hello guyz who ever answers will get 100 pts​

Answer:

The Heat of Reaction (also known and Enthalpy of Reaction) is the change in the enthalpy of a chemical reaction that occurs at a constant pressure. It is a thermodynamic unit of measurement useful for calculating the amount of energy per mole either released or produced in a reaction.

Answer:

C. 176 grams

Explanation:

48g / (12g/mol) = 4.0mol. Moles of Oxygen used. = 128g / (32g/mol) = 4.0mol. C + O2 => CO2. Therefore ...

Answer:

Ga + 6HNO3 → Ga(NO3)3 + 3NO2 + 3H2O

Explanation:

Gallium has an ionic charge of 3+, so three nitrate ions are needed to balance it out.

Answer:

teeth chewing food

Explanation:

When teeth chews food it change its state from hard solid to fine substance that can be easily digested by the body i guess

Anwser:

Research scientific principles involved in water availability.

Explanation:

Before building or investment you always want to see and know what your up against and what the best way to help or solve is. Researching why there's a problem in water availability or/and the principals to water availability will help you see what the problem is with what's happening to and around the process and it's environment.

Answer:

law of conservation of energy

Answer:

oxygen

Explanation:

One mole of atoms of oxygen has a mass of 16 g, as 16 is the atomic weight of oxygen, and contains 6.02 X 1023 atoms of oxygen.

Answer:

extraction technology.....

Answer:

it allow us to compare the amount of energy passing through each tropical level over a period of time

Answer:

should be a or d, though im leaning towards d more. sadly can't narrow it down 100%. b nor c are correct since they are made out of wood and plastic which cannot allow electricity to pass by. copper and metal are effective conductors of electricity, which a steel knife and a glass tube is made out of.

From the information in the question, the formula unit of the salt is given as VCl.

The quantity of charge produced is obtained from;

Q = It

I = current (3 A), t = time (3600 s)

Q = 3 A × 3600 s

Q = 10800 C

Now we need to find the number of electrons transferred as follows;

51 g of Vanadium is deposited by 96500n C

5.70 g is deposited by 10800 C

5.70 × 96500n = 51 × 10800

n =  51 × 10800/5.70 × 96500

n = 1

The formula of the salt is VCl.

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Answer:

Secondary waves

A type of seismic body wave in which rock particles vibrate at right angles to the direction of wave travel. Secondary waves cause the rocks they pass through to change in shape.

The molecular formula of the compound is C12H15O3 hence the molar mass of the compound is 207 g/mol.

We need to obtain the number of moles of carbon, hydrogen and oxygen in the compound;

Carbon = 24.91 g/44g/mol × 1 mole of carbon = 0.566 moles

Mass of carbon =  0.566 moles × 12 g/mol = 6.792 g

Number of moles of hydrogen = 6.522 g/18 g/mol × 2 moles = 0.725 moles

Mass of hydrogen = 0.725 moles  × 1 g/mol = 0.725 g

Mass of oxygen = 10 - (6.792 g + 0.725 g) = 2.483 g

Number of moles of oxygen = 2.483 g/16 g/mol = 0.155 moles

Now we must divide through by the lowest number of moles;

C - 0.566/0.155   H - 0.725/0.155     O - 0.155/0.155

C - 4                    H - 5                        O - 1

The simplest formula is C4H5O Recall that the molar mass of the compound lies between 150.0 and 220.0 g/mol

4(12) + 5(1) + 16 = 69

Hence; n = 3 and the molecular formula of the compound is C12H15O3

The molar mass of the compound is; 12(12) + 15(1) + 3(16) = 207 g/mol

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In the first case, the molarity of oxygen gas is 0.0012 mol/L. In the second case, the molarity of oxygen gas is 0.0052 mol/L .

We have to obtain the number of moles of oxygen as follows;

P = 1.00 atm

V = 28.31 mL or 0.02831 L

n = ?

R = 0.082 atm LK-1mol-1

T = 25 °C + 273 = 298 K

n = PV/RT

n=  1.00 atm × 0.02831 L/ 0.082 atm LK-1mol-1 ×  298 K

n = 0.0012 moles

Molarity = Number of moles/Volume = 0.0012 moles/1.00 L =  0.0012 mol/L

For the second case;

P = 4.47 atm

V = 28.31 mL or 0.02831 L

n = ?

