Answer:
Amount left after 25 days = 12.5 g
Explanation:
Given data:
Mass of sample = 400 g
Half life of sample = 5 days
Mass left after 25 days = ?
Solution:
First of all we will calculate the number of half lives passes in given time period.
Number of half lives = Time elapsed / Half life
Number of half lives = 25 days/ 5 days
Number of half lives = 5
At time zero = 400 g
At 1st half life = 400 g/2 = 200 g
At 2nd half life = 200 g/2 = 100 g
At 3rd half life = 100 g/2 = 50 g
At 4th half life = 50 g/2 = 25 g
At 5th half life = 25 g/2 = 12.5 g
It's a table that has elements private message me I send u a pic of it ...
Answer:
The coefficient of thermal expansion describes how the size of an object changes with a change in temperature. ... In general, substances expand or contract when their temperature changes, with expansion or contraction occurring in all directions.
Answer:
Molecular formula = C₅H₁₀
Explanation:
From the question given above, the following data were obtained:
Empirical formula of compound => CH₂
Molar mass of compound = 70.1 amu
Molecular formula of compound =...?
The molecular formula of a compound is usually a multiple (n) of the empirical formula i.e
Molecular formula = [CH₂]ₙ
Thus, to obtain the molecular formula of the compound, we must first determine the value of n. The value of n can be obtained as follow:
[CH₂]ₙ = 70.1
[12 + (2×1)]n = 70.1
[12 + 2]n = 70.1
14n = 70.1
Divide both side by 14
n = 70.1 / 14
n = 5
Molecular formula = [CH₂]ₙ
Molecular formula = [CH₂]₅
Molecular formula = C₅H₁₀
Thus, the Molecular formula of the compound is C₅H₁₀.
