Pls help with this

Answer:

Biochemistry or biological chemistry, is the study of chemical processes within and relating to living organisms

Explanation:

Answer:

The correct answer is the epipelagic zone

Answer:

The number of protons in an atom is unique to each element. For example, carbon atoms have six protons, hydrogen atoms have one and oxygen atoms have eight. The number of protons in an atom is referred to as the atomic number of that element. The number of protons also determines the chemical behavior of the element. GOOD LESSONS ♡

Answer:

D. The anode​

Explanation:

The anode​ is oxidized in a galvanic cell. Therefore, option D is correct.

A galvanic or voltaic cell is an electrochemical device that transforms the chemical energy of spontaneous redox reactions into electrical energy. electrical cell A voltaic cell is an electrochemical device that produces electricity through chemical processes.

An electrochemical cell called a galvanic cell or voltaic cell, respectively named after the scientists Luigi Galvani and Alessandro Volta produces an electric current by spontaneous oxidation-reduction reactions.

Since electrons are left on the electrode when oxidation occurs, the anode, the electrode where oxidation happens, is the negative electrode in a galvanic cell.

Thus, option D is correct.

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Answer:

The answer is D

Explanation:

I recently took a test with the same question and it said the answer was correct

I hope this helps and have a nice day <3

Answer:

WOWOWWOWOOWOWOWOW

Explanation:

Answer:

For number 2, your answer is C.

Explanation:

The nucleus is positively charged because the proton is positive and a neutron is neutral. An electron has a negative charge.

Answer:

Explanation:

It starts with the company getting a GS1 Company Prefix Before a firm starts to use a barcode it has to come up with the GS1 Identification Keys which are the numbers that represent the company’s barcode. When the GS1 identification key is assigned, the firm acquires the GS1 Company Prefix that will enable the firm to create the identification keys for its goods, locations, trade items and coupons which will be unique to it worldwide.

Answer:

they remain liquid

Explanation:

because liquid in liquid mostly doesn't have any affect on the state of the matter

as,

water added to juice

remains liquid

Answer:To determine the weight of the asphalt needed, first determine the area of the surface to be paved.

Since the shape of the road is a rectangle, use the formula of area of rectangle.

A = Length xx Width

Before plugging-in the values, convert the 2.5 miles to feet in order that the dimension to have same unit.

So,

2.5 mi xx (5280 ft)/(1mi) = 13200ft

Now that the length is in feet, plug-in the values of dimension of the road to the formula of area of rectangle.

A=13200*24

A=316800

Hence, the area to be paved is 316 800 ft^2 .

Next, determine the volume. Use the formula:

V = Area xx thickness

Before substituting the values, convert the thickness to feet in order to have same units.

So,

3 i n xx (1ft)/(12 i n)=0.25ft

Then, substitute the values of the area and thickness to the formula of volume.

V=316800*0.25=79200

Thus, the volume of the asphalt needed is 79200 ft^3.

Next, to determine its weight , multiply that with the given density 1479 pounds per cubic feet (1479 lb/ft^3).

W=79200*1479=117136800

So, the weight is 11 7136 800 lbs.

Then, convert it to tons.

117136800 lbs xx (1t o n)/(2000lbs) = 58568.4 t o n s

Explanation:i did the math

Answer:

Explanation:

An oxidation reaction has the following properties;

The reduction reaction is the opposite of the points mentioned above;

1. Occurs when atoms gain electrons during bonding: Reduction

2.  Occurs when the oxidation number of an element decreases in chemical reaction: Reduction

3.  Occurs when atoms lose electrons during bonding: Oxidation

4.  F + e- ----> F-  : Reduction

5.  Occurs when the oxidation number of an element increases in chemical reaction: Oxidation

6.  2I- ----> I2 + 2e- : Oxidation

Answer:

Method 1 isn't safe for humans.

Answer: Method 2 is not environment friendly, or D.

Explanation: Recycled water, or graywater, is very harmful to the fish and if used to contain them within the farm, it would make the fish overall very sick, and the fish would be refused from being sold into stores. Thus, this is the correct answer.

