Melatonin has the chemical formula C13H16N2O2. Less than 10 milligrams(0.01g) Convert the melatonin to moles

Answers

Answer 1

Answer: There are 0.000043 moles of melatonin.

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]

given mass = 10 mg = 0.01 g

molar mass of [tex]C_{13}H_{16}N_2O_2[/tex] = 232.28 g

[tex]{\text {moles of melatonin}}=\frac{0.01g}{232.28g/mol}=0.000043moles[/tex]

Thus there are 0.000043 moles of melatonin


Related Questions


If a 28.0 L balloon with a temperature of
25 °C is cooled in a refrigerator, what will
be the volume of the balloon be when it
reaches 5 °C?

Answers

Answer:

5.6 L

Explanation:

We can apply Charles' Law here since our pressure is constant (will not change inside the refrigerator) and we are relating change in volume with change in temperature:

V₁ / T₁ = V₂ / T₂ where V₁ and T₁ are initial volume and temperature, and V₂ and T₂ are final volume and temperature. Let's plug in what we know and solve for the unknown:

28.0 L / 25 °C = V₂ / 5 °C => V₂ = 5.6 L

5.6 L is our new volume (at 5 °C).

Balance the following equation:

[?]Na2SO4(aq) + [?]CaCl2(aq)-> [?]CaSO4(s) + [?]NaCl(aq)


(fill in the [?])

Answers

You only need a 2 at the end In front of the NaCl

What is this name of this compound? Cu2C

Answers

Answer:Copper(I) oxide or cuprous oxide is the inorganic compound with the formula Cu2O. It is one of the principal oxides of copper, the other being or copper (II) oxide or cupric oxide (CuO)

Answer:

copper carbonite

Explanation:

Copper(I) oxide or cuprous oxide is the inorganic compound with the formula Cu2C. It is one of the principal oxides of copper, the other being or copper (II) oxide or cupric oxide (Cu2C).

...

CHEBI:81908 - cuprous oxide.

the formula equation of Sodium carbonate + hydrochloric acid
→ sodium chloride + carbon dioxide + water​

Answers

Answer:

the reaction is: Na2CO3 + 2HCl ===》 2NaCl + H2O + CO2(g)

Help me please dont waste my points

Answers

Answer:

H ( I think , I can't understand the given answers but I hope my explanation helps) ^^

Explanation:

Tectonic plate movement under the Earth can create landforms by pushing up mountains and hills. Erosion by water and wind can wear down land and create landforms like valleys and canyons. Both processes happen over a long period of time, sometimes millions of years.

How many atoms are in 9.6 moles of
aluminum (AI)?

Answers

For this one type into your calculator:
9.6 * (6.02 * 10 ^23)

Slow cooling of magma leads to the formation of large crystals, such as halite and calcite.
Select the correct response:
True
False

Answers

False h they gg be DVD BBC do Ed C rhh h do B try egg cut of C the

Cells need a structure to separate their genetic material from the rest of the cell. This structure is the
cell membrane.
vacuole
cytoplasm
nucleus.

Answers

Answer: Nucleus

Explanation: It is the nucleus because the nulceus holds the chromosomes of the cell.

Pls help me and thank youuuu

Answers

The basic building blocks are atoms
A atoms i pretty sure

Create the Equation: How many grams of Aluminum Chloride would be made from 42.7 L of Chlorine gas at STP reacting with 50.0 g of Aluminum?

Answers

Answer: 169.3 g of [tex]AlCl_3[/tex] will be produced

Explanation:

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]

moles of [tex]Al[/tex]

[tex]\text{Number of moles}=\frac{50.0g}{27g/mol}=1.85moles[/tex]

moles of [tex]Cl_2[/tex]

According to ideal gas equation:

[tex]PV=nRT[/tex]

P = pressure of gas = 1 atm (STP)  

V = Volume of gas = 42.7 L

n = number of moles = ?

