Chemistry assessment

The partial pressure of N₂ : A. 0.64 atm

Dalton's law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases  

Can be formulated:  

P tot = P1 + P2 + P3 ....  

The partial pressure is the pressure of each gas in a mixture  

For partial gas :

Pgas₁=x₁.P tot

x₁ = mole fraction of gas 1

mol fraction CH₄=0.6

P tot = 1.6 atm

mol fraction N₂ :

\(\tt =1-mol~fraction~CH_4\\\\=1-0.6\\\\=0.4\)

The partial pressure of N₂ :

\(\tt =0.4\times 1.6=0.64~atm\)

River samples may evidence problems with the water treatment plant because it may contain an excessive amount of certain substances which are filtered during this procedure.

A water treatment plant is a place where wastewater from a city is processed and purified in order to obtain potable water.

Water treatment procedure generally involves the collection, chemical substance addition, filtration, and disinfection.

Any type of problem in these steps can be evidenced by taking a sample of the water after treatment.

In conclusion, river samples evidence problems due to an excessive amount of certain substances which are filtered during this procedure.

Learn more about water treatment here:

https://brainly.com/question/13348717

#SPJ1

The layers of the earth as shown in the diagram are:

The Earth is composed of four distinct layers:

The Earth's outermost layers, the crust and the brittle upper part of the mantle, are together referred to as the lithosphere. The asthenosphere, another component of the upper mantle, and the atmosphere form its boundaries.

Located under the lithosphere, the asthenosphere is a region of the Earth's mantle that is thought to be significantly hotter and more fluid than the lithosphere. Between 100 km (60 miles) and 700 km (450 miles) below the surface of the Earth is the asthenosphere.

Learn more about layers of the earth at: https://brainly.com/question/10430823

#SPJ1

The density of a block of gold with a mass of 1,932 kg and a volume of 0.1 cubic meter is 19,320 kg/m^3

Density = mass/volume

Substituting the value of mass and volume in the equation

Density= 1,932/0.1

Density= 19,320 kg/m^3

The density of an object is the ratio of mass to volume that an object occupies. The quantity of substance contained in a thing is measured by its mass. Units like grams or kilograms are frequently used to measure it.

The degree to which a mass of substance is compacted is measured by its density. A mass's density increases with how tightly packed it is in relation to the volume it takes up. On the other hand, stuff that is low density has a decreased mass-to-volume ratio.

For more information on density kindly visit to

https://brainly.com/question/29775886

#SPJ4

Answer:

Single-displacement

Explanation:

I took the test this is the correct answer!

Answer:

2.0 km/hr

Explanation:

6.0 km/3.0 hrs

= 2.0 km/hr

Hope this helps!      :3

plz mark as brainliest!

A. The mass of the water in the compound is 1 g

B. The number of mole of water is 0.056 mole

C. The mass of the copper in the compound is 0.71 g

D. The number of mole of copper is 0.011 mole

E. The mass of the chlorine in the compound is 0.79 g

F. The number of mole of chlorine is 0.022mole

How do I determine the mass and mole of the water?

We can obtain the mass of the water as follow:

Mass of water = Mass of hydrate - Mass of anhydrous

Mass of water = 2.50 - 1.50

Mass of water = 1 g

We can obtain the mole of water as follow:

Mole = mass / molar mass

Mole of water = 1 / 18

Mole of water = 0.056 mole

How do I determine the mass and mole of copper?

The mass of copper is 0.71 g

Thus, the mole of copper can be obtained as follow:

Mole = mass / molar mass

Mole of copper = 0.71 / 63.55

Mole of copper = 0.011 mole

How do I determine the mass and mole of chlorine?

