IF YOU CAN ANSWER 1&2 AT LEAST IN THE NEXT 10 MIN I WILL AWARD YOU POINTS BUT AL
ID: 822273 • Letter: I
Question
IF YOU CAN ANSWER 1&2 AT LEAST IN THE NEXT 10 MIN I WILL AWARD YOU POINTS BUT ALL WOULD BE GOOD BEING TIMED
1.What is the molar concentration of 0.500 moles of glucose (a sugar) dissolved in a 0.200L solution? The formula for molarity is shown below.
2.What is the salt concentration of a liquid where 7.00 grams of NaCl are dissolved using 25.0 grams of water? Use units of %(m/m).
The formula for % (m/m) is
21.9% (m/m)
4.57% (m/m)
3.57% (m/m)
78.1% (m/m)
28.0% (m/m)
3.Methanol is a type of liquid alcohol. The chemical formula for methanol is CH3OH. When CH3OH(l) is dissolved in water it becomes CH3OH(aq). Is CH3OH a strong electrolyte, weak electrolyte or non-electrolyte when it is dissolved in water?
can't be determined from the information provided.
weak electrolyte
strong electrolyte
non-electrolyte
4.
The solubility limit of glucose in water is 91g / 100mL of water at 25
21.9% (m/m)
4.57% (m/m)
3.57% (m/m)
78.1% (m/m)
28.0% (m/m)
Explanation / Answer
1. 0.5/0.2 = 2.5
2. 7/25 = 28%
3. non electrolyte
4. 0.91 = x / 955
x = 869.05
So 802 g