Now that you have exercised, walked your
jackalope, made cookies, and had juice, you
decide on a nap. Your body uses melatonin to
tell your brain and body that it's ready to sleep
or nap. Melatonin has the chemical formula
C13H16N2O2. The amount in your body at any
time is very small - less than 10 milligrams
(0.01 g)! Convert the melatonin to moles so
you can rest

Answers

Answer 1

Answer: The moles of melatonin are 0.000043

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass 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 of melatonin = 0.01 g

Molar mass of melatonin [tex](C_{13}H_{16}N_2O_2)[/tex] = 232.28 g/mol

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

Thus the moles of melatonin in 0.01 g are 0.000043


Related Questions

differentiate between a promoter and an inhibitor​

Answers

Promoters are substances that increase the catalytic activity, even though they are not catalysts by themselves.

Inhibitors are sometimes referred to as "negative catalysts" since they decrease the reaction rate.

Calculate the pOH of a 7.68x10-7 M HCl solution.


pOH = (round to 3 sig figs)

Answers

Answer:

pOH = 7.89

Explanation:

As HCl is a strong acid, [H⁺] is equal to the original acid concentration. In other words:

[H⁺] = 7.68x10⁻⁷ M

Knowing [H⁺], we calculate the pH of the solution:

pH = -log[H⁺]pH = 6.11

With the pH, we can calculate the pOH of the solution, using the following formula:

pOH = 14 - pHpOH = 7.89

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

Answers

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

differentiate between homogenous and heterogeneous catalysis​

Answers

Explanation:

Homogeneous catalysts are those that occupy the same phase as the reaction mixture (typically liquid or gas), while heterogeneous catalysts occupy a different phase. Generally, heterogeneous catalysts are solid compounds that are added to liquid or gas reaction mixtures.

PLEASE SOMEONE HELP dont mind the answers in there already

Answers

Answer:

4. Daughter nuclide

5. Fusion

6. Strong nuclear force

Explanation:

4. When an atom of an element decays to a new element, the new element is called the

In a radioactive decay in nuclear physics, the product of the decay which is usually smaller (loss in mass) than its source and may or may not be radioactive is the daughter nuclide. Its source is the parent nuclide

5. Nuclear fusion is the nuclear process that involves the combination of two or more (light) atoms to produce subatomic particles and one or more atomic nucleus accompanied by an emission or absorption of energy due to the difference between the weight of the reactants and the weight of the products

The given reaction, is presented as follows;

³₂He + ¹₁H → ⁴₂He + ⁰₁e

Therefore, given that two atoms, (³₂He and ¹₁H) combine to form one atom (⁴₂He) and a subatomic electron particle (⁰₁e), the reaction is a fusion reaction

6. What keeps a nucleus together

The nucleus is made of neutrons and protons. There is an attractive nuclear force between protons and neutrons and a repulsive electromagnetic force between two or more protons. However, due to the proximity of the of the neutrons and the protons, which are together known as the nucleons, the attractive nuclear force is stronger than the electromagnetic force pushing the protons away from each other and the nucleus is kept together

Therefore, the strong nuclear force keeps the nucleus together.

How would you expect the reaction profile of an endothermic reaction to look?

a. The reactants have more energy than the products.
b. The products have more energy than the reactants.
c. There is no activation energy.
d. The reactants and the products have the same energy.

Answers

Answer:

B. the products have more energy than the reactants.

It’s :B for those people that think it’s a

All you need to know about CO2?

Answers

Answer:

Carbon is an element that's found all over the world and in every living thing. Oxygen is another element that's in the air we breathe. When carbon and oxygen bond together, they form a colorless, odorless gas called carbon dioxide, which is a heat-trapping greenhouse gas. Whenever we burn fossil fuels such as coal, oil, and natural gas—whether it's to drive our cars, use electricity, or make products—we are producing carbon dioxide.

The atmosphere isn't the only part of the Earth that has carbon. The oceans store large amounts of carbon, and so do plants, soil, and deposits of coal, oil, and natural gas deep underground. Carbon naturally moves from one part of the Earth to another through the carbon cycle. But right now, by burning fossil fuels, people are adding carbon to the atmosphere (in the form of carbon dioxide) faster than natural processes can remove it. That's why the amount of carbon dioxide in the atmosphere is increasing, which is causing global climate change.

Explanation:

Metamorphic rock usually forms

Answers

Answer:

Metamorphic rocks form sedimets

structure of periodic table explain​

Answers

Explanation:

Elements are arranged from left to right and top to bottom in order of increasing atomic number. ... The number of electrons in a period increases as one moves down the periodic table; therefore, as the energy level of the atom increases, the number of energy sub-levels per energy level increases.

What is an Ore? ufhfjfnf​

Answers

Answer:

ore is naturally occuring solid material from which a metal or valuable mineral can be extracted

profitably.

