Answer : The half-life of the compound is, 145 years.
Explanation :
First we have to calculate the rate constant.
Expression for rate law for first order kinetics is given by:
where,
k = rate constant = ?
t = time passed by the sample = 60.0 min
a = let initial amount of the reactant = 100 g
a - x = amount left after decay process = 100 - 25 = 75 g
Now put all the given values in above equation, we get
Now we have to calculate the half-life of the compound.
Therefore, the half-life of the compound is, 145 years.
Answer:
17.18 moles of NaCl are in 2,719 mL of a 6.32 M solution.
Explanation:
We have:
Molarity of the NaCl solution = 6.32 M
Volume of the NaCl solution = 2,719 mL =2,719 × 0.001 L= 2.719 L
1 mL = 0.001 L
Let the moles of NaCl be n.
17.18 moles of NaCl are in 2,719 mL of a 6.32 M solution.
Answer:
Ionic bonding is the complete transfer of valence electron(s) between atoms and is a type of chemical bond that generates two oppositely charged ions. By losing those electrons, these metals can achieve noble-gas configuration and satisfy the octet rule. ...
Explanation:
Answer:
Vapor pressure of solution = 111.98 Torr
Explanation:
Colligative property to apply: Lowering vapor pressure
P° - P' = P° . Xm . i
P°, vapor pressure of pure solvent
P', vapor pressure of solution
Xm, mole fraction of solute
i, Van't Hoff factor.
Let's determine the Xm.
Moles of solute = mass / molar mass → 34.2 g / 58.45 g/mol = 0.585 moles
Moles of solvent = 375 g / 18 g/mol = 20.83 moles
Mole fraction = 0.585 mol / 0.585 mol + 20.83 mol → 0.0273
Let's replace the data in the formula:
118.1 Torr - P' = 118.1 Torr . 0.0273 . 1.9
118.1 Torr - 6.12 Torr = P'
Vapor pressure of solution = 111.98 Torr
