chem21to30.py

Created by thabo
Created on June 03, 2024
1.04 KB
"""
21.The abbreviation is(M)
and the formula is moles = 
molarity × (Volume).

22.What is the % (w/v) 
concentration of a solution 
containing 120 grams of solute in 
4000 mL of solution?
  3.0%

23. 24 g salt in 2000 mL water, 
salt is the (Solute) and water is
the(solvent).

24.What is the molarity of a 
solution prepared by dissolving
0 mol NaCl in enough water to
make 1.50 L of solution?
  2.33M

25.How many moles of HCl are
present in 75.0 mL of a 0.200 M
solution?
  0.0150M

26.How many mL of 0.105 M 
AgNO3 are needed for an 
experiment that requires
0.00510 mol of AgNO3?
  48.6 mL

27.Calculate the concentration
in ppm of a pollutant that
has been measured at 450 mg 
per 150 kg of sample.
  3.0ppm
  
28.A 50.0 mL sample of a 
6.0 M solution of HCl is 
diluted to 200. mL. 
What is the new concentration?
  1.5m
  
29.How many mL of 16 M NH3 
are needed to prepare 2.00 L
of a 2.00 M solution?
  250 mL
30.What is the molarity of a
solution prepared by dissolving
5 mol NaCl in enough water 
to make 2.0L of solution?
  2.5M
"""