How many grams of Ca metal are produced by the electrolysis of molten CaBr2 using a current of 30.0 amp for
5.50 hours?

Answers

Answer: 123 g

Explanation: Q =It = nzF. For Ca^2+ z= 2, t = 5.5 x 3600 s and I = 30.0

And F= 96485 As/mol

Amount of moles is n = It /zF = 3.078 mol , multiply with atomic mass 40.08 g/mol

New concept cars in the Detroit Auto Show feature engines that burn hydrogen gas in air to produce water vapor. Suppose that fuel tank contains 150. L of H2 gas at 20.0 atm pressure at 25.0˚C. If all of this gas is burned, what mass (in grams) of water vapor is produced?

Answers

Answer:

247.2g

Explanation:

Using the general gas law equation as follows:

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/molK)

T = temperature (K)

According to the information in this question, a fuel tank contains 150. L (V) of H2 gas at 20.0 atm (P) at 25.0˚C (T)

Temperature = 25°C = 25 + 273 = 298K

Using PV = nRT

20 × 150 = n × 0.0821 × 298

3000 = 24.4658n

n = 3000/24.4658

n = 122.62

n = 122.6mol

Using the formula, mole = mass/molar mass, to find the mass of H2 gas.

Molar mass of H2 = 1.008(2)

= 2.016g/mol

122.6 = mass/2.016

mass = 122.6 × 2.016

mass = 247.2g.

How many atoms are in 34.2 grams of carbon?

Answers

Answer:

6.02*1022

Explanation:

I don't know why

What is the molality of a solution that contains 435 grams of Fe(ClO 2 3)3 , in 750.0 g of solvent?

Answers

Answer:

2.24 M

Explanation:

Molality is a measure of molar concentration of a solution and it can be calculated using the formula;

Molality = mole of solute ÷ kg of solvent

To calculate the number of moles present in the solute, we use the formula;

mole = mass ÷ molar mass

Molar mass of Fe(ClO2)3 = 56 + {35.5 + 16(2)}3

= 56 + (35.5 + 32)3

= 56 + (67.5)3

= 56 + 202.5

= 258.5g/mol

mole = 435/258.5

mole of Fe(ClO2)3 = 1.68mol

750g of solvent = 750/1000 = 0.750kg of solvent

Molality of the solution is thus: 1.68/0.750

Molality = 2.24 M.

An -ate or -ite at the end of a compound name usually indicates that the compound contains *

fewer electrons than protons.
neutral molecules.
only two elements.
a polyatomic anion.

Answers

Explanation:

1.-Ate-contains 3 elements in which one is oxygen2.-ite-contains 3 elements in which one is Oxygen but the oxygen is less than that of -Ate3.-ide has 2 elements

can send me the answer plzzz

Answers

Answer: In balancing any chemical equations, the number of atoms of each elements on the reactant side is equals to the number of atoms of the elements on the product side.

Explanation:

Balanced Chemical equations are those equations that has the equal number of atoms of elements on both the reactants and the product sides. To ensure that the chemical equations are correctly balanced the following steps should be observed.

--> identify the elements on the reactant side and on the product side

--> identify the number of atoms of each elements.

--> multiply the number of atoms with the number that will give you a coefficient that will make both the reactant and product sides equal.

--> place the new numbers infront of the elements or compounds.

--> A final check is done to know if the equation is balanced.

From the above steps, the balanced equation of the above questions are listed below:

1.) AlBr3 + 3K ---> 3KBr + Al

2.) FeO + PdF2 --> FeF2 + PdO

3.) P4 + 6Br2 --> 4PBr3

4.) 2LiCl + Br2 --> 2LiBr + Cl2

5.) PbBr2 + 2HCl --> 2HBr + PbCl2

6.) 2CoBr3 + 3CaSO4 --> 3CaBr2 + Co2(SO4)3

7.) 2Na3P + 3CaF2 --> 6NaF + Ca3P2

8.) 2Mn + 6HI --> 3H2 + 2MnI3

9.) Li3PO4 + 3NaBr --> Na3PO4 + 3LiBr

10.) CaF2 + Li2SO4 --> CaSO4 + 2LiF

11.) 2HBr + Mg(OH)2 --> MgBr2 + 2H2O

12.) 2LiNO3 + CaBr2 --> Ca(NO3)2 + 2LiBr

13.) AgNO3 + Li --> LiNO3 +Ag

14.) Si(OH)4 + 4NaBr --> SiBr4 + 4NaOH

15.) 2NaCN + CuCO3 --> Na2CO3 + Cu(CN)2

16.) 2NH3 + H2SO4 --> (NH4)2SO4

the mass of a subatomic particle compared to the mass of a proton

Answers

Answer:

neutron

Explanation:

Hopefully this will help you!!!!

