Answer:
650 grams
Explanation:
Given that acetylene gas reacts with oxygen to produce caobon dioxide, water and heat and the unbalnced equation is
Gram-formula mass of 
g/mol
So, mass of 1 mole of acelylene is 26 grams
Therefore, mass of 25 moles of acelylene=25x26=650 grams
Hence, the mass of 25 moles of acelylene is 650 grams
Use the formula, Q= mcT
Q= heat
m= mass= 1.900Kg= 1.900 x 10^3 grams
c= specific heat= 3.21
T= 4.542 K
Q= (1.900 x10^3g)(3.21)(4.542K)= 14.6 Joules.
Answer:
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Explanation:
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Answer:
% = 11.11%
Explanation:
To get the %m/m of any solution we should use the following expression:
%m/m = m solute / m solution * 100
we have the mass of solute, but not the mass of solution, however this can be calculated. solution is made using solute and solvent so:
m solution = 25 + 200 = 225 g
Now that we have the mass of solution, we can calculate the %:
%m/m = 25 / 225 * 100
%m/m = 11.11%
This is the %m/m of this solution
