Look at the picture to answer

Answer:

1.40 M [OH⁻]

Explanation:

This compound dissociates into 3 ions, but since we are asked about [OH⁻], it's only 2. Therefore, multiply the molarity of the solution by the number of ions that [OH⁻] dissociates into:

2 × 0.70 M = 1.40 M

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Answer:

Hydrocarbons

Hydrocarbons are chemical compounds that contain the elements carbon and hydrogen only. They are compounds that are obtained from the fossil fuel crude oil by a process called fractional distillation.

Fractional distillation

Fractional distillation separates the crude oil mixture into a number of smaller, different parts called fractions. The fractionating column is hot at the bottom and cool at the top. Substances with high boiling points condense at the bottom and substances with lower boiling points condense on the way to the top.

The crude oil is evaporated and its vapours condense at different temperatures in the fractionating column. Each fraction contains hydrocarbon molecules with a similar number of carbon atoms, smaller molecules nearer the top and longer molecules nearer the base of the column.

Oil fractions

The diagram below summarises the main fractions from crude oil and their uses and the trends in properties. Note that the gases leave at the top of the column, the liquids condense in the middle and the solids stay at the bottom.

Explanation:

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The substances which are generally used to generate heat and light energy on burning are called fuels. The diesel fuel contains the largest molecules. Thus option A is correct.

The diesel fuel which is also called the diesel oil is found to be a combustible liquid and it is produced from the fractions of crude oil. The diesel fuel is found to be less volatile than the gasoline.

The chemical composition of a diesel fuel is usually denoted as C₁₂H₂₄. Apart from the carbon and hydrogen atoms small amounts of 'S', 'N' and 'O' are also present in the diesel.

Here gasoline is a derivative product obtained by the fractional distillation of crude oil and it is generally used in passenger vehicles whereas kerosene is a highly flammable liquid obtained from the distillation of petrol and is less volatile than gasoline.

The gasoline contains only 4 to 12 'C' atoms per molecule and it is a lightweight hydrocarbon mixture. The number of 'C' atoms in kerosene ranges from 10 to 16 per molecule and the diesel fuel is known as the heavyweight hydrocarbon mixture with 8 to 21 'C' atoms per molecule.

Thus diesel fuel consists of larger hydrocarbon molecules than gasoline and kerosene.

Thus the correct option is A - Diesel.

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Answer:

13.25 M

Explanation:

Molarity is moles over liters so simply plug your values in as such:

5.30 mol ÷ 0.400 L = 13.25 M

Answer:

Combination reaction is taken during this reaction

Answer:

A. L•atm/mol K

Explanation:

The ideal gas law equation is given as follows:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant

T = temperature (K)

As rightly stated in this question, R is the ideal gas constant, which can be different depending on the unit of the other components.

At STP;

V = 22.4L

P = 1 atm

T = 273 K

n = 1 mole

Hence, using PV = nRT

R = PV/nT

R = 1 × 22.4/1 × 273

R = 22.4/273

R = 0.08205

Approximately, R = 0.0821

With the units of P as atm, V as L, n as mol and T as K; R will be 0.0821 L•atm/mol K

Answer:

what language do you speak?

Answer:

Gay-Lussac's Law

Explanation:

The pressure is directly proportional to the absolute temperature under constant volume. This states the Gay-Lussac's law. The equation is:

P1T2 = P2T1

Where P is pressure and T absolute temperature of 1, initial state and 2, final state of the gas.

That means the right option is:

- Gay-Lussac's Law

Answer:

Zinc oxide is  used in the manufacture of  many products such as paints, rubber, cosmetics, pharmaceuticals, plastics, inks, soaps, batteries, textiles and electrical equipment.

Explanation:

Answer:

No, it is not.

Explanation:

Oil is a non-renewable source of energy. ... Burning oil can pollute the air. Much of our oil has to be imported and it is becoming more and more expensive as reserves reduce and imports increase. Producing electricity from crude oil is expensive compared to other fossil fuels such as coal or gas.

*You Can put this in your own words

Answer:

I think the answer is b

Explanation:

I hope this helps

Answer:

Explanation:

The answer is 202

Answer:

–253.5 °C

Explanation:

We'll begin by calculating the number of mole in 6 g of CO₂. This can be obtained as follow:

Molar mass of CO₂ = 12 + (2×16)

= 12 + 32

= 44 g/mol

Mass of CO₂ = 6 g

Mole of CO₂ =.?