4.6 moles of a gas are at a temperature of 325 K and a volume of 96.8 L, what is the pressure of the ga

Answers

Answer:

1.3 atm

Explanation:

Apply the ideal gas law: PV = nRT

Since we need to find the pressure, solve for pressure:

P = nRT / V

Plug in our given values of n = 4.6 moles, R = 0.08206 (ideal gas law constant using atm), T = 325 K, and V = 96.8 L:

P = 4.6(0.08206)(325) / 96.8 = 1.267 atm -> 1.3 atm (two significant figures)

Drought is a weather condition. true or false

Answers

Answer:

true

Explanation:

drought is a period of unusually persistent dry weather that persists long enough to cause serious problems such as crop damage and/or water supply shortages. The severity of the drought depends upon the degree of moisture deficiency, the duration, and the size of the affected area.

Please help as soon as possible
The molecules of which of the following would have the most kinetic energy?
A
boiling water
B
a cold glass of water
C
a warm cup of tea
D
an ice cube

Answers

The answer is
D) an ice cube

Answer:

A

boiling water

Explanation:

The boiling point of water is 212 degrees F. Due to the temperature of the water being this high, the particles are sped up since heat increases kinectic energy.

Does wasting water also waste energy? Explain your reasoning.

Answers

Answer:

Yes.

Explanation:

Wasting household water does not ultimately remove that water from the global water cycle, but it does remove it from the portion of the water cycle that is readily accessible and usable by humans. Also, "wasting" water wastes the energy and resources that were used to process and deliver the water.

Answer:

I feel like there should be more parts to this question but I think it depends on how you got your water. If you waste water after you got it from a local stream yourself, you wasted your body energy but no real electricity of any kind. If the water is processed and filtered and you end up wasting it, I guess it counts as energy being wasted too? Because the sole purpose was to bring you clean water but you didn't utilize it

This catastrophic event hit Sumatra in 2004 and again in 2005, destroying huge amounts of property and killing thousands of people. It is an event generated by earthquakes. It is a A) tsunami. B) tornado. C) hurricane. D) water spout.

Answers

Answer: A

Explanation: I hope this helps!

Answer:

A or C. Best to go with A

Explanation:

Hope it works!!

Which substance is an Arrhenius acid?
A) HBr
B) NaBr
C) NaOH
D) NH3

Answers

Answer:

A

Explanation:

Answer:a

Explanation:

A pool float was filled with air to capacity in the middle of a hot day. The next morning the pool float looked different yet no gas escaped or entered the float. Describe what you think the float looked like in the morning and why it occurred.

Answers

Answer:

The pool float looked would have looked deflated the next morning.

Explanation:

When temperature decreases the volume decreases.

The speed of sound in air is four times as its speed in steel true or false?​

Answers

Answer:

.....false

Explanation:

the particles in the air are packed apart whereas the particles in steel are closely packed and sound travel faster in solids than in gasses..

Answer:

False

Explanation:

The speed of sound is quickest in mediums that have their molecules close apart.  The speed of sounds is quickest in solids, followed by liquids, and slowest in gasses.  The close the molecules are together, the quicker sound travels.  The sound would travel faster in the steel than in the air.

This is due to the fact that sound waves are compression waves.  This means that they rely on the way molecules collide with one another and act sort of like a spring.  

Fun fact: In the old days, people used to put their ears to the train tracks to see if a train is coming.  Sound moves so fast in metal that they can sense the vibrations miles before the train arrived.

Please mark this as brainliest if this helped you!

What is the element of H₂O

Answers

Answer:

It’s water bro

Explanation:

If you have a car that gets 30 miles to the gallon and fuel currently costs $2.60 a gallon, how many miles can you drive if you have 5$ worth of fuel?

Answers

Answer:

57.7 miles.

Explanation:

Hello there!

In this case, according to the given information, it is possible to set up the initial miles-cost ratio as shown below:

[tex]\frac{30mi}{\$2.60}[/tex]

Thus, we can find the the driven miles with $5 by multiplying as follows:

[tex]\frac{30mi}{\$2.60} *\$5\\\\=57.7mi[/tex]

Best regards!

The miles' the car can run with the fuel cost $5 has been 57.69 miles.

The given car run for a 30 miles by 1 gallon of the fuel. The given cost of fuel has been $2.60. Thus, for 30 miles, the cost of fuel has been driven to be $2.60.

The miles that can be driven by the car with $5 has been given by unitary method. The expression has been driven as:

[tex]\$2.60=30\;\rm miles\\\$5=\dfrac{30}{2.60}\;\times\;5\;miles\\\$5=57.69\;miles[/tex]

The miles' the car can run with the fuel cost $5 has been 57.69 miles.

For more information about unitary method, refer to the link:

https://brainly.com/question/11859405

The fastest man on Earth, Usain Bolt, runs at a speed of 10 meters per second. How
long would it take him to run 160 meters?

