HELPPPPPPPP i need help!!!!!!!!!!!!!

300 g of LiClO₄ produce 5.64 moles of O₂, which is equivalent to 136 L of O₂ at 101.5 kPa and 21 °C.

Let's consider the following balanced equation.

LiClO₄(s) ⇒ 2 O₂(g) + LiCl(s)

We can calculate the moles of O₂ produced from 300 g of LiClO₄ using the following relationships.

[tex]300 g LiClO_4 \times \frac{1molLiClO_4}{106.39gLiClO_4} \times \frac{2molO_2}{1molLiClO_4} = 5.64molO_2[/tex]

Then, we will convert 101.5 kPa to atm using the conversion factor 1 atm = 101.325 kPa.

[tex]101.5 kPa \times \frac{1 atm}{101.325kPa} = 1.002atm[/tex]

Next, we will convert 21 °C to Kelvin using the following expression.

[tex]K = \° C + 273.15 = 21\° C + 273.15 = 294 K[/tex]

Finally, we will calculate the volume occupied by 5.64 moles of oxygen using the ideal gas equation.

[tex]P \times V = n \times R \times T\\\\V = \frac{n \times R \times T}{P} = \frac{5.64 mol \times (\frac{0.082atm.L}{mol.K} ) \times 294K}{1.002atm} = 136 L[/tex]

300 g of LiClO₄ produce 5.64 moles of O₂, which is equivalent to 136 L of O₂ at 101.5 kPa and 21 °C.

Learn more: https://brainly.com/question/18518493

Taking into account the definition of dilution,  the new concentration of the solution is 0.2567 M.

First of all, you have to know that   dilution is the reduction in concentration of a chemical in a solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volumeof the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In this case, you know:

Replacing in the definition of dilution:

0.385 M× 0.600 L= Cf× 0.900 L

Solving:

Cf= (0.385 M× 0.600 L)÷ 0.900 L

Cf= 0.2567 M

In summary, the new concentration of the solution is 0.2567 M.

Learn more about dilution:

Answer:

Soils Y

Explanation:

• The soils with lower pH are acidic so they react readily with powdered.

[tex].[/tex]

Answer:

SOIL Y

the soil with lower ph are acidic

Answer:

A. The neutrons and electrons are in the wrong place.

Explanation:

The atom's nucleus contains both protons and neutrons, whilst the electrons are arranged in shells around the nucleus.

Answer:

0.179254 kilocalories

Explanation:

divide the energy value by 4184

[tex]0.179254[/tex] that would be your answer

Answer:

*result with sodium hydroxide: white ppt of Zn(OH)2

*excess sodium hydroxide: Precipitate dissolves to form a COLOURLESS solution

*Result with Aqueous ammonia: White ppt of Zn(OH)2

*excess aqueous ammonia: Precipitate dissolves to form a COLOURLESS solution

When 100 photons of light pass through a sample and 64 photons are detected after the passage of light, the number of photons transmitted through the sample is 64.

This is based on the methods of calculating the absorbance of light, which is depicted as the higher the amount of light transmission, the lower the amount of light absorbed.

Thus, when 64 photons of light in 100 photons are detected, 64 photons are transmitted, and therefore, the number of photons absorbed is 36.

Hence, hypothetically, if 100 photons of light are transmitted, 0 photons of light will be absorbed.

Therefore, in this case, it is concluded that the correct answer is 64 photos.

Learn more here: https://brainly.com/question/20678715

At before Duberinor,Mendeleev tried to use atomic weight but they failed .

Answer:

The answer is letter C

Answer:

The change in energy for a chemical reaction has to do with the potential energy of the electrons. The change in energy for a nuclear reaction has to do with the potential energy of the nucleus. The change in energy for a nuclear change is many orders of magnitude larger than for a chemical change.

The statement that describes both nuclear and chemical changes occur is "potential energy."

Nuclear reactions include a change in the nucleus of an atom, which usually results in the production of a different element. Chemical reactions, on the other hand, require just electron rearrangement and no changes in nuclei.

A nuclear reaction is any reaction that causes the nucleus of an atom to change. An atom's nucleus is made up of protons and neutrons. It seems to reason that a nuclear reaction alters the amount of protons and/or neutrons in an atom.

Chemical changes occur when bonds between molecules or atoms are broken and/or formed to form a new material. In this case, the new substances' qualities differ from the old, the particles differ, and the number of particles can alter.

The change in energy for a nuclear change is many orders of magnitude greater than the change in energy for a chemical change.

Learn more about nuclear and chemical change here

https://brainly.com/question/1979262

#SPJ2

Answer:

the magma comes from the mantle

Answer:

H2S

Explanation:

the oxidation number of S is -2.

Hydrochloric acid can cause damage if it comes into contact with your lungs, eyes, stomach, or skin. If hydrochloric acid comes into contact with your skin, it can cause: chemical burns. scarring.

