Step 5: Measuring the Volume of Air Near 20°C (Room Temperature) temperature of gas height of the column of gas

1. Temp of gas: 3C Height of the column of gas: 6.2cm
2. Temp of gas: 294K Volume of gas: 0.78cm3

Answer:

Well why didn't you do it? Have a great day and I am so sorry for wasting your points I don't need them. I hope someone helps!! ;)

Explanation:

Answer:

Answer:

4.921.

Explanation:

It is an acidic buffer solution;

∵ pH = pKa + log[salt]/[acid].

∴ pH = - log(1,8 x 10⁻⁵) + log[0.75/0.50] = 4.745 + 0.1761 = 4.921.

Explanation:

The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14.  pH is a unitless quantity. Therefore,  the pH of a solution that was 0.75 M acetic acid is 4.921.

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7.

pH of acetic acid= pKa + log[salt]/[acid]

pH of acetic acid = - log(1,8 x 10⁻⁵) + log[0.75/0.50]

      = 4.745 + 0.1761

      = 4.921

Therefore,  the pH of a solution that was 0.75 M acetic acid is 4.921.

To learn more about pH, here:

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Answer:

[tex]C_4H_5[/tex]

Explanation:

Hello!

In this case, since the combustion analysis provides us the yielded mass of both water and carbon dioxide, as the sources of hydrogen and carbon in the hydrocarbon, we are able to compute the moles of each via the following mole-mass relationships:

[tex]n_H=1.36gH_2O*\frac{1molH_2O}{18.02gH_2O}*\frac{2molH}{1molH_2O}=0.151molH\\\\n_C=5.22gCO_2*\frac{1molCO_2}{44.01gCO_2}*\frac{1molC}{1molCO_2}=0.119molC[/tex]

Now, we divide those moles by the fewest ones (those of carbon) in order to compute their subscripts in the empirical formula:

[tex]C: \frac{0.119}{0.119} = 1 \\\\H:\frac{0.151}{0.119} = 1.27[/tex]

However we need whole numbers, that is why we multiply each subscript by 4 to get 4 for carbon and 5.08 ≅ 5 for hydrogen:

[tex]C_4H_5[/tex]

Best regards!

Answer: The prediction that human population is likely to increase may result in severe problems like global warming, extinction of animals due to human activities, et cetera.

Explanation:

The human population needs resources to survive, they use the resources in such a way that it is being exploited, the trees will be cut in such a large numbers that it will affect the animals depending them.

The human population also uses fossil fuels, burning of which releases harmful gases in the environment.

The usage of technology also comes with the curse of global warming because of release of green house gases such as chlorofluorocarbon.

With an increase in human population, there can be seen many harmful effects on environment.

Answer:

whatttttttttyu[poiuytrtyuiopoiuygtfdfghjkjhgfdfghjk

Explanation:

Answer: [tex]^{218}_{84}Po \rightarrow ^{218}_{85}At + ^{0}_{-1}e[/tex] is the correct equation for beta decay.

Explanation:

When a beta particle, that is, [tex]^{0}_{-1}e[/tex] is emitted in a radioactive decay then it is known as beta decay.

Therefore, beta decay of Polonium-218 is as follows.

[tex]^{218}_{84}Po \rightarrow ^{218}_{85}At + ^{0}_{-1}e[/tex]

Therefore, we can conclude that [tex]^{218}_{84}Po \rightarrow ^{218}_{85}At + ^{0}_{-1}e[/tex] is the correct equation for the given beta decay.  

Answer:

A

Explanation:

The top dudes answer summed up.

Answer:

It appears to be

Explanation:

I did that question.

Answer:

No, the two substances will not react with each other

Explanation:

We already know that argon belongs to group 18 in the periodic table. Members of this group are commonly referred to as noble gases. So, we can say that argon is a noble gas.

One characteristic of noble gases is that they possess a filled outermost shell, they have a complete octet of electrons. As a result of this, they hardly  participate in chemical reactions since they have already attained the stability that arises from having a complete octet of electrons.

Hence, argon will not react with hydrogen.

Answer:

Speed

Explanation:

On a distance - time graph, the slope of the line indicates the speed of the object.

Speed is the rate of change of distance with time.

  Speed  = [tex]\frac{distance}{time}[/tex]  

Now, the slope is the change in distance with the change time which is commensurate with the speed equation.

For a displacement - time graph, the slope is the velocity.

 Therefore the slope of a distance - time graph is its speed.

Answer:

D. bonds holding together two atoms of the same kind of metal.

Explanation:

Metallic bonds are very special kinds of interatomic forces that holds metals together and confers such unique properties on them.

The formation of this bond type is favored by large atomic radius, low ionization energy and a large number of electrons in the valence shell.

Answer:

i dont see the model bro

Explanation:

Answer:

The current model of the atom shows an atom that is mostly empty space. In the center is a small nucleus made of protons and neutrons.

