What is an alkene?
A. A hydrocarbon containing all single bonds
B. A hydrocarbon containing a carbon-carbon triple bond
C. A hydrocarbon containing a carbon-carbon double bond
O D. A hydrocarbon containing an aromatic ring


The answer is B. It’s b.

The required amount of silver nitrate to produce 16.2g of silver is 25.48 grams.

Relation between the mass and moles of any substance will be represented as:

n = W/M, where

Moles of silver = 16.2g / 107.8g/mol = 0.15mol

From the stoichiometry of the given reaction it is clear that, same moles of silver nitrate is required to produce same moles of silver. So 0.15 moles of silver nitrate is required.

Mass of silver nitrate = (0.15mol)(169.87g/mol) = 25.48g

Hence required mass of silver nitrate is 25.48g.

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Taking into account the definition of molarity, 4.08 grams of ammonium sulfide are present in 3.00 L of a 0.0200 M solution.

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

[tex]Molarity=\frac{number of moles}{volume}[/tex]

Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].

In this case, you know:

Replacing in the definition of molarity:

[tex]0.0200 \frac{moles}{liter}=\frac{number of moles}{3 L}[/tex]

Solving:

0.0200  [tex]\frac{moles}{liter}[/tex]× 3 L= number of moles

0.06 moles= number of moles

On the other side, the molar mass is the amount of mass that a substance contains in one mole. In this case, the molar mass of ammonium sulfide is 68 g/mole.

Then, the amount of mass contained in 0.06 moles is calculated as:

0.06 moles×[tex]\frac{68 grams}{1 mole}[/tex]= 4.08 grams

Finally, 4.08 grams of ammonium sulfide are present in 3.00 L of a 0.0200 M solution.

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Answer:

4.09 is the correct answer.

Answer:

C 20 L

Explanation:

Apply the formula C1 × V1 = C2 × V2 where, C1 = initial concentration , 12M V1 = initial Volume , ? C2 = Final concentration,0.25M V2 = Final Volume , 1.0L V1 = C2 x V2

There are several things that would happens,if all of the fossil fuels were used.The most important is in bold,but I made a quick list below to note.<3

-War Would Break Out

-The Earth's Climate Would Be Far From Safe & Would Cause A Huge Decrease In Population

-A Huge Portion Of The World Would Be Living In Poverty

-Failing Economies

-A Worthless Planet

-Also want to not that it is almost impossible to run out of fossil fuels, but if we do,it won't be thousands of years in the future.

I HOPE THIS HELPS! & and good luck on your assignment.

According to the diagram, cellular respiration and photosynthesis are the phrases that best summarize the events taking place in Step 2.

It is the way carbon circulates through the atmosphere, the oceans, and the Earth's surface and interior.

Cellular respiration and photosynthesis respectively release and capture carbon dioxide from the atmosphere, as a by-product or input of their biochemical pathways, carbon from CO2 is absorbed by plants and released along with water vapor during animal respiration.

Therefore, we can conclude that according to the diagram, cellular respiration and photosynthesis are the phrases that best summarize the events taking place in Step 2.

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I'd say Photosynthesis and Storing carbon dioxide in living organisms.

But the person above me shows alot more detail than I have.

i guess this is the answer .

Answer: Empirical formula, CH; Molecular formula, C2H2

Explanation:

Answer: It is either through the addition of energy by heat and the transition to a more energetic state or from the removal of energy by heat and the transition to a less energetic state.

Explanation:

Answer:

During phase changes, matter changes from one phase to another one, either through the addition of energy by heat or transmission or the removal of energy with the same process.

Explanation:

Answer:

Explanation:

When an atom gains/loses an electron, the atom becomes charged, and is called an ion. Gaining an electron results in a negative charge, so the atom is an anion. Losing an electron results in a positive charge, so atom ion is a cation.

It means that the 'Atom A' is giving that is, losing the electrons

Answer:

One of the purposes of the Marshall Plan was to aid nations in economic recovery from WWII.

Explanation:

The Marshall Plan aided the defeated Axis powers because that's one of the reasons it was created, The Marshall Plan was supposed to rehabilitate the economies of the 17 western and southern European countries in order to create stable conditions for democracy to continue.

2.05 × 10²³ formula units

Given data:Mass of AgF =  43.15 gNumber of formula units = ?Solution:Number of moles of AgF:Number of moles = mass/ molar massNumber of moles = 43.15 g/ 126.87 g/molNumber of moles = 0.34 molNow Number of formula units will be determine by using Avogadro number.It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.The number 6.022 × 10²³ is called Avogadro number1 mole = 6.022 × 10²³ formula units0.34 mol × 6.022 × 10²³ formula units2.05 × 10²³ formula units

Answer:

A rise in global temperatures increases the severity and likelihood of storms, floods,wildfires, droughts, and heat waves

Explanation:

no explanation please tag me as brainleast thankyou

The amount of maximum mass of ethyl alcohol that could we boil with 1000 J of heat, starting from 20°C is 7.08 grams.

