Answer:
892 g/mol
Explanation:
Step 1: Given and required data
- Mass of the nonvolatile and a non-electrolyte solute: 11.01 g
- Volume of solution: 158.1 mL = 0.1581 L
- Osmotic pressure (π): 1.91 atm
- Ideal gas constant (R): 0.0821 atm.L/mol.K
- Absolute temperature (T): 298 K
Step 2: Calculate the molarity (M) of the solution
The osmotic pressure is a colligative property that can be calculated using the following expression.
π = M × R × T
M = π / R × T
M = 1.91 atm / (0.0821 atm.L/mol.K) × 298 K
M = 0.0781 M
Step 3: Calculate the molecular weight of the solute
We will use the following expression for molarity.
M = mass of solute / molecular weight of solute × liters of solution
molecular weight of solute = mass of solute / M × liters of solution
molecular weight of solute = 11.01 g / (0.0781 mol/L) × 0.1581 L
molecular weight of solute = 892 g/mol
Answer:
47.5 mL
Solving:
M1 = 4.00 M
V1 = ?
M2 = 0.760 M
V2 = 0.250 L
---
M1 * V1 = M2 * V2
V1 = ( M2 * V2 ) / M1
V1 = ( 0.760 * 0.250 ) / 4.00
V1 = ( 0.190 ) / 4.00
V1 = 0.0475 L
A
Bronsted-Lowry acid is a proton donor (usually hydrogen ion). And a
Bronsted-Lowry base is a proton acceptor (usually hydrogen ion). Consider a
chemical reaction between HCl and NaOH. We have the reaction HCl + NaOH à NaCl + H2O. The
hydroxide ions in the NaOH are bases because they accept hydrogen ions from
acids to form water. And an acid produces hydrogen ions in solution by giving a
proton to the water molecule. Therefore, the answer is d. a Bronsted-Lowry
base.
Im dying at the fact that you put in under ‘Chemistry’, good luck though.
Answer:
223 g
Explanation:
Molar mass Fe = 55.845 g/mol
mass=molar mass* number of moles=55.845*4.00≈223 g