R = gas constant =[tex]0.0821Latm/Kmol[/tex]

T =temperature =[tex]273K[/tex]   (at STP)

[tex]n=\frac{PV}{RT}[/tex]

[tex]n=\frac{1atm\times 42.7L}{0.0820 L atm/K mol\times 273K}=1.90moles[/tex]

[tex]2Al+3Cl_2\rightarrow 2AlCl_3[/tex]

According to stoichiometry:

3 moles of [tex]Cl_2[/tex] reacts with = 2 moles of aluminium

Thus 1.90 moles of [tex]Cl_2[/tex]reacts with=  [tex]\frac{2}{3}\times 1.90=1.27[/tex] moles of aluminium  

Thus [tex]Cl_2[/tex] is the limiting reagent as it limits the formation of product.

As 3 moles of [tex]Cl_2[/tex] give =  2 moles of [tex]AlCl_3[/tex]

Thus 1.90 moles of [tex]Cl_2[/tex] give =[tex]\frac{2}{3}\times 1.90=1.27moles[/tex]  of [tex]AlCl_3[/tex]

Mass of [tex]AlCl_3=moles\times {\text {Molar mass}}=1.27moles\times 133.34g/mol=169.3g[/tex]

Thus 169.3 g of [tex]AlCl_3[/tex] will be produced from the given masses of both reactants.

Assume that the variables x and y are directly related. If k = 8, what is the value for each of the following polnts? Be sure
and record your data to be used in the following problem.

Answers

Calculus, originally called infinitesimal calculus or "the calculus of infinitesimals", is the mathematical study of continuous change, in the same way that geometry is the study of shape and algebra is the study of generalizations of arithmetic operations.

Why is methanol written as ch3oh instead of ch4o?​

Answers

Answer: Here comes the role of another formula, which we refer to as the structural formula and that is CH3OH for methanol. The structural formula gives us an additional information that carbon is attached to three hydrogen atoms and one oxygen atom.

What type of friction acts on a person who is sledding down a hill? Neglect air resistance. *
static
sliding
rolling
fluid

Answers

sliding

This is the answer

How many moles of calcium nitrate would react with 4.55 moles of chromium (III) sulfate to produce calcium sulfate and chromium(III) nitrate?

Answers

Answer:

13.65 moles

Explanation:

The equation of the reaction is;

3Ca(NO3)2 + Cr2(SO4)3 = 3Ca(SO4) + 2 Cr(NO3)3

4.55 moles of chromium (iii) sulfate reacts with calcium nitrate

The mole ratio of Chromium (iii) sulfate to calcium nitrate is 1: 3

Therefore; the moles of calcium nitrate will be given by

 = (4.55/ 1)×3

= 13.65 moles

Hence; 13.65 moles of calcium nitrate would react with 4.55 moles of Chromium (iii) sulfate.

Name the salt produced if sodium carbonate reacts with dilute nitric acid ? Write the equation.

Answers

Answer:

2HNO3 +Na2CO3 → CO2 + H2O + 2NaNO3

Answer:

Na2CO3 + 2HNO3 → 2NaNO3 + CO2 + H2O

End product is Sodium Nitrate in solution, plus plenty of carbon dioxide gas bubbles and water.

Brainliest pweasee if I could help you! <3


Why might the ability to produce three-dimensional images of organs be helpful in diagnosing a patient's ailment?

Answers

Answer:

Explanation: The body is largely composed of water molecules. Each water molecule has two hydrogen nuclei or protons. MRI takes advantage of the high prevalence of hydrogen in the body and the magnetic properties of the proton in a hydrogen atom. Hydrogen atoms induce a small magnetic field due to the spin of this atom's proton.

What products do not contain endocrine disruptors

Answers

Answer:

pesticides.

Explanation:

endocrine disruptors are found in many every day products including some plastic bottles and contains liner or metal food

Anyone know the answer to this?

