Glucose Dissociation In Water
Some chem questions i need help with?
the molality of the glucose in a 1.0 molar glucose solutino can be obtained by using which of the following?
a. volume of the oslution
b. temp of the solutin
c. solubility of glucose in water
d. degree of dissociation of glucose
e. desnity of the solutin
2. the radioactive decay of C (14 on top, 6 on bottom) to N (14 on top and 7 on bottom) occurs by the process of
a. beta particle emission
alpsha partice emission
c. positron emission
d. electorn capture
e. teutron capture
3. when 70 mL of 3.0 molar Na2CO3 is added to 30 mL of 1.0 molar NaHCO3 the resulting concentration of Na+ is
a. 2 M
b. 2.4 M
c. 4.0 M
d. 4.5 M
7.0 M
4. what is the mole fration of ehthanol, C2H5OH in an aqueous solution in which the ethanol concetnration is 4.6 molal?
a. .0046
b. .076
c. .083
d. .20
e. .72
i need help with these, not only the answer but also an explanation, if you can only or know how to do one, then please show me how, thanks
1 a as molality is concerned with volume rather than mass of solvent
2 c 6 to 7 on the bottom equates to proton gain
3 c, 70+30=100ml, 100/1000=.1: 3+1=4 so =4Molar
4 a, 4.6/1000ml
easy
Lec 17 | MIT 5.111 Principles of Chemical Science, Fall 2005
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