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
soldi70 [24.7K]
3 years ago
10

What is a commission?

Chemistry
1 answer:
Marat540 [252]3 years ago
5 0

Answer:

B. a military unit

Explanation:

You might be interested in
What are the science definitions of these
Alecsey [184]

Answer:

Eon-an indefinite and very long period of time, often a period exaggerated for humorous or rhetorical effect.

Era

Paleozoic-its end was marked by mass extinctions

mesozoic-between cenozoic and paleozoic

cenozoic- most recent era

period-a length of time

epoch-age

mass extinction- a huge die off of animals

landbridge- a strip of land connecting two large land masses

geographic isolation-island

Explanation:

3 0
3 years ago
When u place an iron nail in basin of water and leave it for two days what is formed in the iron nail​
erastova [34]

Answer:

When you place an iron nail in a basin of water and leave it for two days, what will happen to the iron nail? It will form rust on the surface of the nail. Rust forms when iron combines with oxygen to form iron oxide.

Explanation:

Assuming they were clean of rust to begin with, and are made of an ordinary steel - they start to rust - will turn orange, and the orange sediment...

Not much if any while it's in the water for that period of time. However once you remove it then it will be exposed two oxygen and will start to ox...

If it is not coated properly It will form Rust .

6 0
3 years ago
Describe a procedure to separate a mixture of sugar black pepper and pebbles
andreyandreev [35.5K]
1st you pour the mixture<span> through a filter to remove the larger </span>pebbles<span>. Next, add water to dissolve the salt and then filter out the </span>pepper the last thing you do <span>evaporate the water to leave the salt behind.</span>
5 0
3 years ago
PLEASE HELP ASAP!!!! 15PTS
MA_775_DIABLO [31]

Answer:

Both contain a hydroxyl group on the second carbon.

Neither contain a hydroxyl group on an end chain carbon.

Explanation:

2,2-butanediol Formula: C4H10O2

2,3,4-pentanetriol Formula: C5H12O3

Both contain a hydroxyl group on the second carbon.

Neither contain a hydroxyl group on an end chain carbon.

5 0
3 years ago
In a 200 cm3 container, a certain amount of O2 gas is held with a piston at equilibrium with the external pressure being 1 bar.
Maslowich

Answer:

a) V2 = 200.161 cm³

b)  Wexp = 0.0161 J done by the system

c) ΔU = 1.984 J

d) ΔH = 2.006 J

Explanation:

ΔU = Q + W.....first law

a) at constant temperature (298 K ):

∴ ΔU = 0 ⇒ Q = - W

∴ W = - ∫ P dV

⇒ Q = ∫ PdV

∴ PV = nRT

⇒ P = nRT / V

⇒  Q = ∫ nRT dV/V

⇒ Q = nRT Ln ( V2 / V1 )....assuming n O2 = 1 mol

⇒  Q / nRT = Ln ( V2 / V1 )

⇒ 2 J / (( 1mol) ( 8.314 J/molK * 298 K )) = Ln ( V2 / V1 )

⇒ 8.072 E-4 = Ln ( V2 / V1 )

⇒ 1.001 = V2 / V1

⇒ V2 = 1.001 * 200 cm³

⇒ V2 = 200.161 cm³  ( 2.00161 E-4 m³)

b) Wexp = - ∫ PdV.......work done by the system ( - )

P = 1 bar = 10197.2 Kgf/m²

⇒ W exp = - 10197.2 Kgf/m² * ( 2.00161 E-4 - 2.00 E-4 )m³

⇒ W exp = - 1.642 E-3 Kgf *m ( - 0.0161 J )

c) ΔU = Q + W

⇒ ΔU = 2 J - 0,0161 J

⇒ ΔU = 1.984 J   ( 0.202 Kgf*m )

d) H = U + PV.....ideal gas

⇒ ΔH = Δ ( U + PV )

⇒ ΔH = ΔU + P2V2 - P1V1

⇒ ΔH = 0.202  + (( 10197.2 * 2.00161 e-4 )) - (( 10197.2 * 2.00 E-4 ))

⇒ ΔH = 0.202 + 2.041 - 2.0394

⇒ ΔH = 0,204 Kgf*m ( 2.006 J )

8 0
4 years ago
Other questions:
  • When is using the median more useful
    5·1 answer
  • How many different values of l are possible in the third principal level?
    12·1 answer
  • Which units express specific heat capacity?
    14·2 answers
  • Calculate the atomic mass of nitrogen if the two common isotopes of nitrogen have masses
    10·1 answer
  • How many milliliters of a 2.5 m lioh solution are needed to completely neutralize 50 ml if a 1.0 m h2so4 solution?
    6·1 answer
  • Giving brainliest for answers too ALL 3
    7·2 answers
  • What is also known as neutralization? 1. Acid-base 2. Redox 3. Precipitation
    7·1 answer
  • What are common materials​
    5·1 answer
  • Convert 18◦C to Kelvin.
    11·2 answers
  • How many grams of KCl 03 are needed to produce 6.75 Liters of O2 gas measured at 1.3 atm pressure and 298 K?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!