Mass of the ethyl alcohol will be calculated by using the below equation as:

Q = mcΔT, where

On putting all these values, we get

m = 1000 / (2.42)(58.37) = 7.079 = 7.08g

Hence required mass of ethyl alcohol is 7.08grams.

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Answer:

2S02 + O2 ---> 2SO3

Its balanced now as Reactants = Products.

The molarity of an HCl solution if 41.73 mL of HCl reacts with 7.8111 grams of sodium carbonate is 1.77M. Details about molarity can be found below.

The molarity of a solution can be calculated by dividing the number of moles of the substance by its volume.

According to this question, 7.8111 grams of sodium carbonate (106 g/mol) is given. The number of moles of sodium carbonate is calculated as follows:

no of moles = 7.811g ÷ 106g/mol = 0.074mol

Molarity of HCl = 0.074mol ÷ 0.04173L

Molarity of HCl = 1.77M

Therefore, the molarity of an HCl solution if 41.73 mL of HCl reacts with 7.8111 grams of sodium carbonate is 1.77M.

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Answer:

To remedy the stability problem, Bohr modified the Rutherford model by requiring that the electrons move in orbits of fixed size and energy.

Answer:

Energy can exist in many forms within a system and may be converted from one form to another within the constraint of the conservation law. These different forms include gravitational, kinetic, thermal, elastic, electrical, chemical, radiant, nuclear, and mass energy.

Explanation:

For the neutralization reaction involving HNO₃ and Ca(OH)₂, liters of 1.55 M HNO₃ are needed to react with 45.8 ml of a 4.66 m Ca(OH)₂ solution is 0.270 L.

Those reactions in which acids and bases will combine with each other for the formation of water molecule and salt, is known as neutralization reaction.

Given chemical reaction is:

2HNO₃ + Ca(OH)₂ → 2H₂O + Ca(NO₃)₂

Moles (n) of Ca(OH)₂ will be calculated by using the below formula:
M = n/V, where

M = molarity = 4.66M

V = volume = 45.8 mL = 0.045 L

n = (4.66)(0.045) = 0.2097 mol

From the stoichiometry of the reaction,

1 mole of Ca(OH)₂ = reacts with 2 moles of HNO₃

0.2097 mole of Ca(OH)₂ = reacts with 2×0.2097=0.419 moles of HNO₃

Again by using the molarity equation volume will be calculated for HNO₃ as:

V = (0.419) / (1.55) = 0.270 L

Hence required volume of HNO₃ is 0.270 L.

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The balanced symbol equation for Solid potassium fluorine gas → solid potassium fluoride is 2 K + F₂ → 2 KF ⁻.

The reactants are on the left side of the arrow in a balanced equation, while the products are on the right.

The moles in a compound are indicated by the number in front of the chemical formula. Subscripts indicate the number of atoms in a single molecule (numbers below an atom).

Thus, the balanced equation is 2 K + F₂ → 2 KF ⁻.

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The IUPAC name of the compound is propanal and acetone.

Propanal is also called propanaldehyde, and it is an aldehyde which has one double bond and oxygen.

Acetone is a ketone. Ketones have functional group of R2CO.

Thus, the IUPAC name of the compound is propanal and acetone.

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Ionization energy refers to the amount of energy needed to remove an electron from an atom. Ionization energy decreases as we go down a group. Ionization energy increases from left to right across the periodic table.

Ionization is the process by which ions are formed by the gain or loss of an electron from an atom or molecule.

Ionization energy is defined as the energy required to remove the most loosely bound electron from a neutral gaseous atom.

When we move across a period from left to right then there occurs a decrease in atomic size of the atoms. Therefore, ionization energy increases along a period but decreases along a group.

Smaller is the size of an atom more will be the force of attraction between its protons and electrons. Hence, more amount of energy is required to remove an electron.

Thus, we can conclude that the energy required to remove an electron from a gaseous atom is called ionization energy.

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Answer:

D

Explanation:

2-bromopropanoic acid is optically active because it contains chiral carbon bonded with 4 different atom ( CH3,H,COOH,Br).

Answer:

Hydrogen

Explanation:

These are what hydrogen isotopes look like

One of the flaws of this solution is that because it is programmed at night data loss is possible if a failure occurs at this time.

This is used to save important information or date from a device such as a computer periodically.

Tape cardridge backup is the best option if a lot of data has to be saved because they are efficient and low cost.

The only problem is that because the back up is automatically programmed at night, a failure such as a problem in electricity implies valuable data might be lost.

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Answer:

Burning, cooking, rusting, and rotting