Answer:

human behovoir

Explanation:

Explanation:

The answer would be Berium because it can mix as well with other elements in the periodic table.

Barium is regarded as the most reactive elements out of all the options

provided.

Barium is an element with symbol Ba and atomic number 56. It belongs to

Group 2 metals whose reactivity increases as we go down the group.

The alkaline earth metals which are in Group 2 of the Periodic Table include

: beryllium, magnesium, calcium, strontium, barium, and radium

The increase in reactivity down the group is as a result of the decreasing

ionization energy required to form new compounds. The Ionization energy

decreases due to more inner shells and increase in distance from the

nucleus.

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Answer:

The final pressure is 0.788 atm (option b).

Explanation:

Boyle's law says that the volume occupied by a given gaseous mass at constant temperature is inversely proportional to pressure. That is: if the pressure increases, the volume decreases, while if the pressure decreases, the volume increases. This is expressed mathematically as the product of pressure times volume equal to a constant value:

P*V=k

Assuming a certain volume of gas V1 that is at a pressure P1 at the beginning of the experiment, by varying the volume of gas to a new value V2, then the pressure will change to P2, and it will be fulfilled:

P1*V1=P2*V2

In this case:

Replacing:

2.14 atm*3 L= P2* 8.15 L

Solving:

[tex]\frac{2.14 atm*3 L}{8.15 L} =P2[/tex]

0.788 atm= P2

The final pressure is 0.788 atm (option b).

Answer:

The dot between KAl(SO4)2 and 12 H2O in the formula indicates that twelve moles of water are associated with every mole of KAl(SO4)2. Therefore, the mass of the twelve water molecules, called the waters of hydration, must be included in the molecular weight of the compound.

Explanation:

The mass of the twelve water molecules are included in the molecular weight of the compound ,therefore the given statement is true.

Molecular weight is the sum of all atoms in a molecule. Molecular weight is represented in the atomic mass unit . It tells us the number of grams of a substance is present in one mole of that compound.

Molecular weight is based on the molecular formula of a compound.

According to the question, the dot between K Al(SO4)2 and 12 H2O in the formula indicates that twelve moles of water are associated with every mole of K Al(SO4)2.

And because of this the mass of the twelve water molecules, called the waters of hydration, must be included in the molecular weight of the compound.

The twelve hydrated water molecules of alum are included in the molecular weight, hence the given statement is true.

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Answer:

condensation is NOT part of the carbon cycle

Explanation:

Answer:

a. No information is required.

b. The volume of the solution.

Explanation:

Hello!

In this case, since hydrates are salts which have additional water in their structures, when making mole-mass calculations involving them, we need to consider the how many water molecules we find in the hydrate. In such a way, for 0.430 g of cobalt nitrate hexahydrate (six water molecules), we proceed as follows:

a. Since we have 0.430 g of hydrate, we may compute the moles of anhydrous cobalt nitrate by using the molar mass of the hydrate (291.04 g/mol) and then, by noticing that one mole hydrate has one mole of anhydrous, we are able to compute the moles of anhydrous cobalt nitrate as shown below:

[tex]0.430gCo(NO_3)_26H_2O*\frac{1molCo(NO_3)_26H_2O}{291.04gCo(NO_3)_26H_2O} *\frac{1molCo(NO_3)_2}{1molCo(NO_3)_26H_2O}\\\\=1.48x10^{-3}mol Co(NO_3)_2[/tex]

It means no further information is required.

b. Since the molarity is defined by the division of the moles of solute over liters of solution (M=mol/V), we would need the volume of the solution to successfully compute it.

Bes regards!

Answer:

0.87mole

Explanation:

The reaction equation is given as;

    4Fe + 3O₂  →  2Fe₂O₃

Number of moles of Fe₂O₃ in 138.5g

To solve this problem;

 Number of moles = [tex]\frac{mass}{molar mass}[/tex]

Molar mass of Fe₂O₃ = 2(56) + 3(16) = 160g/mol

 Now;

          Number of moles  = [tex]\frac{138.5}{160}[/tex]   = 0.87mole

Answer:

Stan Loona

Explanation:

Answer:

i dont feel like sending out my socials but if you can send me a picture of the problems on here i would be happy to help for free

Explanation:

i dont know if im going to be right about the questions but i can try

Answer:

Volume of NCl3 is 3L

Explanation:

Avogadro states: All gases at the same volume under temperature and pressure constant have the same number of moles.