The mass of chlorine can be obtained as follow

Mass of chlorine = Mass of anhydrou - Mass of copper

Mass of chlorine = 1.50 - 0.71

Mass of chlorine = 0.79 g

Thus, the mole of chlorine can be obtained as follow:

Mole = mass / molar mass

Mole of chlorine = 0.79 / 35.5

Mole of chlorine = 0.022mole

Learn more about mole:

https://brainly.com/question/13314627

#SPJ1

Answer:

Chemical reaction A, because the reactant is a compound

Explanation:

In a decomposition reaction, a compound is broken down into its components, so the number of products is greater than the number of reactants

Chemical reaction A, because the reactant is a compound is a statements correctly identifies the decomposition reaction and describes a substance involved.

When atoms establish or break chemical bonds, chemical processes take place. Reactants are the substances that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.

Although a chemical reaction is not always a "one-way street," as we'll examine further in the next section, an arrow is drawn between the reactants and products to denote the direction of the reaction.

 Our equation must have them in it in order for there to be an equal number of atoms of each element on both sides of the equation.

Therefore, Chemical reaction A, because the reactant is a compound is a statements correctly identifies the decomposition reaction and describes a substance involved.

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

https://brainly.com/question/29039149

#SPJ2

Answer:

There is something wrong with my cell phone. It doesn't have your number in it.

Explanation:

The reaction is an example of a decomposition reaction in which Zinc Carbonate is decomposed into two products that is Zinc oxide and Carbon dioxide.

Zinc carbonate is an odorless and white sand-like solid. It is insoluble in water and is used in cosmetics, ointments, porcelain, pottery and rubber.

When Zinc carbonate is heated, it produces Zinc oxide and Carbon dioxide. When white powdery solid Zinc carbonate is heated, it turns yellow.

Carbon dioxide gas evolved is confirmed by passing the gas over lime water and it turns the lime water milky.

The reaction is:  ZnCO3 --> ZnO + CO2

The reaction is an example of a decomposition reaction in which Zinc Carbonate is decomposed into two products that is Zinc oxide and Carbon dioxide.

To know Zinc carbonate, refer

https://brainly.com/question/17205902

#SPJ4

Answer:

75L of additional water to have a pH 1 solution

Explanation:

The reaction of HCl With NaOH is:

HCl + NaOH → H₂O + NaCl

By using molar mass of each reactant you can know how many moles will react, thus:

HCl: 364.6g HCl ₓ (1mol / 36.46g) = 10 moles HCl

NaOH: 80g NaOH ₓ (1mol / 40g) = 2 moles NaOH

That means after the reaction will remain in solution, 10-2 = 8 moles of HCl = 8 moles of H⁺ (In water, HCl dissociates as H⁺ and Cl⁻ ions).

A solution with pH = 1 contains:

pH = -log [H⁺]

1 = -log [H⁺]

0.1M = [H⁺]

As molarity, M is the ratio between moles and liters and you want a solution 0.1M having 8 moles of H⁺ you require:

0.1M = 8 moles H⁺ / 80L

As the student combines the solution with 5L of water, you require

Answer:

sucrase-isomaltase

Explanation:

The molecular formula of thioformaldehyde can be determined using the given information about its molar mass and percentage composition of elements.The most likely Lewis structures for thioformaldehyde are Structure 2 and Structure 3.

Step 1: Convert the percentage composition to grams.
- The compound is 26.06% carbon (C), 69.57% sulfur (S), and 4.37% hydrogen (H) by mass.
- Assume we have 100g of the compound, then we would have 26.06g of carbon, 69.57g of sulfur, and 4.37g of hydrogen.
Step 2: Convert the grams of each element to moles.
- Use the molar mass of each element to convert grams to moles.
- The molar mass of carbon (C) is 12.01 g/mol, sulfur (S) is 32.07 g/mol, and hydrogen (H) is 1.01 g/mol.
- Calculate the moles of each element by dividing the grams by the molar mass.
- Carbon: 26.06g / 12.01 g/mol = 2.17 mol
- Sulfur: 69.57g / 32.07 g/mol = 2.17 mol
- Hydrogen: 4.37g / 1.01 g/mol = 4.33 mol
Step 3: Determine the empirical formula.
- The empirical formula represents the simplest ratio of atoms in a compound.
- Divide the moles of each element by the smallest number of moles to get the simplest ratio.
- In this case, the smallest number of moles is 2.17, which is the number of moles for carbon and sulfur.
- Carbon: 2.17 mol / 2.17 mol = 1
- Sulfur: 2.17 mol / 2.17 mol = 1
- Hydrogen: 4.33 mol / 2.17 mol = 2
- The empirical formula is CH2S.
Step 4: Determine the molecular formula.
- The molecular formula represents the actual number of atoms in a compound.
- To determine the molecular formula, we need to know the molar mass of the empirical formula.
- The molar mass of CH2S is 12.01 g/mol + 2(1.01 g/mol) + 32.07 g/mol = 46.1 g/mol.
- Since the molar mass of thioformaldehyde is given as 46.086 g/mol, the molecular formula is the same as the empirical formula, CH2S.
Now let's move on to drawing the possible Lewis structures of thioformaldehyde and determine which structure is more likely to resemble the real molecule using formal charge.
Lewis structure is a diagram that shows the bonding and non-bonding electrons in a molecule.

