Answer:
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From electronic configuration valence electron of Nitrogen is 5, oxygen 6x2 which 12 since it involve two molecules , that of is frulorine is 7, and that No2F is 24 which is gotten form adding (5,12,7 ).All resonance structure are as follows
F
.. I ..
: O : N :O:
..
OR : F:
I
N .. : F:
/ \ or I
.. .. N
:O : :O: / / \\
/ / \\
:O : : O:
Answer:
Calories of candy = 5.1 kcal /g
Explanation:
Given data:
Mass of candy = 4.70 g
Change in temperature = 2.46 °C
Specific heat capacity of calorimeter = 40.50 Kj/°C
Calories present per gram = ?
Solution:
Formula
Cal of candy = specific heat capacity × change in temperature / mass
C = c . ΔT/m
C = 40.50 Kj/°C × 2.46 °C / 4.70 g
C = 99.63 kj /4.70 g
C = 21.2 kj/ g
C = 21.2 kj/ g × 0.239 kcal/kj
C = 5.1 kcal /g
Answer:
2.67 M
Explanation:
Molarity, which is the molar concentration of a substance, can be calculated using the formula;
M = n/V
Where;
M = molarity (M)
n = number of moles (mol)
V = volume (Litres)
Based on the provided information in this question, mass of lithium sulfate (Li2SO4) = 734g, volume = 2.5L
Using mole = mass/molar mass
Molar mass of Li2SO4 = 7(2) + 32 + 16(4)
= 14 + 32 + 64
= 110g/mol
Mole = 734/110
Mole (n) = 6.67moles
Molarity = n/V
Molarity = 6.67/2.5
Molarity = 2.668
Molarity of Li2SO4 in the solution is 2.67 M
