In order to calculate the enthalpy of the reaction, we first calculate the heat released using the given formula.
Q = mc<span>ΔT
Q = 1000 x 4.184 x (35.65 - 24.85)
Q = 45187.2 J = 45.2 kJ
Now, we determine the moles of methane that were burned.
Moles = mass / Mr
Moles = 1.11 / (12 + 4)
Moles = 0.07
The enthalpy of a reaction is the energy released per mole, so the enthalpy in this case is:
</span>ΔH = 45.2 / 0.07
ΔH = 645.7 kJ/mol
same family or group called Alkali metals
Answer:
can you please list the options it gives u
Answer:
Molarity = 0.08 M
Explanation:
Given data:
Mass of ZnCl₂ = 4.89 g
Volume of water = 500 mL (500 mL× 1L/1000 mL= 0.5 L)
Molarity of solution = ?
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
Number of mole ZnCl₂:
Number of moles = mass/molar mass
Number of moles = 4.89 g/ 136.3 g/mol
Number of moles = 0.04 mol
Molarity:
M = 0.04 mol / 0.5 L
M = 0.08 M