1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kumpel [21]
3 years ago
14

Epinephrine (adrenaline) is a hormone secreted into the bloodstream in times of stress. It contains 59.0% C, 7.15% H, 26.20% O,

and 7.65% N and has a molar mass of 183 g/mol. What is its molecular formula
Chemistry
1 answer:
vichka [17]3 years ago
3 0

Answer:

C9H13O3N

Explanation:

Take the atomic mass of C=12.0, H=1.0, O=16.0 and N=14.0.

We can draw a chart (please view this on desktop so to avoid spacing errors):

Let the mass of Epinephrine be 100g.

                             C                       H                          O                              N

mass(g) :              59                      7.15                    26.2                         7.65

no. of moles : 59/12 =4.9167     7.15/1 = 7.15     26.2/16=1.6375 7.65/14=0.5464

(n.o.m. = mass/molar mass)

Ratio:   4.9167/0.5464 =9    7.15/0.5464=13      1.6375= 3      0.5464/0.5464 =1

(divide the n.o.m. by the smallest n.o.m., which is 0.5464 in this case, take the whole numbers)

So, the empirical formula will be: C9H13O3N

But this is still not yet the molecular formula. We have to ensure the molar mass is 183g/mol. Multiply the empirical formula by n.

So, let the molecular formula of Epinephrine be (C9H13O3N)n.

12x9n + 1x13n + 16x3n + 14n = 183

108n + 13n + 48n + 14n = 183

183 n = 183.

n = 1

Hence, the molecular formula is C9H13O3N.

You might be interested in
NO FILES
MrMuchimi

Answer:

the general equation is: A + X → AX. Where a single compound on the reactant side breaks down into two or more products during a chemical change. The general equation is AX → A + X.

Explanation:

6 0
3 years ago
How many centimeters are in 5.6 x 10-2 meters?
drek231 [11]

Answer:

0.5

Explanation:

8 0
3 years ago
In compliance with conservation of energy, Einstein explained that in the photoelectric effect, the energy of a photon (hv) abso
3241004551 [841]

Answer:

 a) 1.866 × 10 ⁻¹⁹ J      b)   3.685 × 10⁻¹⁹ J

Explanation:

the constants involved are

h ( Planck constant) = 6.626 × 10⁻³⁴ m² kg/s

Me of electron = 9.109 × 10 ⁻³¹ kg

speed of light = 3.0 × 10 ⁸ m/s

a) the Ek ( kinetic energy of the dislodged electron) = 0.5 mu²

Ek = 0.5 × 9.109 × 10⁻³¹ × ( 6.40 × 10⁵ )² = 1.866 × 10 ⁻¹⁹ J

b) Φ ( minimum energy needed to dislodge the electron ) can be calculated by this formula

hv =   Φ + Ek

where Ek = 1.866 × 10 ⁻¹⁹ J

v ( threshold frequency ) = c / λ where c is the speed of light and λ is the wavelength of light = 358.1 nm = 3.581 × 10⁻⁷ m

v = ( 3.0 × 10 ⁸ m/s ) / (3.581 × 10⁻⁷ m ) = 8.378 × 10¹⁴ s⁻¹

hv = 6.626 × 10⁻³⁴ m² kg/s ×  8.378 × 10¹⁴ s⁻¹ = 5.551 × 10⁻¹⁹ J

5.551 × 10⁻¹⁹ J = 1.866 × 10 ⁻¹⁹ J + Φ

Φ = 5.551 × 10⁻¹⁹ J - 1.866 × 10 ⁻¹⁹ J = 3.685 × 10⁻¹⁹ J

7 0
2 years ago
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 14.4 g of carbon were burned in the presence of
Natasha2012 [34]

When carbon reacts with oxygen it forms CO2. This can depicted by the below equation.

C + O2→ CO2

It has been mentioned that when 14.4 g of C reacts with 53.9 g of O2, then 15.5 g of O2 remains unreacted. <u>This indicates that Carbon is the limiting reagent and hence the amount of CO2 produced is based on the amount of Carbon burnt.</u>

C + O2→ CO2

In the above equation , 1 mole of carbon reacts with 1 mole of O2 to produce 1 mole of CO2.

In this case 14.4 g of Carbon reacts with 53.9 of O2 to produce "x"g of CO2.

<u>No of moles = mass of the substance÷molar mass of the substance</u>

No of moles of carbon = 14.4 /12= 1.2 moles

No of moles of O2 = Mass of reacted O2/Molar mass of O2.

No of moles of O2 = (Total mass of O2 burned - Mass of unreacted O2)/32

No of moles of O2 = (53.9-15.5) ÷ 32 = 1.2 moles.

Hence as already discussed 1 mole of Carbon reacts with 1 mole of O2 to produce 1 mole of CO2. In this case 1.2 moles of carbon reacts with 1.2 moles of O2 to produce 1.2 moles of CO2.

Moles of carbon dioxide = Mass of CO2 produced /Molar mass of CO2

Mass of CO2 produced(x) = Moles of CO2 ×Molar mass of CO2

Mass of CO2 produced(x) = 1.2 x 44 = 52.8 g

<u>Thus 52.8 g of CO2 is produced.</u>

5 0
2 years ago
Similarities and differences between solids liquids and gases
Masteriza [31]

Answer:

Detail is given below.

Explanation:

Similarities:

All are the forms of matter.

Solid, liquid and gases are made up of ions, atoms and molecules.

They have shape and volume.

Molecules in Liquid and solid are closer to each others.

Liquid and gases can flow very easily.

Liquid and solid both can not compressed very easily.

Differences:

Molecule of gases randomly move everywhere and occupy all available space but liquid and solid's molecules are not move as much easier as molecules of gases can.

The density of gases are very low as compared to the liquid and solid.

Gas molecules are at long distance from each other while in liquid and solid they are closer to each other.

The very weak inter molecular forces are present between gas molecules as compared to the liquid and solids.

Solids have definite volume and shape but liquid and gases acquire the shape of container.

In solids molecules are tightly pack and very close to each other while in liquid molecules are not tightly pack like in case of solid.

The densities of solids are also very high as compared to the liquid and gas.

There are very strong inter molecular forces are present between solid molecules.

8 0
3 years ago
Other questions:
  • In the gizmo what light intensity in CO2 level do you think will maximize the rate photosynthesis
    15·1 answer
  • Based on the equations below, which metal is the most active? pb(no3)2 (aq) + ni (s) â ni(no3)2 (aq) + pb (s) pb(no3)2 (aq) + ag
    9·1 answer
  • An object has a mass of 6.8 g and volume of 34 mL. What is the density of the object?​
    14·1 answer
  • What time did frosty die in frosty meets his demise
    11·1 answer
  • Define international system of units , where does the system originate
    6·1 answer
  • Write Balance chemical reaction for preparation of chlorine with or without application heat<br>​
    10·1 answer
  • PLEASE HELP. WILL GIVE BRAINLIEST AND QUESTION WORTH A 100 POINTS. NEED ANDWER ASAP!
    5·1 answer
  • Rank the following atoms and ions from least to greatest ionization energy:
    12·1 answer
  • 1. What are 4 physical properties of oxygen? <br><br> 2. What are 4 chemical properties of oxygen?
    6·1 answer
  • How many moles of oxygen are necessary to generate 28 moles of water, according to the following equation: 2H2+O2→2H2O
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!