Answer:

Volume

Explanation:

Volume is how much of a substance something can hold!

Hope this helped, have a nice day! :)

The word that completes the sentence is "volume."The volume of a bottle refers to how much liquid it can hold, typically measured in liters or milliliters.

Knowing the volume of a bottle is important when you need to measure out or store a certain amount of liquid. Different types of bottles have different capacities, so it's important to check the label or specifications to determine the right size for your needs.

Volume is a measure of three-dimensional space. It is often quantified numerically using SI derived units or by various imperial or US customary units (such as the gallon, quart, cubic inch). The definition of length (cubed) is interrelated with volume. The volume of a container is generally understood to be the capacity of the container; i.e., the amount of fluid (gas or liquid) that the container could hold, rather than the amount of space the container itself displaces.

Thus, the word that completes the sentence is "volume."

Learn more about volume,here:

https://brainly.com/question/28058531

#SPJ3

Answer:

The Lewis structure for XeF4 has a total of 36 valence electrons. When we are done adding valence electrons we check each atom to see if it has an octet (full outer shell). We also need to check to make sure we only used the number of available valence electrons we calculated earlier (no more, no less).

Explanation:

Answer:

I would say baking powder maybe or you should try tap water

Answer:

1st one - tap water (ill go over them one by one to help you understand why)

Its honestly rather vinegar or tap water but if I would go with tap water however I could be wrong. I don't take your class lol

Step by step:

First, tap water includes a lot of ions and contaminants. As a result, tap water only contains ions capable of conducting electricity. As a result, tap water is an excellent electrical conductor.

2nd) Ammonia and baking soda are both weak bases. When weak electrolytes dissolve in water, the resulting solution has a low conductivity.

Third, because it releases H+ and CH3COO- ions, the mobility of these ions in the solution assists in electrical conduction. As a result, vinegar is a good electrical conductor.

4th) When dissolved in water, soda compounds (chemicals mostly containing sodium) include ions, and ions assist conduct electricity. As a result, it does not conduct because it lacks ions or charged particles.

The equilibrium constant shows the extent of dissolution of a substance in solution. The molar solubility of the compound here is 1.2 * 10^-8 M.

The solubility product is the equilibrium constant that shows the extent to which a substnace is dissolved in soution.

Now let us set up the ICE table as shown;

               Cr(OH)3 (s) <-> Cr^3+ (aq) + 3OH^- (aq)

I                                           0                 0

C                                          +x               +3x

E                                          x                   3x

Ksp = [Cr^3+] [OH^- ]^3

6.3x10^-31 = [x] [3x]^3

6.3x10^-31 = 27x^4

x = 4√6.3x10^-31 /27

x = 1.2 * 10^-8 M

Lear n more about solubility product: https://brainly.com/question/857770

Answer:

A. Predicting data that fall beyond a known data point

Explanation:

Extrapolating is unreliable because you are predicting data outside of the data range - anything could happen for the data to stop following the trend or pattern

Answer:

A compound is a pure substance.

Answer:

1.92402 kilohertz

Explanation:

hope this helps

Answer:

• From wave equation :

[tex]{ \rm{v = f \lambda}}[/tex]

[tex]{ \rm{3.0 \times {10}^{8} = (1.89 \times {10}^{18}) \times \lambda}} \\ \\ { \rm{ \lambda = \frac{3.0 \times {10}^{8} }{1.89 \times {10}^{18} } }} \\ \\ { \boxed{ \rm{ \: \lambda = 1.587 \times {10}^{ - 10} \: }}}[/tex]

Answer:

C is the correct option.

Explanation:

When water reaches 100°C it starts evaporating and the molecules of water turns to vapor.

Aria speed during scuba diving was 0.15 m/s.

Speed is the ratio of the distance travelled to the time taken. Speed is given by:

Speed = distance / time

Given that the distance travelled was 36 meters and the time was 4 minutes, hence:

Time = 4 minutes × 60 seconds per minute = 240 seconds

Speed = 36 m / 240 s

Speed = 0.15 m/s

Therefore Aria speed during scuba diving was 0.15 m/s.

Find out more at: https://brainly.com/question/22610586

Answer:

c

Explanation:

c .

answer

your

this

questions

Answer:

B

Explanation:

If AH and AS are both negative  will a low temperature make a reaction spontaneous.

A spontaneous reaction is a reaction that favors the formation of products at the conditions under which the reaction is occurring. A roaring bonfire (see figure below) is an example of a spontaneous reaction.

A fire is exothermic, which means a decrease in the energy of the system as energy is released to the surroundings as heat.

The products of a fire are composed mostly of gases such as carbon dioxide and water vapor, so the entropy of the system increases during most combustion reactions.

Therefore,  If AH and AS are both negative  will a low temperature make a reaction spontaneous.

To learn more about Spontaneous reaction, refer to the link:

https://brainly.com/question/13790391

#SPJ2