Fe2O3 + 3 C ---> 2 Fe + 3 CO


How many g Fe will form from 72 g C ?

molar mass Fe = 55 g/mol
molar mass C = 12 g/mol


A: 220

B: 55

C: 495

D: 0.87

Answer:

but what is your question? it's just like the moon going around earth while earth along with all the other planets revolve around the sun

Explanation:

Answer:

59K

Explanation:

Using the general gas law equation:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas constant (0.0821 Latm/molK)

T = temperature (K)

According to the information given in the question;

- mass of hydrogen gas = 20.2g

mole = mass/molar mass

mole = 20.2/2.015

mole = 10.01mol

- Pressure = 110 Kpa

1 kilopascal = 0.00987 atmosphere

110kPa = 110 × 0.00987

= 1.09atm

- Volume = 4.45 x 10^-2 kL

1 kL = 1000L

4.45 x 10^-2 kL = 4.45 x 10^-2 × 10³

4.45 × 10¹

= 44.5L

Using PV = nRT

T = PV/nR

T = 1.09 × 44.5/0.0821 × 10.01

T = 48.505/0.821

T = 59.02

T = 59K

Answer:

ΔG° = 80 Kj/mole

Explanation:

ΔG° = -R·T·ln(Kw)

R = 0.008314 Kj/mol·K

T = 25°C = 298K

Kw = 1 x 10⁻¹⁴

ΔG° = -R·T·ln(Kw) -(0.08314Kj/mol·K)(298K)ln(1 x 10⁻¹⁴)

= -(0.008314)(298)(-32.2)Kj/mole

= 79.78Kj/mole ≈ 80Kj/mole (1 sig.-fig.)

The change in free energy for the autoionization of water at 25°C is -79.9 KJ

Using the formula;

ΔG = -RTlnK

ΔG  = change in free energy = ?

R = gas constant = 8.314 J/K/mol

T = temperature = 298 K

K = equilibrium constant = 1.0 X 10^-14

Substituting into the given formula as;

ΔG = -  (8.314 J/K/mol × 298 K × ln(1.0 X 10^-14))

ΔG = -7.99 × 10^4 J/mol or -79.9 KJ/mol

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Answer:

Substance-I just did this

Explanation:

Something that is made of all the same atoms or groups of atoms is called element. Atoms from at least one or maybe more elements.

A substance that's unable to be converted into another substance is known as an element. Each of the approximately 100 elements has a unique form of atom. Atoms from at least one or maybe more elements are present in everything in the cosmos.

All known elements are listed in the periodic table, with those with related properties being grouped together. The majority of elements are lustrous metals that are excellent conductors of electricity. Iron, gold, and aluminum are metals that are solid at ambient temperature.

Therefore, something that is made of all the same atoms or groups of atoms is called element.

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Answer:

0.6 atm

Explanation:

I'm not sure about this though...

NIST employs a 20 °C (293.15 K, 68 °F) temperature and a 1 ATM absolute pressure (14.696 psi, 101.325 kPa). This standard is also known as normal pressure and temperature (abbreviated as NTP).

Originally, the term "atmosphere" referred to the air pressure at sea level. Later, it was determined to be 1.01375 x 105 pascals. 100 kilopascals are the unit of pressure known as a bar. Consequently, 1 ATM = 1.01325 bar, or that one atmosphere is almost equal to one bar.

101,325 pascals, or newtons of force per square meter, is the equivalent of one standard atmosphere, sometimes referred to as one atmosphere (approximately 14.7 pounds per square inch). also see millibar The atmosphere and atmospheric pressure unit are related topics.

The answer is 0.6 ATM

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Answer:

Change in colour will be the answer.

Answer:

6

Explanation:

if you start with 12 atoms of carbon and its called the half life of carbon what is half of 12

Answer:

6 Atoms

Explanation:

Ap3x

Answer:

A mixture is when two substances are physically combined and can be taken apart.

Explanation:

my words

Answer:

Since 1982, STP is defined as a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of exactly 105 Pa (100 kPa, 1 bar).

Explanation:

I hope I helped

Answer:

a. Wiley has to find a way out of the tree he ran up.

b. Wiley has to trick the Hairy Man into turning himself into animals.

c. Wiley has to ask his mama for help to defeat the Hairy Man.

d. Wiley has to defeat the Hairy Man three times to make him go away.

Answer:

Wiley has to defeat the Hairy man three times to make him go away

Explanation:

Answer:

4 covalent bonds

Explanation:

Answer:

two valence electrons

Explanation:

Answer:

C. reproduction​

Explanation:

Answer:

8.82 kg es la masa total de leche

Explanation:

Consideraremos que el volumen de cada bolsa de leche es de 900 mL.

