Givens
m = 2.26 g
c = 4.19 J/(g * oC)
Δt = 23.5oC - 0 = 23.5oC
hf = heat of fusion for ice = 334 J/g
Equation
H = m*c*Δt + hf * m
H = m*(c*Δt + hf)
Solution
H = 2.26 * (4.19 * 23.5 + 334)
H = 2.26 * (432.5)
H = 977.4 J
Answer:
True
Explanation:
The cordillerian progeny directly depends upon the rate at which the plate is subducting. So, the statement is true.
mass of 1 mole of N is 14g
so mass of 3.45 mole is
3.45 × 14 = 48.3 g
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