Step 1
% by mass:
Mass of solute ---- 100 of solution
Mass of solution = mass of solute + mass of solvent = 55.0 g + 137 g = 192 g
Solute = NH4Cl
Solvent = Water (H2O)
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Step 2
Procedure:
55.0 g NH4Cl --------- 192 g solution
X ---------- 100 g solution
X = 29 g NH4Cl = 29 % by mass approx.
Answer: 29 % by mass
2KMno4+16hcl=2kcl+2mncl2+8h2o+5cl2
Answer:
There is a basic difference, because mass is the actual amount of material contained in a body and is measured in kg, gm, etc. Whereas weight is the force exerted by the gravity on that object mg. Note that mass is independent of everything but weight is different on the earth, moon, etc.
I believe this nuclide is potassium with the symbol K. Atomic number for an element remains constant no matter how the mass changes. From the periodic table, potassium has an atomic number of 19.
In the given reaction, the substance that is the base of the reaction is 
. The correct option is C.
<h3>What is a base?</h3>
The base is a slippery liquid that is bitter and turns red litmus paper to blue.
Bases react with acids to form salts.
Then bases have pH above 7.
Examples of bases are calcium carbonate, sodium hydroxide, etc.
Thus, the correct option is C.
Learn more about bases
brainly.com/question/485375