Explanation:

Answer:

This is just what I think Im sorry if it's wrong

Explanation:

The outer planets are relatively closer to the sun and have a longer year than the inner planets.

Mercury, Earth, asteroid belt, Saturn, Neptune

Earth is an inner planet with a solid rock surface composition, while Jupiter is an outer planet with a gas surface composition.

Answer: They're called Periods

periods of the periodic table

Answer: Water

Explanation:

Answer:

List of Pros of Cloning

They could have a positive impact on the environment. ...

They would help us understand them better. ...

They can help us protect species that are close to extinction. ...

It makes us feel better for driving most of these species into extinction. ...

List of Cons of Cloning

We will be bringing back a species into an environment totally different from the one they lived in.

It puts the conservation of currently endangered species way back.

Answer:

2Li(OH)-->Li2O+H20

Explanation:

There are 2Li, 2H and 2O on each side

Answer:

B. Impulse

Explanation:

A= she is not resisting buying the car

B= She bought the car right away(impulse)

C = She did not plan ahead on what car she would buy

D= Not reasonable

Answer:

Cells are the basic building blocks of living things.

Explanation:

So the answer is cells because it  is composed of trillions of cells, all with their own specialised function. Cells are the basic structures of all living organisms.

I hope this helps you pass and humble yourself you will get to it, you got this!!!

Answer:

Cells are the most basic building blocks

Explanation:

Tissues are made out of cells. Organs are made out of tissues.

two

Explanation:

When two or more objects come in contact with each other this is called contact force

Answer:

4500 cent

Explanation:

From the question, we were told that

a fence 80 meters long requires 30 nails per meter.

1 metre fence = 30 nails

Then 80 meters long= ( 30 × 80)

= 2400 nails

Which means a fence 80 meters long will require 2400 nails in total.

We need to find the cost in dollars for the nails to build a fence 80 meters long.

We know that 40 nails per box will cost 75 cents per box.

(2400 nails/40 nail per box)= 60 box

Then 60 box will be needed to complete the fence.

the cost in dollars for the nails to build a fence 80 meters long= (60 box × 75 cent per box)=4500 cent

Answer:

There's only one electron in hydrogen.

Answer:

Hydrogen contain 1 electron

Explanation:

Answer:

8.25 moles of oxygen will be produced.

Explanation:

Given a balanced chemical equation;

2Al₂O₃ ------> 4Al + 3O₂

from the balanced chemical equation above, 3 moles of Oxygen are produced when 4 moles of Aluminum are produced.

4 moles of Al --------> 3 moles of Oxygen

11 moles of Al --------> ?

[tex]= \frac{(3 \ moles \ of \ O_2) \ \times \ (11 \ moles \ of \ Al)}{4 \ moles \ of \ Al} = 8.25 \ moles \ of \ O_2 \\\\[/tex]

Therefore, 8.25 moles of oxygen will be produced.

Answer: electrons

Explanation:

During oxidation and reduction, both of which are redox reactions, electrons are transferred.

Answer:

272.31× 10²³ atom of strontium

Explanation:

Given data:

Number of moles of strontium = 45.22 mol

Number of atoms = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.  The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

45.22 mol × 6.022 × 10²³ atom / 1 mol

272.31× 10²³ atom

Answer:

1 Once proteins, fats and carbohydrates are digested, absorption takes place in the small intestine.

2 if we eat food we get energy, but if there weren't chemical reaction in your body nothing happens.

Explanation:

1 Most of the digestion occurs in the first part of the small intestine while the absorption of broken down nutrients, water, vitamins, and minerals occurs in the rest of it.

Answer:

Concept: Radiology & Chemistry

Answer:

3 g of H₂

Explanation:

The balanced equation for the reaction is given below:

Cr₂O₃ + 3H₂ —> 2Cr + 3H₂O

Next, we shall determine the masses of Cr₂O₃ and H₂ that reacted from the balanced equation. This can be obtained as follow:

Molar mass of Cr₂O₃ = (52×2) + (16×3)

= 104 + 48

= 152 g/mol

Mass of Cr₂O₃ from the balanced equation = 1 × 152 = 152 g

Molar mass of H₂ = 2 × 1 = 2 g/mol

Mass of H₂ from the balanced equation = 3 × 2 = 6 g

SUMMARY:

From the balanced equation above,

152 g of Cr₂O₃ reacted with 6 g of H₂

Finally, we shall determine the mass of H₂ needed to covert 76 g of Cr₂O₃. This can be obtained as follow:

From the balanced equation above,

152 g of Cr₂O₃ reacted with 6 g of H₂.

Therefore, 76 g of Cr₂O₃ will react with = (76 × 6) / 152 = 3 g of H₂

Thus, 3 g of H₂ is needed to convert 76 g of Cr₂O₃.