Quantitative observations include numerical data. Ex: 32 degrees, 10 inches, etc.
Answer:
The answer to your question is 3.5 moles of I₂
Explanation:
Data
moles of I₂ = ?
moles of KI = 7
Balanced chemical reaction
2KI ⇒ 2K + I₂
Process
To solve this problem use proportions and cross multiplication. Use the coefficients of the balanced chemical reaction for this proportion.
2 moles of KI --------------------- 1 mol of I₂
7 moles of KI -------------------- x
x = (7 x 1) / 2
-Simplifying
x = 7/2
-Result
x = 3.5 moles of I₂
Answer:
divide 10.0g by each reactant's respective molar mass then divide that number by its coefficient in the balanced reaction. the smaller of the two numbers indicates the limiting reactant - it’s Al
Answer : 0.026 moles of oxygen are in the lung
Explanation :
We can solve the given question using ideal gas law.
The equation is given below.

We have been given P = 21.1 kPa
Let us convert pressure from kPa to atm unit.
The conversion factor used here is 1 atm = 101.3 kPa.

V = 3.0 L
T = 295 K
R = 0.0821 L-atm/mol K
Let us rearrange the equation to solve for n.



0.026 moles of oxygen are in the lung
Answer:
Sugar can be obtained by evaporation.
Filtering wont work because sugar is soluble in water thus will mix to form one layer.