I need help please help

Answer: There are 31.8 grams of copper.

Explanation:

The phosphorus atom in Phosphorus trichloride (PCl₃) would be expected to have a partial positive charge.

A molecule has a partial positive charge when it presents differences in electric charges along the molecule.

A molecule that has a partial positive charge is said to be polar because can generate polar bonds.

Moreover, phosphorus trichloride (PCl₃) is a molecule that forms a colorless substance used in the inorganic chemistry industry.

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Base is used in aldol condensation reaction

because it is an organic reaction to form enolate ion, the OH bond present in base help to remove Acidic hydrogen of enolate ion.

Answer:

B. a military unit

Explanation:

The acid/base pair that give equivalence point that Cannot be predicted by general knowledge is NaOH and HCI ONH.

An Acid is a substances that is corrosive in nature and turn blue lithmus paper to red which it react with base to produce salt and water.

Acid dissolve metals.

Base is a substance that turn red lihthmus paper to blue and react with acid to produce salt and water.

Therefore, The acid/base pair that give equivalence point that Cannot be predicted by general knowledge is NaOH and HCI ONH.

The question is incomplete as the options were not given. The options were gotten from another website.

Select the correct answer below:

ONaOH and HCI ONH,

HC ONH, and CH, COOH

NaOH and Christmas, COOH

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The values of molarity and volumes for the given questions are  2,100 mL, 0.75 M, 0.1 M, 50,000 mL, 2.07 M and 1,200 mL respectively.

Relation between the molarity and volume of the solution will be shown by the following equation:
M₁V₁ = M₂V₂, where

M₁ & V₁ is the molarity and volume of one solution whereas M₂ & V₂ are the molarities and volume of the another solution.

V₂ = (750)(2.8) / (1) = 2,100 mL

M₂ = (0.15)(125) / (25) = 0.75 M

M₂ = (100)(0.15) / (150) = 0.1 M

V₂ = (10)(250) / (0.05) = 50,000 mL

M₂ = (1.5)(345) / (250) = 2.07 M

V₂ = (2.4)(500) / (1) = 1,200 mL

Hence required values of molarity and volume are 2,100 mL, 0.75 M, 0.1 M, 50,000 mL, 2.07 M and 1,200 mL respectively.

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Molar mass of SmO or sodium methylate is 160g/mol

Now

Given mass

Energy levels are the electron shells where electrons are found at a fixed distance from the nucleus of the atom. The atom could emit 6 different wavelengths.

A wavelength is a distance between the adjacent crests in wave signals propagated in a system. Wavelength [tex](\rm \lambda )[/tex] is in inverse relation to the frequency of the wave.

When an electron jumps from energy level 1 to 2, 1 to 3, and 1 to 4 one wavelength each is present. Hence, making the total wavelength to be 3, in transition from the first energy level.

Similarly, from energy levels, 2 to 3 and 2 to 4, a total of 2 wavelengths, and from energy levels 3 to 4 one wavelength is produced.

So the total different wavelengths of the radiation that can be emitted will be 3 + 2 + 1 = 6.

Therefore, 6 different wavelengths of radiation will be emitted by the atom.

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Answer:

black hole in ourter space for the first time the scientific research

and development of the following layers lethargic

Explanation:

STUDY CORRECTION.

Answer:

8.0 mol/L

Explanation:

To do this problem you need to use C₁V₁=C₂V₂. C=concentration and V=volume. (Note: you dont want to use M₁V₁=M₂V₂ because this is measuring mass not concentration).

So, V₁= 1.0L

C₂=2 Mol/L

V₂= 4 L

C₁ is unknown.

you would plug this equation in like this:

(C₁)(1.0 L)=(2.0 Mol/L)(4.0L).

Do algebra to get C₁ alone.

C₁=[tex]\frac{(2.0 mol/L)(4.0L)}{1.0L} =8.0 mol/L[/tex]

The liters cancel out and you are left with mol/L or M

I hope this helps! good luck :)

The compounds will yield Positive results for the permanganate, ninhydrin, and ceric ammonium nitrate tests  are

permanganate test= ethene,

ninhydrin=aspasyic acid Phenylalanine

ceric ammonium nitrate test= methanol

Generally, A compound is simply defined as a substance made up of two or more different chemical elements held together by chemical bonds that are difficult to break.

In conclusion, For the permanganate test= ethene,

ninhydrin=aspasyic acid Phenylalanine

ceric ammonium nitrate test= methanol

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Answer:

True.

Explanation:

Ternary acids end in -ic if the polyatomic anion ends in -ate.

Answer: Decrease

"Carbon dioxide reacts with seawater to form carbonic acid, which releases hydrogen ions, reducing pH"

Sourced from https://yaleclimateconnections.org/2008/06/covering-ocean-acidification-chemistry-and-considerations/

So basically the ocean is absorbing the CO32- and that lowers the pH as well lowers the amount of CO32- readily available.

This is all I could find on this subject though ;'(

Answer: The atomic symbol represent an isotope that undergoes radioactive decay to produce Pb-206 can be, Polonium (Po).

Answer:

c. 800 K, 0.1 atm

Explanation:

Good luck in AP Chem

Answer:

14.625 gm

Explanation:

(x / 58.5 gm) / (500ml /1000 ml) = .5         x = 14.625 gm

If we increase the concentrations of a weak acid and its conjugate base by the amounts shown,  the buffer capacity will remain the same.