Possible Lewis structures for thioformaldehyde (CH2S) include:
Structure 1:
     H    H
      \  /
       C=S
       |
       H
Structure 2:
     H    H
      \  /
       S=C
       |
       H
Structure 3:
     H    H
      \  /
       S=C
       |
       H
In each structure, the carbon atom is bonded to two hydrogen atoms and one sulfur atom. The sulfur atom is bonded to the carbon atom through a double bond.

To determine which structure is more likely to resemble the real molecule, we need to consider the formal charges.
The formal charge on an atom is the difference between the number of valence electrons in an isolated atom and the number of electrons assigned to that atom in a Lewis structure.
In general, a structure with the lowest formal charges on the atoms is more likely to resemble the real molecule.
In Structure 1, the carbon atom has a formal charge of +1, the sulfur atom has a formal charge of -1, and the hydrogen atoms have a formal charge of 0.
In Structure 2, the sulfur atom has a formal charge of 0, the carbon atom has a formal charge of 0, and the hydrogen atoms have a formal charge of 0.
In Structure 3, the sulfur atom has a formal charge of 0, the carbon atom has a formal charge of 0, and the hydrogen atoms have a formal charge of 0.
Based on the formal charges, Structure 2 and Structure 3 are more likely to resemble the real molecule since all the atoms have formal charges of 0.

To know more about molecular formula  visit:-

https://brainly.com/question/34012285

#SPJ11

Yes, the qs for the formation and decomposition of 1 mol of NO have opposite signs.

The heat of formation, or the heat absorbed when 1 mol of a substance is formed from its elements, represents the symbol qf. The heat of decomposition or the heat is given off when 1 mol of a substance breaks down into its elements, is represented by the symbol qd. The relationship between the two qs is that qf and qd are equal in magnitude but opposite in sign; qf is negative and qd is positive.

The relationship between qf and qd is that they are equal in magnitude but opposite in sign. For example, if qf for the formation of NO is -100 kJ, then qd for the decomposition of NO will be +100 kJ.

In summary, qf and qd is the heat absorbed or released during the formation and decomposition of a substance respectively. They are equal in magnitude but opposite in sign. The heat absorbed during formation is negative and the heat released during decomposition is positive.

Learn more about thermochemistry here: https://brainly.com/question/29137878

#SPJ4

Answer:

because they take thousands or even millions of years to naturally replenish or replaced , which is not the average human lifetime

The change in size is a physical property and and the heat evolution by burning is a chemical property. Hence,  option c is correct.

Physical properties of a substance involves, change in state, size or shape. They does not involve formation of a new compound and thus does nit undergo breaking or making of chemical bonds.

A chemical change involves the breaking or making of chemical bonds results in the formation of a new product. The change in size of a material by stretching it is a physical change.

Burning a material involves breaking of bonds and the formation of ash and other side products. Hence, option c is correct. C is a chemical property and D is a physical property.