R =  0.082 atm LK-1mol-1

T = 25 °C + 273 = 298 K

n = PV/RT

n = 4.47 atm ×  0.02831 L/0.082 atm LK-1mol-1 × 298 K

n = 0.1265/24.436

n = 0.0052 moles

Molarity of oxygen = 0.0052 moles/1.00 L = 0.0052 mol/L

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The mass of KCl that exists in 20.3 g of solution containing 1.14% by mass of KCl is 0.23 g

From the question given above, the following data were obtained:

Mass of solution = 20.3 g

Percentage of KCl = 1.14% = 1.14 / 100 = 0.0114

[tex]Percentage = \frac{mass of solute}{mass of solution} * 100\\\\0.0114 = \frac{mass of KCl}{20.3} \\\\[/tex]

Cross multiply

Mass of KCl = 0.0114 × 20.3

Therefore, the mass of KCl in the solution is 0.23 g

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Explanation:

Our Direct Nanofiltration (dNF) membranes offer the unique combination of a low fouling hollow fiber configuration with the ability to remove organics and salinity (hardness) from water in one simple step. Other than a strainer, no further pre-treatment is required. We manufacture our membranes with a patented layer-by-layer process, where multiple nano-scale layers are deposited on a membrane support. This method enables very precise and controlled rejection and flux properties of the membrane. A unique solution for troubled water.

Explanation:

I think third(white) isn't a redox reaction

Answer:

Melting

Explanation:

Ice begins to melt at 0 degrees celsius

Melting is from solid to liquid

Freezing is from liquid to solid

Sublimation is from solid to gas

Deposition is from gas to solid

perdon no se es que es para que me dé ingreso

Answer:

At temperatures > 400 °C, CCl4 reacts with H2O over a MgO catalyst to yield HCl and CO2.

Answer:

heat energy released by the substance

The energy change that takes place during deposition is that heat energy is released by the substance. This statement is true about deposition.

Deposition is a phase transition that occurs when a gas is converted directly to a solid without passing through the liquid state. During deposition, energy is released by the gas particles and absorbed by the surface, resulting in a decrease in the energy of the gas particles and an increase in the energy of the surface particles.As a result, the substance releases heat energy as it changes from a gas state to a solid state.

Therefore, the correct option is:Heat energy released by the substance.

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#SPJ5

The correct name for the covalent compound that  contains five oxygen atoms and two phosphorus atoms is Diphosphorus pentoxide.

The covalent compound has a combination of phosphorus and oxygen.

The oxygen atoms is 5 and the phosphorus atoms is 2.

Therefore, the combination can be represented chemically as follows:

The standard name for this compound is Diphosphorus pentoxide.

The prefix di simply means phosphorus is 2 atoms.

The pent indicates 5 atoms of oxygen.

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The back torn of Camel is important because it acts as a storage facility for

fats.

Camels are found in desert regions where there is scarcity of

This makes the food it eats to get stored at the back in the hump

region as fats so as to enable it survive long periods of unavailability of food.

The fats are gradually metabolized into nutrients which is used by the body

cells to ensure adequate energy availability and optimal survival.

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Explanation:

option C is correct!

hope this answer helps you dear!

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The Correct choice is ~ C

Atomic mass of Sulfur (S) is 32.1 u

Answer:

B) Ivory

Explanation:

Ivory is a hard, white material from the tusks and teeth of animals, that consists mainly of dentine, one of the physical structures of teeth and tusks.

Platinum, Silver, and Gold are precious metals, meaning they are rare metallic chemical elements of high economic value, shiny, hard, strong with high melting points

Ivory is regarded as the least of the options. Ivory consists of dentine and

are usually found in the tusks and teeth of animals such as elephants. They

however don't have much value as the other metals in the options.

Precious metals  include the following:

They are used for ornamental purposes. They are usually mined and refined

to produce a variety of objects.

Their use are however legal and they are expensive which makes the Ivory

the least out of the options provided.

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Answer:

The answer to these are:

(A) 32

(B) If it is balanced 32

(C) 80

Explanation:

Answer:

17) b

18) c

19) c

20) c

21) b

22) D

23) b

24) b

25) a

26)?

27) D

28) b

29) D

30) c