Since it is a phase change, use the mHfusion equation.
Answer:
(1) 720 seconds (2) 10800 seconds (3) 17 dozens (4) 1.45 x 
(5) 13.29 moles
Explanation:
(1) 720 seconds
1 minute = 60 seconds
12 minutes = 720 seconds (12 x 60)
(2) 10800 seconds
1 hour = 60 minutes 1 minute = 60 seconds
3 x 60 = 180 minutes in 3 hours
180 x 60 = 10800 seconds in 180 minutes that are in 3 hours
(3) 17 dozens
1 dozen = 12
204 ÷ 12 = 17 dozens
(4) 1.45 x
8.00 moles CO2 x 
= 24.0 moles atoms
24.0 moles x 
= 1.45 x
(5) 13.29 moles
sorry but I'm not fully sure if this one is correct
8 x 
x 
= 13.29 moles
Answer:
3,1,2
Explanation:
3 bc u go get liters
1 because ur going from C3H8 to CO2
2 because ur getting CO2 liters
Answer:
Molecule formula is C8Cl4
Explanation:
Empirical formula of a compound is it's simplest formula while the molecular formula gives the exact number of moles of atoms of the component elements in one mole of the compound.
To calculate the molecular formula;
Step 1:
Write the elements in the compound with their percentage quantities.
Carbon = 33.33%
Chlorine = 100 - 33.33 = 66.67%
Step 2:
Divide both components by its relative atomic mass
C = 12, Cl = 35.5
Carbon 33.33/ 12 = 2.7775
Chlorine 66.67/ 35.5 =1.8780
Step 3: divide both values by the smallest
1.8780 is the smallest
So therefore,
2.7775/ 1.8780 = 1.4790 = ~2
1.8780/ 1.8780 = 1
Empirical formulae = C2Cl
(C2Cl)x = 248.75
(12*2 + 35.5)x = 248.75
(59.5)x = 248.75
x = 248.75 / 59.5
x = 4.18 = 4
Molecular formula = C8Cl4
