)

From the reaction stoichiometry, 2 moles of H₂ would react with 1 mole of O₂ to form 2 moles of H₂O

Before Reaction:  100cm³ of H₂,   25cm³ of O₂,  0cm³ of H₂O

During Reaction:  50cm³ of H₂,    25cm³ of O₂,   50cm³ of H₂O

(Oxygen is used up in the reaction)

After Reaction:  50cm³ of H₂,    0cm³ of O₂,     50cm³ of H₂O

Total volume left = Unreacted H₂ (50cm³)  +  50cm³ of H₂O formed

Total Volume left = 50  + 50  =  100cm³

Hence, The total volume of gas present at the end of the reaction is 100 cm³

To learn more about chemical reactions, click here:

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