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
kotegsom [21]
2 years ago
13

Well over _______ different organic compounds are known to exist.

Chemistry
1 answer:
stich3 [128]2 years ago
6 0
The answer is 4 million, there are about 9-10 million unique organic compounds that are known to exist
You might be interested in
A first order reaction has a rate constant of 0.543 at 25 c and 6.47 at 47
alukav5142 [94]

The activation energy Ea can be related to rate constant (k) at temperature (T) through the equation:

ln(k2/k1) = Ea/R[1/T1 - 1/T2]

where :

k1 is the rate constant at temperature T1

k2 is the rate constant at temperature T2

R = gas constant = 8.314 J/K-mol

Given data:

k1 = 0.543 s-1; T1 = 25 C = 25+273 = 298 K

k2 = 6.47 s-1; T = 47 C = 47+273 = 320 K

ln(6.47/0.543) = Ea/8.314 [1/298 - 1/320]

2.478 = 2.774 *10^-5 Ea

Ea = 0.8934*10^5 J = 89.3 kJ

5 0
2 years ago
In an experiment, students were given an unknown mineral. The unknown mineral was placed in 150 ml of water. Once in the water,
Dahasolnce [82]

Answer:

<h2>15 g/mL</h2>

Explanation:

The density of a substance can be found by using the formula

density =  \frac{mass}{volume}  \\

But from the question

volume = final volume of water - initial volume of water

volume = 165 - 150 = 15 mL

We have

density =  \frac{225}{15}  = 15 \\

We have the final answer as

<h3>15 g/mL</h3>

Hope this helps you

5 0
2 years ago
Plz help, have a quiz on this plz PLZ
katovenus [111]

Answer:

20.82

Explanation:

7 0
3 years ago
How many valence electrons are in atom of sulfur?
Nookie1986 [14]
The answer is six because it is in group six A on the periodic table.
8 0
2 years ago
Pb(SO4)2 + 4 LiNO3 → Pb(NO3)4 + 2 Li2SO4
Anvisha [2.4K]

Answer:

4.5 moles of lithium sulfate are produced.

Explanation:

Given data:

Number of moles of lead sulfate = 2.25 mol

Number of moles of lithium nitrate = 9.62 mol

Number of moles of lithium sulfate = ?

Solution:

Chemical equation:

Pb(SO₄)₂ + 4LiNO₃      →     Pb(NO₃)₄ + 2Li₂SO₄

Now we will compare the moles of lithium sulfate with lead sulfate and lithium nitrate.

                       Pb(SO₄)₂        :         Li₂SO₄

                            1                :             2

                          2.25           :          2/1×2.25 = 4.5 mol

                       LiNO₃            :             Li₂SO₄

                           4                :                2

                           9.62           :             2/4×9.62 = 4.81 mol

Pb(SO₄)₂  produces less number of moles of Li₂SO₄ thus it will act as limiting reactant and limit the yield of  Li₂SO₄.      

7 0
2 years ago
Other questions:
  • PLEASE HELP WILL GIVE BRAINIEST
    13·1 answer
  • Divide 98.66 grams by 10.3 mL
    15·1 answer
  • Is food coloring dissolving in water a chemical change
    10·2 answers
  • Which of the following takes place during a redox reaction? A. Electrons are gained only. B. Electrons are lost only. C. Electro
    8·2 answers
  • A) How many grams of water are produced when 2.50 g of aluminum
    14·1 answer
  • Climate change as we know it today is
    5·1 answer
  • What are the three components of soil texture? <br><br> Hurry please help!
    6·1 answer
  • 2) Convert 2.65*10^ ^ 25 atoms of Chlorine to moles of CI
    7·1 answer
  • Which type of bond and how many bonds would occur as carbon dioxide (CO2) is formed from carbon in Group IVA and oxygen in Group
    12·1 answer
  • How is this type of question solved?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!