Answers

the answer is 2 i think

Spirited Away..............

Answers

Answer:

I'm not sure what your asking

Explanation:

whats the question......

Answer:

I don't understand you. Please elaborate

NO LINKS⚠️
In a lab, students measured the mass of an unknown metal to be 46.4g The metal sample releases 769 J when it is cooled from 101.0°C to 30.00 "C, the
meal is most likely?

Lead
Copper
Mercury
Silver

Answers

From Q = mcΔΤ, the specific heat capacity, c, of the metal that was cooled is c = Q/mΔT = (-769 J)/(46.4 g)(30.0 °C - 101.0 °C) = 0.233 J/g °C. From the table, it appears that this is the specific heat capacity of silver. So, the metal is most like silver.

Note: The value for Q was written as a negative value in the equation as heat energy was given off by the metal when the metal was cooled (from the metal’s point of view, it’s losing heat energy).

The gills, Y, of a fish are usually near external openings that allow water
to flow in and out of them. They also usually have many folds, which
increases their surface area. Using the diagram and this information, how
have gills most likely allowed fish to adapt to living underwater?
A.
They allow the fish to easily take in dissolved oxygen
B.
They allow the fish to filter food from the water
C.
They allow the fish to filter carbon dioxide out of the water
D.
They allow the fish to sense predators

Answers

soooooo the answer is b

5. What is the chemical difference between acids and bases? (only answer if you know and don’t comment some link)

Answers

Answer:

acid donates protons while base accept protons

Explanation:

What is the volume of 11 moles of N2 at STP?

Answers

i think it is 0.5 miles

2. What element is found in compounds that control all chemical changes in your body?

Answers

Answer:

???????

Explanation:

air hockey is a game that you play on the specially-designed table each player tries to slide a pug cross the table into a go using mileage the table has tiny holes that create cushion of air that lives the focus more distance about the playing surface the cushion of air increases the speed of the puck because it's......mm​

Answers

Answer:

i don't know man really my bad

Answer:The cushion of air increases the speed of play because it lowers the friction between the table and the puck .

Explanation:

What is tugror pressure ,what causes it,and what does it do for a plant?

Answers

Answer:

Explanation:

Turgor pressure is the pressure forced or in other words, exerted onto the cell wall of the plant. It's caused by the movement of water into the cell. This causes the water to rush and burst into the cell, which increases the pressure onto the cell wall. Due to that, cell swells up, which helping the plant to stand upright and straight.

Hope this helps

Answer:

Turgor pressure is the pressure exerted on the cell wall of a plant. It is caused by the movement of water into the cell. ... This causes water to rush into the cell, increasing the pressure on the cell wall. The cell swells up, helping the plant to stand upright.

Write a question you have about Titan or about methane that could help you determine what happened to the lake

Answers

Answer: what would swimming in mathane lake on titan feel like.

Explanation:

Both methane and titan are gases that are combustible in nature.

Those gases which are inflammable are called combustible gases.

For example:-

MethaneEthane

These gases have various uses in daily life. these uses as follows:-

CookingDecompositionUsed as fuel

The gas will mix in the lake which harms the aquatic animals. The aquatic animals have a hard time to breath.

Hence, the lake will be polluted.

For more information, refer to the link:-

https://brainly.com/question/25068613

Which salt is most soluble at 10°C?

Answers

Answer:

KI

Explanation:

Which of these counts as a single electron domain?

(Select ALL answers that apply)


a single bond to an atom


a double bond to an atom


a triple bond to an atom


a lone pair

Answers

Answer:

double bond to an atom

a lone pair

a single bond to an atom

Explanation:

Jordan is making a model of a cell. Where should Jordan place all of the cell's organelles?
A. the nucleus
B. the cytoplasm
C. the cell membrane

Answers

The organelles should be placed in the cytoplasm, B.

Answer:

use b

f3rtynrteagnhgm,./"?;.,khmjgnhfbgv

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