Answer:
Mass = 58.96 g
Explanation:
Given data:
Mass of CH₄ = 21.5 g
Mass of O₂ = 387.5 g
Mass of CO₂ formed = ?
Solution:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Number of moles of CH₄:
Number of moles = mass / molar mass
Number of moles = 21.5 g/ 16 g/mol
Number of moles = 1.34 mol
Number of moles of O₂ :
Number of moles = mass / molar mass
Number of moles = 387.5 g/ 32 g/mol
Number of moles = 12.1 mol
now we will compare the moles of CO₂ with O₂ and CH₄.
O₂ : CO₂
2 : 1
12.1 : 1/2×12.1 = 6.05 mol
CH₄ : CO₂
1 : 1
1.34 : 1.34
Number of moles of CO₂ produced by CH₄ are less thus it will limiting reactant.
Mass of CO₂:
Mass = number of moles × molar mass
Mass = 1.34 mol × 44 g/mol
Mass = 58.96 g
Answer:it means the cell is an hypertonic or high concentration solution
Explanation: osmosis is defined as movement of water from a region of high concentration to a region of low concentration of water.
Now being in a hypertonic solution means the sorrounding solution in a high concentration of the solute which means water is in low in concentration , so osmotic pressure move water from the cell (which has a relatively higher water concentration )to it's sorrounding which has a lower concentration of water, resulting in the shrinking or crenation of the cells.
Answer: 0.150 m 
will have highest boiling point.
Explanation:
Formula used for Elevation in boiling point :
where
= elevation in boiling point
[tex[k_b[/tex] = boiling point constant
m = molality
i = Van't Hoff factor
A) 0.100 m 
i = 3 as 
concentration will be 
B) 0.250 m 
i = 1 as is a non electrolyte
concentration will be 
C) 0.100 molal 
i = 2 as 
concentration will be 
D. 0.150 molal
i = 3 as 
concentration will be 
E. 0.150 molal 
i = 2 as 
concentration will be 
The solution having the highest concentration of ions will have the highest boiling point and thus 0.150 m will have highest boiling point.
