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MA_775_DIABLO [31]
3 years ago
10

In a concentration calculation, if we are given the moles of solute and the grams of solvent, what do we need to do first in ord

er to find the molality?
Chemistry
2 answers:
True [87]3 years ago
8 0

Answer:

Amount of solute/ mass of solvent in kilogrammes

Explanation:

The molality is defined as amount of solute divided by mass of solvent in kilogrammes. Hence first convert the mass of solvent to kilogrammes and the divide the given amount of solute in moles by this mass of solvent in kilogrammes. This gives us the molality of the solution

valentinak56 [21]3 years ago
5 0
You need to know the liters since molarity is found by dividing moles by liters.
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write a skeletal equation for the following reaction: An aqueous solution of barium nitrate and an aqueous solution of sodium su
belka [17]

Answer: skeletal equation : Ba(NO_3)_2(aq)+Na_2SO_4(aq)\rightarrow NaNO_3(aq)+BaSO_4(s)

The products are sodium nitrate and barium sulphate.

balanced equation :  Ba(NO_3)_2(aq)+Na_2SO_4(aq)\rightarrow 2NaNO_3(aq)+BaSO_4(s)

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.  

The skeletal equation is:

Ba(NO_3)_2(aq)+Na_2SO_4(aq)\rightarrow NaNO_3(aq)+BaSO_4(s)

The balanced chemical equation is:

Ba(NO_3)_2(aq)+Na_2SO_4(aq)\rightarrow 2NaNO_3(aq)+BaSO_4(s)

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3 years ago
What is Ka for HCN(aq) H+(aq)+CN-(aq)?​
Ierofanga [76]
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Answer:

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A parallel circuit is defined as the circuit in which a number of resistances are linked across each other in such a way that one terminal of each resistance is connected to form a junction point while the remaining end is also connected to form another point.

You havent added the diagram so i cant tell you the answer, but i added the definition of each circuit, see if that helps!

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3 years ago
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