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
Mrac [35]
3 years ago
6

It is common to mix polar solvents (e.g., acetone) with non-polar solvents (e.g., hexane) to obtain an eluting solvent of interm

ediate polarity. Would it be appropriate to use a water-DMSO mixture
Chemistry
1 answer:
hammer [34]3 years ago
6 0

Answer:

No, it is not appropriate to mix water and DMSO

Explanation:

We have to realize that DMSO is a highly polar solvent and water is a highly polar solvent. The question explicitly says that our target is to produce a solvent of<u><em> intermediate polarity</em></u>.

We can only do this by mixing a polar and a nonpolar solvent. We have been given the example of the mixture of acetone/hexane which is quite a perfect mixture.

Thus, it is inappropriate to mix DMSO and water.

You might be interested in
A 0.245-L flask contains 0.467 mol co2 at 159 °c. Calculate the pressure using the ideal gas law.
lubasha [3.4K]

Answer:

Pressure, P = 67.57 atm

Explanation:

<u>Given the following data;</u>

  • Volume = 0.245 L
  • Number of moles = 0.467 moles
  • Temperature = 159°C
  • Ideal gas constant, R = 0.08206 L·atm/mol·K

<u>Conversion:</u>

We would convert the value of the temperature in Celsius to Kelvin.

T = 273 + °C

T = 273 + 159

T = 432 Kelvin

To find the pressure of the gas, we would use the ideal gas law;

PV = nRT

Where;

  • P is the pressure.
  • V is the volume.
  • n is the number of moles of substance.
  • R is the ideal gas constant.
  • T is the temperature.

Making P the subject of formula, we have;

P = \frac {nRT}{V}

Substituting into the formula, we have;

P = \frac {0.467*0.08206*432}{0.245}

P = \frac {16.5551}{0.245}

<em>Pressure, P = 67.57 atm</em>

4 0
3 years ago
Write a balanced equation for the reaction of ca with hcl
Aleksandr-060686 [28]
Ca(s)+2Hcl(aq) ------>CaCl2(s)+H2(g)
3 0
3 years ago
When 125 mL of 0.150 M Pb(NO3)2 is mixed with 145 mL of 0.200 M KBr, 4.92 g of PbBr2 is collected. Calculate the percent yield.
Semenov [28]

Answer:

Y = 92.5 %

Explanation:

Hello there!

In this case, since the reaction between lead (II) nitrate and potassium bromide is:

Pb(NO_3)_2+2KBr\rightarrow PbBr_2+2KNO_3

Exhibits a 1:2 mole ratio of the former to the later, we can calculate the moles of lead (II) bromide product to figure out the limiting reactant:

0.125L*0.150\frac{molPb(NO_3)_2}{L} *\frac{1molPbBr_2}{1molPb(NO_3)_2} =0.01875molPbBr_2\\\\0.145L*0.200\frac{molKBr}{L} *\frac{1molPbBr_2}{2molKBr} =0.0145molPbBr_2

Thus, the limiting reactant is the KBr as it yields the fewest moles of PbBr2 product. Afterwards, we calculate the mass of product by using its molar mass:

0.0145molPbBr_2*\frac{367.01gPbBr_2}{1molPbBr_2} =5.32gPbBr_2

And the resulting percent yield:

Y=\frac{4.92g}{5.32g} *100\%\\\\Y=92.5\%

Regards!

4 0
3 years ago
which piece of evidence provides the strongest support for the theory that all living things evolved from a common ancestor?    
lianna [129]
There are many pieces of evidence provided as strong evidence: fro example the Comparative anatomy of many species. <span>This evidence is based on compares of the the skeletons of humans, cats, whales, and bats, illustrating how similar they are even though these animals live unique lifestyles in very different environments. Another piece of evidence is </span><span>biochemistry of all living things on Earth. This is so because is incredibly similar. This shows that all of Earth’s organisms share a common ancestry.</span>
5 0
3 years ago
What is the mass of 0.100 mole of neon? (Watch sf’s) 2.018 g 20.18 g 2.02 g 2 g
makkiz [27]

Answer:

The mass of 0.100 mole of neon is 2.018 grams.

Explanation:

As we know the formula to find mass:

                           Number of moles         =  Mass/ Molar mass

                                        0.100                = Mass/ 20.17

                                        0.100 x 20.17   = Mass

                                                        Mass=2.018 grams.

Hope it helps!

7 0
3 years ago
Other questions:
  • Suppose you want to make 100 grams of water, what is the molar mass of water
    14·1 answer
  • 1. What type of reaction occurs when an acid reacts with a base?
    10·1 answer
  • A neutralization reaction is a _________ replacement reaction that starts with an ________ and a __________ and ends with ______
    14·1 answer
  • For this ionic compound, what would be the name of the anion? Ca(NO3)2
    15·2 answers
  • At low temperatures and pressure, how does the volume of a real gas compare with the volume of an ideal gas under the same condi
    14·1 answer
  • !!15 points!!! Antifreeze is added to a car's radiator to protect it. Which of the following
    6·1 answer
  • Some baking soda and vinegar were weighed separately and the weights added together. The two substances are mixed and a chemical
    10·2 answers
  • Describe molecules *no plagiarism like google etc!*
    10·1 answer
  • Which of the following substance is most likely basic​
    12·1 answer
  • If a glass of water is left in open air for two days, what changes would it undergo in terms of
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!