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
bulgar [2K]
3 years ago
8

Select the unitless quantities: a, absorbance c, solute concentration i/i0 (ratio of emergent to incident intensity) b, pathleng

th
Chemistry
1 answer:
lianna [129]3 years ago
8 0
Absorbance is unitless by definition, this is the fraction of light absorbed.
Solute concentration will have mol/L units, so it is not unitless.
i/i0 (ratio of emergent to incident intensity) is similar to absorbance, and the units will cancel out, making this unitless.
Path length will have a unit in millimeters or centimeters, so it is not unitless.

Therefore the unitless quantitites are absorbance and intensity ratio.
You might be interested in
A pan containing 20.0 grams of water was allowed to cool from a temperature of 95.0 °C. If the amount of heat released is 1,200
34kurt

Answer:

81 °C

Explanation:

This is a calorimetry question so a few things you will need for this. The calorimetry equation q=mcΔT & the specific heat of water (4.2J/g•°C). Other definitions are:

q = heat added/released by a sample

m = mass of sample

c=specific heat of sample

ΔT = change in temperature

from here we can rearrange the equation to state:

q/(mc) = ΔT

1200J/((20.0g)(4.2J/g•°C)) = ΔT

14°C = ΔT

If the starting temperature was 95.0°C and we know that the temperature was cooled by 14°C then the final temperature of the water would be 81.

4 0
2 years ago
Which of the following is an example of potential energy?
maxonik [38]

Answer: the person standing up

Explanation:

the person has the potential to fall or move from position

6 0
3 years ago
Read 2 more answers
What are things that we use that are made of the elements on the periodic table
mylen [45]

Answer:

all matter (everything) is made of the elements on the periodic table

Explanation:

6 0
3 years ago
Who is Gilbert Newton lewis ​
skelet666 [1.2K]

Gilbert N. Lewis (1875-1946) was an American physical chemist.  

His work with heavy water and resources were adapted by Ernest Lawrence in the development of the cyclotron.

 

SCIENTIFIC CONTRIBUTIONS

Lewis made many contributions to science. He was nominated for the Nobel Prize 41 times, though he was never awarded the prize.

He discovered covalent bonds and electron pairs. He worked with isotope separation, and became the first person to purify a sample of heavy water. The heavy water was later used as projectiles in Lawrence’s 27-inch cyclotron.  

He also made contributions in ideas on relativity and acid-base reactions and coined the term “photon” as the smallest unit of light.

8 0
3 years ago
the mass of a jar and lid with white marbles and black marbles is 1,500 grams. The mass of the marbles alone 1/2 the total mass
Naddik [55]
The mass of the jar with marbles is heavier then the total mass of only the marbles
6 0
3 years ago
Other questions:
  • What is the theoretical yield of carbon dioxide?<br>a)0.993 g<br>b)2.98 g<br>c)3.65 g<br>d)8.93 g​
    6·1 answer
  • If I wrote 7h2o, how many hydrogen atoms do I have now? How many oxygen atoms?
    13·2 answers
  • 100 ml of soft drink A contains 75g of sugar and weighs 110g. calculate density
    7·1 answer
  • The energy exchange with the environment during a chemical reaction is called the heat of reaction.
    14·1 answer
  • The molarity of a solution containing 7.1 g of sodium sulfate in 100 mL of an aqueous solution is
    15·2 answers
  • For the equilibrium
    6·1 answer
  • Balance each of these equations.
    12·1 answer
  • How are three of the properties​
    11·1 answer
  • Choose all the answers that apply.
    12·2 answers
  • Describe how a metal less reactive than carbon can be reduced from its ore
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!