Retail
entrepreneur
Fast food
(honestly its important that if you want to get a job and not go to college to know people and to make connections)
Explanation:
For number 9. the answer is 668.23255199999
For number 10. the answer is 1029.7634968
For number 11. the answer is 856.7084
For number 12. the answer is 10.37559999999
Answer:
mass is 4.57 g
Explanation:
Ca(OH)₂ solution consists of Ca(OH)₂ solute molecules and solvent and we are asked to find the mass of Ca(OH)₂ in the solution
number of moles of Ca(OH)₂ is - 0.0787 mol
molar mass of Ca(OH)₂ is - 58.093 g/mol
we can use the following equation
number of moles = mass of Ca(OH)₂ / molar mass of Ca(OH)₂
rearranging the equation
mass of Ca(OH)₂ = number of moles x molar mass
mass = 0.0787 mol x 58.093 g/mol = 4.57 g
mass of Ca(OH)₂ is 4.57 g
Answer:
V = 20.97 L
Explanation:
Given data:
Mass of nitrogen = 23.4 g
Pressure of gas = 750 mmHg (750/760 = 0.99 atm)
Temperature of gas = 28°C (28+273= 301K)
Volume of gas = ?
Solution:
First of all we will calculate the number of moles of gas.
Number of moles = mass / molar mass
Number of moles = 23.4 g/ 28 g/mol
Number of moles = 0.84 mol
Now we will calculate the volume:
PV = nRT
V = nRT/P
R = general gas constant = 0.0821 atm.L/mol.K
V = 0.84 mol× 0.0821 atm.L/mol.K× 301 K / 0.99 atm
V = 20.76 L/0.99
V = 20.97 L
Answer:
You would use the second formula! you can tell because you have an initial volume and a second volume (after blowing it up).