Find more on physical properties:

https://brainly.com/question/18327661

#SPJ1

Answer:

Without the respiratory system your blood would be useless. The circulatory and respiratory systems work together to circulate blood and oxygen throughout the body

Explanation:

Explanation:

—COOH and —NH₂

Carboxylic Acid and Amino

The ratio of concentrations of bicarbonate to carbonic aciddin a blood sample with a pH of 6.2 is approximately 3.98:1.

The Henderson-Hasselbalch equation can be used to calculate the ratio of bicarbonate to carbonic acid. The equation is given by pH = pKa + log([HCO3-]/[CO2]).

Given a pH of 6.2 and a pKa of carbonic acid as 6.37, we can rearrange the equation and solve for the ratio [HCO3-]/[CO2].

Using the equation, we find that log([HCO3-]/[CO2]) = pH - pKa = 6.2 - 6.37 = -0.17.

Taking the antilog of -0.17, we find that [HCO3-]/[CO2] ≈ 0.445.

To obtain the ratio of bicarbonate to carbonic acid, we can invert the value: [CO2]/[HCO3-] ≈ 1/0.445 ≈ 2.24.

Converting to a whole number ratio, the ratio of concentrations of bicarbonate to carbonic acid is approximately 3.98:1.

The ratio of bicarbonate to carbonic acid in a blood sample with a pH of 6.2 is approximately 3.98:1. This ratio is crucial for maintaining the acid-base balance in the body and plays a significant role in regulating blood pH and bicarbonate buffering.

To know more about bicarbonate to carbonic acid click here:

https://brainly.com/question/32806422

#SPJ11

Answer

so AI has 13 atoms

S has 16 atoms

Na has 11 atoms

P has has 15 atoms

so the one with the most is S

S is sulfur

sulfur has many uses when it is processed along with some some biological uses.

Explanation:

Answer:

Well,

3

×

N

A

oxygen atoms..

Explanation:

Where

N

A

≡

Avogadro's number

≡

6.022

×

10

23

⋅

m

o

l

−

1

.

And so if wl1

oxygen atoms...

i.e.

18.066×

1023

⋅

oxygen atoms..

Answer:

Please write your completely question.

Human Movement is important because it most commonly used to insure optimal athletic ability. It can also be used to identify the cause of most common sports injuries and movement-related problems. The name for this type of study is called Kinesiology. This is a very necessary part of students understanding dance, sports, and physical well-being. Studying Kinesiology results in better physical performance, as well as many cardiovascular improvements. Kinesiology is used to answer many still unknown question about human movement.

Answer: Wind energy, mechanical energy, electrical energy, and thermal energy.

Explanation:

In this example, the following forms of energy are occurring in order of first to last:

So, the forms of energy occurring in this example are wind energy, mechanical energy, electrical energy, and thermal energy.

Answer:

For organic compounds, carbon and hydrogen are listed as the first elements in the molecular formula, and they are followed by the remaining elements in alphabetical order. For example, for butane, the molecular formula is C 4 H 10.

Explanation:

Answer:

True

Explanation:

Clouds and fog both form when water vapor condenses or freezes to form tiny droplets or crystals in the air, but clouds can form at many different altitudes while fog only forms near the ground. Both fog and clouds are formed when water vapor condenses or freezes to form tiny droplets or crystals in the air.

The labeled carbon in the fatty acid, 14CH₃(CH₂)15COOH, is located at the omega (ω) end of the molecule, which is the last carbon atom.

Therefore, upon oxidation of this fatty acid, the labeled carbon would not enter the citric acid cycle directly, but rather undergoes beta-oxidation to yield acetyl-CoA. During beta-oxidation, two-carbon units are cleaved from the fatty acid chain and converted to acetyl-CoA. Thus, the 14C label would eventually end up in acetyl-CoA.

The other compounds listed (beta-hydroxybutyryl-CoA, malonyl-CoA, propionyl-CoA, and bicarbonate) are not intermediates in beta-oxidation and would not contain the radiolabeled carbon from the fatty acid.

To learn more about fatty acid refer to:

brainly.com/question/1837143

#SPJ4