Using standard thermodynamic data at 298k, calculate the free energy change when 2. 34 moles of nh3(g) react at standard conditions

Answer:

Single replacement is a reaction in which one element reacts with another compund to form another compound and another element.

planation:

If the reaction is double displacement then two molecules will be displaced and if it is single displacement reaction then only one element displaces.

Displacement reactions are those reactions in which any element of the given reactant will be displaced by any another element.

If only one element from the reactant molecules will displace then it will be known as single displacement reaction. If two elements or atoms will be displaced from the reactant molecules then it will be known as double displacement reaction.

Hence if one element displaceed then called the single displacement reaction and if two elements displaces then called as the double displacement reaction.

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Answer:

a grassy meadow

Explanation:

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duh

A 120g block of pinewood has a volume of 300cm3. Would this block float on water? (HINT: Water has a density of 1g/cm3). a. No, because the block is denser than water.

Also here's a free meme

The density of a material represents the denseness of that material in a specific given area. If an object has a density less than water then it will float on water otherwise it will sink. Here the wood will float on water.

The density of a material denotes the measurement which compares the amount of matter an object has to its volume. An object with more matter in a certain volume has a high density. It is defined as the mass per unit volume.

The density is usually represented by symbol ρ or by the letter D. The formula used to calculate the density is:

Density = Mass / Volume

D = 100 / 300 = 0.33 g/cm³

Here the density of water is 1.0 g/cm³ which is greater than the density of  pine wood. So the pine wood will float on water.

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Answer:

Pb(NO

3

)

2

+

2

KI

→

PbI

2

+

2

KNO

3

Explanation:

For all the reactions listed, the moles of products and limiting reactants are;

1. Molar cofficient - 6, oxygen is the limiting reactant

2. Molar coefficient - 8 chlorine is the limiting reactant

3. Molar coefficient - 4 and CO2 is the limiting reactant

A chemical reaction is a combination of reactants that yields products. Recall that the limiting reactant is the reactant that nis present in the least amount.

Let us now complete each reaction;

1. The molar coefficient of the product in reaction 1 is 6 and oxygen is the limiting reactant

2. The molar For all the reactions listed coefficent of the product in reaction 2 is 8 and chlorine is the limiting reactant

3. The molar coefficient of the product in reaction 3 is 4 and the limiting reactant is CO2.

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The mass of nickel, Ni deposited when 0.2 faraday of electrical charge is passed through a solution of NiSO₄ is 5.9 g

Ni²⁺ + 2e —> Ni

Molar mass of Ni = 59 g/mol

Mass of Ni from the balanced equation = 1 × 59 = 59 g

Number of faraday = 2

SUMMARY

From the balanced equation above,

2 faraday deposited 59 g of Nickel

From the balanced equation above,

2 faraday deposited 59 g of Nickel

Therefore,

0.2 faraday will deposit = (0.2 × 59) / 2 = 5.9 g of Nickel

Thus, 5.9 g of Nickel were deposited in the process

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Answer:

5.9 grams

Explanation:

You need 2 faraday to deposit 1 mole of Ni (59 grams) because there are 2 moles of electrons in equation:

Ni+2 + 2e- --> Ni(s)

So, 0.2 faraday will deposit 1/10 of that or 5.9 grams of Ni(s).

Answer:

Well, if you live on a farm, you have to feed the living animals and when you eat, you use a fork, knife, napkin, chair and those are all nonliving.

Explanation:

Also, if your trying to go on a scavanger hunt, and you pick up an animal then you are  interacting with a living resource. Also water can be counted as both because water isnt alive but it can be used on living things. like if you were to drink it or water the plants.

Answer:

I use plant and dog as living things and mobile and dish as non living things everyday.

Explanation:

I use plants to get oxygen, vegetables and herbs and dog to help me to protect my home everyday. similarly, I use mobile to call others and I use dish to eat food everyday.

Answer: 373 mL

Explanation:

Since there is no change in pressure, the formula: V / T = V / T can be used.

However, you must first convert the temperatures to Kelvin by adding 273 to them:

(19 + 273) = 292K and (90 + 273) = 363K.

Now, plug in: V / 292 = 464 / 363 → V = 373 mL :)

The pH of a 0.50M solution of malic acid with ka1 = 4. 0 × 10-⁴ and ka2 = 6. 3 × 10-⁶ as described is; 1.85.

Since, in a polyprotic acid the first hydrogen will dissociate faster than the others, If the Ka values differ by a factor of 10-³ or more, it is possible to approximately calculate the pH by using only the Ka of the first hydrogen ion.

However, the situation is different in this scenario.

On this note, the solution is as in the attached image.

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The pH of a 0.50 m solution of malic acid is 1.85.

pH is potential hydrogen. It is the measurement of the acidity and basicity of any solution.

The ka1 = 4. 0 × 10⁻⁴

The  ka2 = 6. 3 × 10⁻⁶

The solution is 0.50 m.