The chemical equation is:

3Cl2(g) + N2(g) → 2NCl3(g)

Where 3 moles of chlorine reacts with 1 mole of nitrogen to produce 2 moles of NCl3.

But using Avogadros law we can say:

3L of chlorine and 1L of nitrogen produce 2L of Nitrogen trichloride.

3L of chlorine and 1L of nitrogen: 4L (The stoichiometric mixture)

That means, volume of NCl3 produced is 3L

Answer:

When something crashes it affects the motion of an object because what it crashed into had force going in the opposite direction.

Explanation:

Answer:

I think Its B

Explanation:

Answer:

the answer is:

no, because the reactivity of elements decreases from right to left on the periodic table.

Explanation:

In Metals:

Period - reactivity decreases as you go from left to right.

Group - reactivity increases as you go down a group

In Non-metals

Period - reactivity increases as you go from the left to the right.

Group - reactivity decreases as you go down the group.

Reactivity:

The reactivity of the elements increases going from left to right on the periodic table. Each element going from left to right tends to be more reactive. The electronegativity increases going from left to right, and it decreases going down the table.

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Answer:

change in size or shape

Explanation:

Answer: hey

Explanation:

H and F is the pair of atom which ahs polar covalent bond. Thus option b is correct.

Polar covalent bond is defined as type of chemical bond where a pair of electrons is unequally shared between the two atoms due to the difference in their electronegativity.

HCl, H2O and HF etc. are some of the examples of polar covalent bond.

Non polar covalent bond is defined as type of chemical bond with equal sharing of the bond electron rises when the electronegativity of the two atoms are equal.

H2, N2, O2 etc. are some of the examples of non polar covalent bond.

Thus, H and F is the pair of atom which ahs polar covalent bond. Thus option b is correct.

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Your question is incomplete, but probably your complete question was

Which pair of atoms would form a polar covalent bond?

a. H and H

b. H and F

c. N and N

d. Na and F

Answer:

soap

Explanation:soap

Answer:

A molecule with polar and nonpolar ends

Explanation:

Answer:

(Mechanism in attachment).

Explanation:

The Williamson ether synthesis is the most used method to form ethers, in which an alkoxide ion reacts with a primary alkyl halide in an SN₂ reaction. Usually, the alkoxide ion is prepared by the reaction of an alcohol with a strong base like sodium hydride, NaH.

The alkyl halide must be primary so an attack by the backside is not impeded. When the alkyl halide is not primary, the result is usually an elimination.

Mechanism

Step 1: form the alkoxide of the alcohol considering the most impeded group (in this case, the 4-methoxyphenol).

Step 2: the alkoxide displaces the leaving group from a good SN₂  substrate (the propyl bromide).

Therefore, in Williamson ether synthesis, the alkyl halide must be a good SN₂ substrate (generally primary). We choose the alkyl group less impeded to be the halide and the most impeded group to be the alkoxide ion.

Answer: it is C, why molecules have different shapes.

Explanation:

A P E X

The VSEPR theory (Valence Shell Electron Pair Repulsion theory) describes why molecules have different shapes.

C. Why molecules have different shapes.

The VSEPR theory is a model used to predict the shapes of molecules based on the repulsion between electron pairs in the valence shell of the central atom. It states that electron pairs, whether bonding or non-bonding, repel each other and tend to position themselves as far apart as possible to minimize electron-electron repulsion. This repulsion determines the spatial arrangement and overall shape of the molecule.

By considering the number of electron pairs around the central atom and the repulsion between them, the VSEPR theory can predict molecular geometries, including linear, trigonal planar, tetrahedral, trigonal bipyramidal, and octahedral, among others. It explains why molecules such as water (H₂O) have a bent shape or why carbon dioxide (CO₂) is linear.

Therefore, the correct answer is C. The VSEPR theory describes why molecules have different shapes by considering the repulsion between electron pairs in the valence shell of the central atom.

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