C i think i got this off of usa test prep in class
The systematic name of Mg(NO3)2 is magnesium nitrate. If you were confused, there are two of the nitrate because magnesium has a charge of 2+ while just one nitrate has a 1- charge. They would have to cancel out because it is an ionic compound.
Temperature is the average kinetic energy of the particles of matter. the hotter something is the more kinetic energy it has. ... temperature heats up the particles they have more kinetic energy and move and bounce into each other and spread out.
The temperature that the balloon will expand to 3.50 l is 463.56 K
<em><u> calculation</u></em>
by use of Charles law formula
that is V1/T1 = V2/T2 where;
V1 = 2.25 l
T1= 298 k
V2= 3.50 l
T2=?
make T2 the subject of the formula T2 =(V2 xT1) /v1
T2= (3.50 l x 298 K) /2.25 L = 463.56 K
Answer:
Heat released =811.68kcal
Explanation:
2 CO(g) + O2(g) → 2 CO2(g) ΔH=-135.28kcal
for this type of question 1st balance the chemical reaction and use unitry method.
From the above balanced equaion it is clearly that,
2 mole of CO reacts with 1 mole of O2 and we have sufficient amount of oxygen means excess amount.
and also for complete consumption of 2 mole of CO, ΔH=-135.28 kcal
for complete consumption of 12 moles of CO2 ΔH=
Heat released =811.68kcal
