Answer:
Molecular formula = C₄F₈
Explanation:
Given data:
Empirical formula of compound = CF₂
Molar mass of compound = 200.4 g/mol
Molecular formula of compound = ?
Solution:
Formula:
Molecular formula = n ( empirical formula)
n = Molar mass of compound / empirical formula mass
empirical formula mass = CF₂ = 12+19×2 = 50 g/mol
n = 200.4 g/mol / 50 g/mol
n = 4
Molecular formula = n ( empirical formula)
Molecular formula = 4 ( CF₂)
Molecular formula = C₄F₈
I think it is B, but i am not sure
The total quantity of heat evolved in converting the steam to ice is determined as -12,928.68 J.
<h3>
Heat evolved in converting the steam to ice</h3>
The total heat evolved is calculated as follows;
Q(tot) = Q1(steam to boiling point) + Q2(boiling point to ice) +Q3(freezing to -42 ⁰C)
where;
Q = = mcΔθ
where;
- m is mass, (mass of water = 18 g/mol)
- c is specific heat capacity,
- Δθ is change in temperature
Q(tot) = 2(18)(2.01)(100 - 135) + 2(18)(2.01)(0 - 100) + 2(18)(2.09)(-42 - 0)
Q(tot) = -12,928.68 J
Thus, the total quantity of heat evolved in converting the steam to ice is determined as -12,928.68 J.
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