The term buffer capacity is generally used to describe how much of the acid or base that can be neutralized by a buffer before there can be a change in the pH.

In this case, if we increase the concentrations of a weak acid and its conjugate base by the amounts shown,  the buffer capacity will remain the same.

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Answer:

Explanation:

1) For every 2 moles of methane consumed, 8 moles of carbon dioxide are produced. This means that if 4 moles of methane are consumed, the reaction can occur twice, meaning 8(2)=16 moles of carbon dioxide will be produced.

2) For every 2 moles of methane consumed, 10 moles of water are produced. This means that the reaction can occur twice, and hence 10(2)=20 moles of water will be produced.

3) For every 10 moles of water produced, 13 moles of oxygen gas are consumed. This means that if we want 126 moles of water, we need the reaction to occur 12.6 times, and thus 13(12.6)=163.8 moles of oxygen gas will be consumed.

Answer:

The answer is 2939 moles.

Explanation:

To obtain the moles from these values you should apply the ideal gas formula because in a scuba tank all gas that you have inside is the air:

PV= nRT. (1)

Thus the moles number, n, is:

n = PV/ RT (2)

Where:

P is pressure: 195 atm;

V is volume: 350 L,

R is gas constant: 0,082 atm×L / mol×K

And T is temperature: 10°C, that must be converted in k, thus:

10°C + 273,15 = 283,15 K

Replacing these values in (2) the moles number, n, is:

2939 moles of air

Answer:

Negative feedback caused his pancreas to stop secreting insulin.

Explanation:

i took the test its correct

Answer:

roughly about 246.1?

Explanation:

At constant temperature, if the volume of the sample of gas increases to the given value, the pressure decreases to 0.92atm.

Boyle's law simply states that "the volume of any given quantity of gas is inversely proportional to its pressure as long as temperature remains constant.

Boyle's law is expressed as;

P₁V₁ = P₂V₂

Where P₁ is Initial Pressure, V₁ is Initial volume, P₂ is Final Pressure and V₂ is Final volume.

Given the data in the question question;

We substitute our given values into the expression above to determine the new pressure.

P₁V₁ = P₂V₂

P₂ = P₁V₁ / V₂

P₂ = ( 1.53atm × 0.03L ) / 0.0501L

P₂ = 0.0459Latm / 0.0501L

P₂ = 0.92atm

Therefore, at constant temperature, if the volume of the sample of gas increases to the given value, the pressure decreases to 0.92atm.

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Answer:

See below

Explanation:

From the equation you can see 5  mole O2   results in   3 moles CO2

( this is the limiting reagent because   C3H8 : O2  is   1:5)

6.2 / 5   *  3  = 3.72 moles CO2 produced

CO2 weighs ~ 44 gm/mole      44 gm/mole * 3.72 mole = 163.68 gm of CO2  

Answer:is A.

Explanation:Because six carbon straight chain aldehyde it is clear liquid with an atomspheric pressure boiling point of 131 degree Celsius.

Molarity is the ratio of the moles and the volume of the solution in liters. The molarity of the 0.2 mole salt is 0.1 M.

The molarity of the solution is the molar concentration of the moles of the solute dissolved in a liter of solution. It is given as,

[tex]\rm Molarity (M) = \rm \dfrac{\text{moles of solute (n)}}{\text{volume (V) in liters}}[/tex]

Given,

Moles (n) of the salt = 0.2 mol

The volume of the solution (V) = 2 L

Substituting values in the above equation:

[tex]\begin{aligned} \rm M &= \dfrac{0.2}{2}\\\\&= 0.1 \;\rm M\end{aligned}[/tex]

Therefore, 0.1 M is the molarity of the sample.

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The moles of water are produced from the given reaction, when 275 kJ of energy is given off is 1.08 moles.

The mole (symbol mol) is the SI base unit of material quantity. The amount of substance in an object or sample is a measure of how many elementary entities of a certain substance are present.
Given chemical reaction is:

4NH₃ + 3O₂ → 2N₂ + 6H₂O

From the stoichiometry of the reaction it is clear that 6 moles of water molecule is produced.

Actual moles will be calculated by using the enthalpy and energy value as:

Actual moles of H₂O = 275kJ × (6 mol H₂O)/1530kJ) = 1.08 moles.

Hence required moles of H₂O is 1.08 moles.

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Answer:

A box of ideal gas has consists of light particles and heavy particles (the heavy ones have 16 times the mass of the light ones).

The two factors must be considered when predicting whether two substances will dissolve in each other are type of bonds and size of the molecules are two factors.

Solubility is the ability of solute particles to dissolve in any solvent, and solubility is directly proportional to the dissolving ability of the solute.

Solubility of any substance depends on the type of the bond present in the solute molecule i.e. polar or non polar. And it is also depends on the size of the solute as size defines the surface tenssion of the substance.

Hence type of bonds and size of the molecules are two factors.

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Answer:

0.5 M

Explanation:

To find the concentration, you take the moles and divide that by the liters;

[tex]\frac{moles}{liters} =\frac{25 moles}{50 L} =0.5M[/tex]

I hope this helps!

Answer:

plaster is important because of the many uses you can make out of plaster