Answers

Answer: 16 seconds

first set up a proportion

meters/seconds = 10/1 = 160/x

then solve for x

10x = 160
x = 16






The air pressure inside a balloon is 0.783 atm. What is this pressure in mmHg?
Do not include units in your answer.

Answers

Answer:The pressure in mmHg is 59.Explanation:Given data:Pressure of air inside balloon = 0.78 atmPressure in mmHg = ?

Answer:

It is the same it does not change

Explanation:

100 pts Horticulture (HURRY)
Which of the following facets of IPM control systems is most likely to focus on the diversion of pests from a commercial crop?
monitoring
avoidance
suppression
prevention

Answers

Answer:

Suppression

Explanation:

suppression is used to reduce pest populations below the economic threshold if prevention and avoidance tactics have failed--chemical, bio and cultural and other tactics are used which minimize environmental impacts

Answer:

i know im late again but its suppression

Explanation:

Other Questions
Please help with cThanks ASAP PLS I NED HELP PLS PLS PLSODE TO AN OTTERI ought to be an otter, cause when all is said and doneI could play along the riverbank, or stretch out in the sun.Id swim beneath the water, or backstroke up on top.Id dive in like a graceful swan, or do a belly flop.My days would be so peaceful as a furry, swimming mammalAs opposed to bearing burdens like a one-humped desert camel.I wouldnt want to herd sheep like a working collie dogOr end up an amphibiana turtle, toad, or frog.But oh, to be an otter! It would be a stroke of luckJust to spend all day a-swimmin, or a-rollin in the muck.But oh, as fate would have it, Im required to spend my timeDoing schoolwork. What a pity. It seems like such a crime.The month of May has ended, and all across the nationThe schools have shut their doors, and all of the kids are on vacation.Yet here its still the school year, and it cant end too soon,But the days are standing still, stretching till the end of June.Ah, the otter, who, when sunshine makes the heat rise at the shore,Stays within its coolsome burrow, eating clams and snails and more.It swims along the river, catching crayfish, frogs, and trout.Id be an awesome otterof that I have no doubt. Right now I watch the summer tapping at each window paneAnd count the days till school is out, and I can swim again.Ill walk in glorious mud that squeezes coolness through my toesAnd skip along the river, free from tests and schoolwork woes.Till then, Ill be an otter, but only in my head,And start the summer early there, along the riverbed.Cause if I was an otter and could romp and roll and roam,I wouldnt have to think of what to write for my class poem.My days would be so peaceful as a furry, swimming mammal / Asopposed to bearing burdens like a one-humped desert camel.What does the word burdens mean in the sentence above?A. doubtsB. feelingsC. objectsD. riversYet here its still the school year, and it cant end too soon, / But thedays are standing still, stretching till the end of June.What does the author mean by the phrase the days are standing still?F. The days seem to pass by slowly.G. The days are full of difficult work.H. The speakers school day is longer than at most schools.I. There are more school days left than the speaker thought.Ill walk in glorious mud that squeezes coolness through my toes / Andskip along the river, free from tests and schoolwork woes.How would the effect of these lines be different if the author had used the wordwalk instead of skip?A. The speaker would seem less carefree.B. The speaker would seem more friendly.C. The speaker would seem to miss school.D. The speaker would seem less serious.What effect does the authors use of language such as cause, a-swimmin, andawesome create in the poem?F. It makes the speaker sound casual.G. It makes the speaker sound persuasive.H. It makes the speaker seem caring toward all animals.I. It makes the speaker seem knowledgeable about otters.The end of the poem is ironic because the speaker.A. decides to write a poem about an otter.B. turns into an otter and swims away from school.C. changes her mind and doesnt want to be an otter.D. has finished the poem that seemed too hard to write. Balance the following chemicalequation by providing the correctcoefficients. Can anyone list pros and cons of Harper Lee (white woman) writing To Kill a Mockingbird (about racism)?Any other thoughts? hy did Japanese leaders attack Pearl Harbor? To form an alliance with the United States against Germany. They wanted to prevent American leaders from offering assistance to Britain and the Soviet Union against Nazi Germany They hoped to force Americans to accept Japanese supremacy in Asia. The was part of a careful plan for world domination since Japanse leaders believed Americans were racially inferior. 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Have they helped you make sense of the world or made it more difficult to understand?I would appreciate if you did all though lol Drag the tiles to the correct boxes to complete the pairs.Match each term with its definition.scriptdramatic ironydialoguestage directionsDefinitionTerma conversation between two or more charactersarrowRightthe text of a play that the director and actors followarrowRightinformation for only the audiencearrowRightinstructions, usually in italics, to an actor or directorarrowRight Trial-and-error learning _____.happens over timeis the reason birds migrateis inborn find the area of the figure. (3.14 for pi)