Mole = mass / molar mass

Mole of CO₂ = 6 / 44

Mole of CO₂ = 0.136 mole

Next, we shall convert 225 mL to L.

1000 mL = 1 L

Therefore,

225 mL = 225 mL × 1 L / 1000

225 mL = 0.225 L

Next, we shall determine the temperature of the gas. This can be obtained as follow:

Pressure (P) = 0.855 atm

Volume (V) = 0.225 L

Number of mole (n) = 0.136 mole

Gas constant (R) = 0.0821 atm.L/Kmol

Temperature (T) =?

PV =nRT

0.855 × 0.255 = 0.136 × 0.0821 × T

0.218025 = 0.0111656 × T

Divide both side by 0.0111656

T = 0.218025 / 0.0111656

T = 19.5 K

Finally, we shall convert 19.5 K to degree celsius (°C). This can be obtained as follow:

T(°C) = T(K) – 273

T(K) = 19.5 K

T(°C) = 19.5 – 273

T(°C) = –253.5 °C

Therefore, the temperature of the gas is –253.5 °C

Answer:

the 6 stands for the atomic number

the 12.01 stands for the atomic mass

Answer:

Change Coefficients

Thank you

Answer:

side to side?

Explanation:

The given reaction is a combination / synthesis reaction, since two reactants combine to form a single product

Answer:

0.897 J/g.⁰C

Explanation:

Given the following data:

m = 170 g (mass)

ΔT = 20.0⁰C (change in temperature)

q = 3050 J (amount of heat)

The amount of heat (q) is calculated as follows:

q = m x Cp x ΔT

Thus, we introduce the data in the mathematical expression to calculate the specific heat (Cp):

Cp = q/(m x ΔT) = 3050 J/(170 g x 20.0⁰C) = 0.897 J/g.⁰C

Answer:

So the total mass is 50 plus 150 grams the heat capacity 4.18 joules per gram per degree C. And the temperature change is 36 minus 25 and so we can calculate Delta H for the reaction that takes place.

Explanation:

i thank its B my big brother helped me we thank its b

Answer:

691.7 mmHg is the resulting pressure

Explanation:

Tha Gay-Lussac's law states that the pressure of a gas is directly proportional to its absolute temperature under constant volume. The equation is:

P1T2 = P2T1

Where P is pressure and T asbolute temperature of 1, initial state and 2, final state of the gas.

Computing the values of the problem:

T1 = 273 + 25 = 298K

P1 = 755.0mmHg

T2 = 273 + 0 = 273K

P2 = ?

755.0mmHg*273K = P2*298K

Answer:

Surface mining (also known as "strip mining") has the potential to significantly erode soil fertility, pollute waters, deplete underground water sources, scar or altar the landscape, damage roads, houses, and other buildings, and kill wildlife.

Answer:

option A,B and C.

are the options I chose.

The electrical devices include those that are needed to power appliances and those that are used in daily life. In order to make things operational, they need power or energy.

Hence the option C is correct.

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Answer: It is important to wash it becasue that way you can disinfect the cut and protect the cut from any infections.

Answer:

This will reduce the risk of infection and help stop the bleeding. It gets rid of the bacteria that may have been there. But, it is very important to disinfect it and clean it properly after the bleeding stops.

Answer:

It would be half an half because it depends on the plant and location

Explanation:

It would be half an half because it depends on the plant and location.

The kingdom Plantae contains eukaryotes that are mostly photosynthetic.

Algae and fungi were once included in the plant kingdom, which historically included all living creatures that were not animals; however, all modern definitions of Plantae omit these organisms along with some algae and prokaryotes (the archaea and bacteria).

Green algae and Embryophyta are included in the concept of plants as belonging to the clade Viridiplantae (Latin for "green plants"), which is sister to the Glaucophyta (land plants).

Therefore, It would be half an half because it depends on the plant and location.

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Answer:

Average atomic mass = f1M1 + f2M2 +… + fnMn where f is the fraction representing the natural abundance of the isotope and M is the mass number (weight) of the isotope. The average atomic mass of an element can be found on the periodic table, typically under the elemental symbol.

Answer:

4) C

6) true

I am not sure about 5th one

4) evaporation rate  

5) acetone

6) true

Answer:

triangles

Explanation: