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
leva [86]
3 years ago
9

Any observation must be measurable as well as...

Chemistry
2 answers:
Luden [163]3 years ago
7 0
I’m confused on what your asking
marusya05 [52]3 years ago
7 0
What is the question?
You might be interested in
A solution contains 0.021 M Cl and 0.017 M I. A solution containing copper (I) ions is added to selectively precipitate one of t
lidiya [134]

<u>Answer:</u> Copper (I) iodide will precipitate first.

<u>Explanation:</u>

We are given:

K_{sp} of CuCl = 1.0\times 10^{-6}

K_{sp} of CuI = 5.1\times 10^{-12}

Concentration of Cl^-\text{ ion}=0.021M

Concentration of I^-\text{ ion}=0.017M

Solubility product is defined as the product of concentration of ions present in a solution each raised to the power its stoichiometric ratio.

  • <u>For CuCl:</u>

K_{sp}=[Cu^+][Cl^-]

Putting values in above equation, we get:

1.0\times 10^{-6}=[Cu^+]\times 0.021

[Cu^+]=\frac{1.0\times 10^{-6}}{0.021}=4.76\times 10^{-5}M

Concentration of copper (I) ion = 4.76\times 10^{-5}M

  • <u>For CuI:</u>

K_{sp}=[Cu^+][I^-]

Putting values in above equation, we get:

5.1\times 10^{-12}=[Cu^+]\times 0.017

[Cu^+]=\frac{5.1\times 10^{-12}}{0.017}=3.00\times 10^{-10}M

Concentration of copper (I) ion = 3.00\times 10^{-10}M

For the precipitation of copper (I) ions, we need less concentration of copper (I) ions. So, copper (I) iodide will precipitate first.

7 0
3 years ago
What is carbon monoxide
saw5 [17]

Answer:

hope this helps

Explanation:

Carbon monoxide (CO) is an odorless, colorless gas formed by the incomplete combustion of fuels. When people are exposed to CO gas, the CO molecules will displace the oxygen in their bodies and lead to poisoning.

4 0
3 years ago
Read 2 more answers
How will the vapor pressure of a solution compare to the pure solvent?
n200080 [17]

Answer: vapor pressure of solution will be less than that of the pure solvent

Explanation:

Vapor pressure of a liquid  is defined as the pressure exerted by the vapors  in equilibrium with the liquid/solution at a particular temperature.

So, when a non-volatile solute is added to a solvent then its molecules align at the surface of liquid. As a result, less number of solvent molecules will escape from the solution. Thus, there will be decrease in vapors and thus the vapor pressure decrease.

As the relative lowering of vapor pressure is directly proportional to the amount of dissolved solute.

The formula for relative lowering of vapor pressure will be,

\frac{p^o-p_s}{p^o}=\frac{w_2M_1}{w_1M_2}

where,

p^o = vapor pressure of pure solvent

p_s = vapor pressure of solution  

w_2 = mass of solute

w_1 = mass of solvent  

M_1 = molar mass of solvent

M_2 = molar mass of solute

4 0
3 years ago
Is melting wax a solid
MrMuchimi

Answer:

Paraffin wax (or petroleum wax) is a soft colorless solid, derived from petroleum, coal or shale oil, that consists of a mixture of hydrocarbon molecules containing between twenty and forty carbon atoms. It is solid at room temperature and begins to melt above approximately 37 °C.

5 0
3 years ago
Read 2 more answers
How old is the sun and since its birth, how has the sun changed?
skelet666 [1.2K]

Answer:

The present age of the Sun is 4.6 billion years old. It will live for about 5.4 billion years more. Initially, the Sun was majorly composed of Hydrogen. Current composition of the Sun is 70% hydrogen, 28% Helium and 2% heavier elements. Thus, the composition has changed since birth due to nuclear fusion process in the core.

4 0
3 years ago
Other questions:
  • What is the IUPAC name of the following compound?
    13·1 answer
  • How many milliliters of 0.125 M FeCl3 are needed to react with an excess of Na2S to produce 3.75 g of Fe2S3 if the percent yield
    13·1 answer
  • Which of the following might be an indicator of global warming?
    11·1 answer
  • What type of bonding holds the atoms in an h2o molecule together?
    9·1 answer
  • . Mitosis allows one cell to grow and split into 2 new cells. Will those 2 new cells split again explain.
    9·1 answer
  • The following chemical reaction occurs in a basic solution.
    6·1 answer
  • Based on the activity series of metal, which reaction with water will not happen?
    10·1 answer
  • A sample of a compound contains 41.33 g of carbon and 8.67 g of hydrogen. The molar mass of the
    9·1 answer
  • What is the name of this unstable isotope from number 9?
    8·2 answers
  • How many hydrogen atoms are present in a hydrocarbon chain of 8 carbon atoms with 3 double bonds and the rest single bonds
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!