The dichloromethane (DCM) has less density than water and also the polarity of water is much more than DCM. So the mixture of water and dichloromethane will always be a heterogeneous mixture. In the mixture dichloromethane will be always up of the water layer. The volume of the separatory funnel which contains the mixture of DCM and water must have to be more than the total volume of the liquids thus the volume of the funnel will be more than (50+50) = 100mL.
The caution have to consider during the separation are-
1. The separatory funnel have to shake well with lid and have to settle down for some times until the two liquid separated.
2. The lid should be open very slowly as the vapor pressure of DCM is more and it will float on the water.
3. After this the stopcock should be opened and slowly the water will come out first followed by DCM.
Answer:
5.3 × 10⁻³ kg
Explanation:
There is some info missing. I think this is the original question.
<em>A chemist adds 135.0 mL of a 0.21 M zinc nitrate (Zn(NO₃)₂) solution to a reaction flask. Calculate the mass in kilograms of zinc nitrate the chemist has added to the flask. Be sure your answer has the correct number of significant digits.</em>
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We have 135.0 mL of a 0.21 M zinc nitrate (Zn(NO₃)₂) solution. The moles of zinc nitrate are:
0.1350 L × 0.21 mol/L = 2.8 × 10⁻² mol
The molar mass of zinc nitrate is 189.36 g/mol. The mass corresponding to 2.8 × 10⁻² moles is:
2.8 × 10⁻² mol × 189.36 g/mol = 5.3 g
1 kilogram is equal to 1000 grams. Then,
5.3 g × (1 kg/1000 g) = 5.3 × 10⁻³ kg
Answer:
Q1) Mole ratio would be 1:1
Answer:
I think it is A. the two forces are equal, or balanced, neither the table nor the book moves up or down.
Explanation:
Tome, the other options don’t make no sense
The organic product formed when the ethanoic acid and diethylamine compounds undergo a substitution reaction is N, N- diethyl ethanamide.
<h3>What is Substitution reaction? </h3>
Substitution reaction is a reaction in which one group substitute the functional group of another organic compound or it can also be defined as a reaction that involves the replacement of one atom or group of atoms of a compound with another atom or group of atom.
<h3>Types of Substitution reaction</h3>
Substitution Reactions are basically of two types:
nucleophilic reaction and electrophilic reactions. These two types of substitution reactions differ in the types of atom that is attached to its original molecule. In the nucleophilic reactions, the atom is electron-rich species, on the other hand, in the electrophilic reaction, the atom is an electron-deficient species.
Thus, we concluded that the organic product formed when the ethanoic acid and diethylamine compounds undergo a substitution reaction is N, N- diethyl ethanamide.
learn more about substitution reaction:
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