Answer:
q = -6464.9 kJ
Explanation:
We are given that the heat of combustion is ∆H° = −394 kJ per mol of carbon.Therefore what we need to do is calculate how many moles of C are in the lump of coal by finding its mass since the density is given.
vol = 5.6 cm x 5.1 cm x 4.6 cm = 131.38 cm³
m = d x v = 1.5 g/cm³ x 131.38 cm³ = 197.06 g
mol C = m/MW = 197.06 g/ 12.01g/mol = 16.41 mol
q = −394 kJ /mol C x 16.41 mol C = -6464.9 kJ
Answer:
Avogadro's Law; 15.1L
Explanation:
Boyle's Law- Pressure and volume are <u>inversely</u> related, so an increase in pressure= decrease in volume. We see this in the equation P1V1=P2V2.
Charle's Law- Gas expands/increases in volume when temperature increases, so they are <u>proportional</u>. We see this in the formula
.
Guy-Lussac's Law- As temperature increases, pressure increases, so they are <u>proportional</u>. We see this in the formula
.
Avogadro's Law- There are equal amount of volume have an equal amount of moles, so they are proportional. We see this in the formula
.
Plugging in the values based on Avogadro's Law, we'll have:

12.6 = 
12.6 x 1.2 = V2
15.1L =V2
Answer:
Filtration is the best method or seiving to put the drink in a cup while the seed falls on the seiver
Explanation: