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
sashaice [31]
3 years ago
15

If you have 670.0 g of water and wish to make a 2.13 m solution of KBr, how many grams of the solute would you have to add to th

e water that you have?
Chemistry
1 answer:
laila [671]3 years ago
6 0
I believe that for this item, the unit m is for the molality which is equal to mole of solute to kg of solvent. For water that is 670 g, the equivalent in kg is equal to 0.670 kg. Then using the equation,
                          molality = moles solute / kg solvent
and substituting the known values,
                        2.13 = moles solute / 0.670 kg
The amount of solute should be 1.4271 moles. Then, we multiply this value with the molar mass of KBr which is equal to 119.002 g/mol. The answer would be 169.83 g.
You might be interested in
Name two factors that influence the viscosity of a lava flow
mr_godi [17]
Three factors that affect magma viscosity are temperature, composition, and presence of dissolved gases. 
6 0
3 years ago
A student collected the data shown in the table below during an experiment.
yanalaym [24]

Answer:

An alcohol thermometer can measure the freezing point of a liquid that freezes at −80 °C.

Explanation:

A thermometer is a device used to measure temperature. A thermometer must contain a thermometric substance. A thermometric substance is any substance having a particular physical property that changes with temperature.

For all liquid-in-glass thermometers, the property that changes with change in temperature is the height of the liquid. There are two kinds of liquid-in-glass thermometers; mercury-in-glass thermometer and alcohol-in-glass thermometer.

Alcohol-in-glass thermometer measures very low temperatures up to as low as -115°C. If it measures such a low temperature, then it can efficiently measure -80°C hence the answer.

Alcohol-in-glass thermometers have a narrower temperature range than mercury-in-glass thermometer. The later is well adapter for the measurement bof higher tempetures up to 357°C.

4 0
2 years ago
Read 2 more answers
Homeostasis is the balance between your internal and external environments. We
topjm [15]

Answer:

They are already matched for you. It goes

1.

2.

3.

in the order of the questions.

8 0
3 years ago
A negative change in entropy indicates that...
vovangra [49]

Answer:

B. the products have a smaller number of available energy microstates than the reactants.

4 0
2 years ago
Read 2 more answers
3.1
stich3 [128]

Answer:

C3H8 +5O2 arrow 3CO2 +4H2O

4 0
3 years ago
Other questions:
  • Explain that : how we explore different between Licl and Nacl
    7·1 answer
  • The vapour pressure of pure benzene at 20 °C is 75 Torr and that of pure methylbenzene is 25 Torr at the same tempera-ture. In a
    10·1 answer
  • What happens to earth materials when water flows over landforms?
    11·1 answer
  • A patient needs to take 625 mg of ibuprofen twice daily. The pills in the bottle are each 250. mg. How many pills does the patie
    6·2 answers
  • Sugars have a(n) __________ group that interacts with a _________ group that forms ring structures when the dry molecule is plac
    6·1 answer
  • If a plant produces 9.31 mol of C6H12O6, how many moles of H2O are needed?
    14·2 answers
  • What carries the useful energy of a lamp to its surroundings?
    10·1 answer
  • When a positive ion is formed, the resulting ion is
    10·1 answer
  • Reasons and how we arrange elements according to their positions in the electrochemical series​
    12·1 answer
  • Cocaine (C₁₇H₂₁O₄N) is a natural substance found in coca leaves, which have been used for centuries as a local anesthetic and st
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!