First calculate the ka value

[tex]ka = \dfrac{x^2}{0.50} \\\\x^2 = 0.50 \times 4 \times 10^-^4\\\\x^2 = 2 \times 10^-^4\\x^2 = \sqrt{2 \times 10^-^4} \\\\ x = [H^+] = 1.41 \times 10^-^2[/tex]

Now, calculate the pH

[tex]pH = -log [H^+]\\\\pH = -log[ 1.41 \times 10^-2]\\\\pH = 1.85[/tex]

Thus, the pH of a 0.50 m solution of malic acid is 1.85.

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Answer:

Animals also contribute to mechanical weathering. Digging animals such as moles break apart rocks underground, while the movement of animals on surface rock can scratch the rock's surface or exert pressure that causes the rock to crack.

Explanation:

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Here is a Answer to your question:

Air pollution is caused by solid and liquid particles and certain gases that are suspended in the air. These particles and gases can come from car and truck exhaust, factories, dust, pollen, mold spores, volcanoes and wildfires. The solid and liquid particles suspended in our air are called aerosols.

Here are the 8 causes of air pollution?

1: The Burning of Fossil Fuels

2: Industrial Emission

3: Indoor Air Pollution

4: Wildfires

5: Microbial Decaying Process

6: Transportation

7: Open Burning of Garbage Waste

8: Construction and Demolition

I am sorry if this was not helpful

Hope this was helpful

To calculate the molar volume of a gas at STP you can use the ideal gas law equation,

PV=nRT

Regardless of what ideal gas you use, the molar volume at STP will be identical across the board, since you'll be using 1 mole in the ideal gas law equation regardless of what gas you're dealing with.

That is why the volume occupied by 1 mole of any ideal gas will be equal to 22.7 L at STP.

22.4L = 1 mol

38.0L = ?

= 38/22.4

=1.6964285714 Moles

Answer:

C LiOH

Explanation:

because it is an hydroxide as well as it is alkaline

Answer:

C. LiOH

Explanation:

LiOH is a strong base while the others are acids

Answer:

0.01134kg

Explanation:

You divide by 1000 to get the kg

Fuel shortages in the 1980s started the interest in fuel efficiency  best describes a society’s desire for fuel-efficient vehicles because of Iran- Iraq war.

The Iran-Iraq War in 1980 is the main cause of shortage of oil production. Iraq's and Iran's oil production dropped significantly which triggering economic recessions worldwide.

So that's why society’s desire for fuel-efficient vehicles in order to reduce consumption as well as reduce pollution.

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D. Water

Answer:

Explanation:

Nitric Acid (HN03)

Zn(OH)2 + 2HNO3 ==> Zn(NO3)2 + 2HOH

Answer:

Answer one:
Solute particles block some of the ability of liquid particles to evaporate. We can then conclude, solutions of solid solutes typically have a lower vapor pressure than pure solvents.

Answer two:
Solutions freezing points are lower than of the pure solvent or solute because freezing (becoming a solid) creates order and decreases entropy.

Answer three:
The presence of solute particles decreases the vapor pressure of the liquid solvent, this means a higher temperature is needed to reach the boiling point.

Explanation:

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Answer: b. population will decrease

Explanation:

since earth only has a finite amount of resources, it could only support a set amount of people. once these sources can no longer be used, the population will decrease because resources can no longer support the population.

Answer:

Fiddlehead

Explanation:

Young fronds are called Fiddleheads

because of how they are coiled

Answer:

Fiddleheads or koru

Explanation:

The coiled, immature leaves are called fiddleheads. Young fronds, called fiddleheads because of their striking resemblance to the head of a violin, start out tightly curled at the base of the root. New, or young fronds are produced from the rhizome. They are tightly coiled into a spiral (called a fiddlehead or koru), and these slowly uncoil as they mature.

Answer:

Lithium has high melting and boiling point due to its small size, due to which it possesses high ionisation energy. As a result the binding energy in its crystal lattice is very high. This is why lithium has high melting and boiling point.

Explanation:

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Answer:

b. nuclear fuel has a higher energy density than fossil fuels.

Explanation:

Nuclear fuel is a quantity of energy measured in joules; therefore, it has the same units as electrical and mechanical energy.

The value of Avogadro's number was obtained by dividing the charge of a mole of electrons by the charge of a single electron which is equal to 6.02214154 x 1023 particles per mole.

The most common used way is

There can be another derived way

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The salt and water are a homogeneous mixture but when salt dissolves in the water system is called a solution of salt and water.

A mixture is defined as the combination of two or more substances that are not chemically bonded together.

There are two types of mixture which include:

When salt is added to the ice water system, it lowers the freezing point of the ice water thereby forming a homogenous mixture of water and salt.

The dissolution of salt in ice water leads to the formation of salt and water solution.

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Answer:

Measure so that the line you are reading is even with the center of the meniscus. For water and most liquids, this is the bottom of the meniscus. For mercury, take the measurement from the top of the meniscus. In either case, you are measuring based on the center of the meniscus.

Explanation:

Answer:

The enthalpy of vaporization of a given substance is much greater than its enthalpy of fusion because it takes more energy to completely separate molecules (c

Isotopes are only formed in laboratories and is denoted as option D.

This refers to an element which has the same atomic number but different mass number due to difference in number of neutrons.

They are also usually formed in laboratories through series of chemical reactions.

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