Sabiendo que tenemos en total 7 bolsas, el volumen final en litros que tenemos disponible es de:

900 mL . 7 = 6300 mL

Utilizando la densidad podemos calcular la masa de leche que tenemos en el total de las 7 bolsas

Densidad = masa / volumen

Densidad . volumen = masa → 1.4 g/mL . 6300 mL = 8820 g

Convertimos la masa de gramos a kg

8820 g . 1 kg /1000g = 8.82 kg

The maximum number of mole of water that can be produced is 3 moles (Option A)

C₅H₁₂ + 8O₂ —> 5CO₂ + 6H₂O

From the balanced equation above,

8 moles of O₂ reacted to produce 6 moles of H₂O

From the balanced equation above,

8 moles of O₂ reacted to produce 6 moles of H₂O.

Therefore,

4 moles  of O₂ will react to produce = (4 × 6) / 8 = 3 moles of H₂O.

Thus, we can conclude that the maximum mole of water produced is 3 moles

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so, here's your answer, 15.5L (appr)

Answer:

A. PO4^3-

Explanation:

took the quiz on a pex

The conjugate base of HPO₄²⁻ is PO₄³⁻. Therefore, option (A) is correct.

The Bronsted-Lowry concept can be explained as an acid-base reaction where base and acid react with each other and by an exchange of proton acid, forms its conjugate base and the base generates its conjugate acid.

The Bronsted-Lowry theory is an extended version of Arrhenius's theory of acid-base. According to this concept, acid can be defined as a substance that donates a hydrogen ion or a proton and produces its conjugate base and the base can be defined as a substance that accepts a proton and creates its conjugate acid.

Bronsted-Lowry acid in the dissociation form can be represented as:

Acid   ⇄   Conjugate base +   H⁺

The conjugate base of Bronsted-Lowry acid HPO₄²⁻ can be represented as follows:

HPO₄²⁻   ⇄  PO₄³⁻ +   H⁺

Therefore, PO₄³⁻ is the conjugate base of the Bronsted-Lowry acid HPO₄²⁻​.

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Answer:

it gained

Explanation:

therefore it is an anion cause it is negatively charged ion

Explanation:

A system formed by the interaction of a community of organism with their physical environment is called ecosystem.

A. a squirrel and it physical surroundings.

Answer:

A substance which burns in air and tends to produce heat and light is known as Combustible substances. Non-combustible substances are certain substances which are not combustible in the presence of air. Will not burn on being exposed to flame.

Answer:

A substance which burns in air and tends to produce heat and light is known as Combustible substances. Non-combustible substances are certain substances which are not combustible in the presence of air. Will not burn on being exposed to flame.

Explanation:

Answer:

45.3 KPa

Explanation:

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

Total pressure (Pₜ) = 101.3 KPa

Pressure of Hydrogen (Pₕ) = 56 KPa

Pressure of Oxygen (Pₒ) =?

The pressure of oxygen in the mixture can be obtained as follow:

Pₜ = Pₕ + Pₒ

101.3 = 56 + Pₒ

Collect like terms

101.3 – 56 = Pₒ

Pₒ = 45.3 KPa

Thus, the pressure of oxygen in the mixture is 45.3 KPa

Answer:

its a chemical property

Explanation:

Answer:

1.3175675675675604

Explanation:

does this need to be rounded?

Answer:

Animals gain energy from the food they eat. Some animals eat plants while others eat other animals. This is passing of energy from the sun to plants to animal to other animals is called a food chain

Answer:

A, B, C

Explanation:

Answer: Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to create oxygen and energy in the form of sugar.

Explanation:

Answer:

carbon dioxide + sun = sugar and o2

Explanation:

During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.

hope that helps have a great day

Answer:

Ocean water contains streamlike movements of water

Answer:

A precipitate will be produced

Explanation:

The Ksp of AgBr is:

AgBr(s) → Ag⁺ + Br⁻

5.0x10⁻¹³ = [Ag⁺] Br⁻]

Where [] are the concentrations in equilibrium of each ion.

And if Q is:

Q = [Ag⁺] Br⁻]

Where the concentrations are actual concentrations of each ion

We can say:

IF Q >= Ksp, a precipitate will be produced

IF Q < Ksp, no precipitate will be produced.

the molar concentrations are:

[AgNO₃] = [Ag⁺] = 0.002M * (50mL / 100mL) = 0.001M

Because 50mL is the volume of the AgNO₃ solution and 100mL the volume of the mixture of both solutions.

[NaBr] = [Br⁻] = 0.002M * (50mL / 100mL) = 0.001M

Q = [0.001M] * [0.001M]

Q = 1x10⁻⁶

As Q > Ksp,