Question

Please help fast!! I need someone to see if my answers are correct! If any are wrong please let me know what the correct answers would be and how to get that answer!
1. how many moles of sodium chloride are in 28 grams od NaCl?

A. .265 mole NaCl
B. .856 mole NaCl
C. .479 mole of NaCl
D. 1.2 mole NaCl <my choice

2. 734 grams of lithium sulfate (Li2SO4) are dissolved to make 2500 mL of solution what is rhe molaratiy?

A. 2.67 M
B. 4.56 M
C. 3.89 M <my choice
D. 1.78 M

3. how many grams of CaCl2 would be dissolved in 3.0 L of a 0.50 M solution of CaCl2?

A. 250 g CaCl2
B. 166.5 g CaCl2
C. 113.65 g CaCl2
D. 98 g CaCl2 <my choice

4. Suppose you had 58.44 g of NaCl and you dissolved it in exactly 2.00 liters. The molarity if the solution would be 0.5 M

true <my choice
false

5. I would need 22g of NaOH to make a 3.0 M solution using 250 mL of solvent.

true <my choice
false

6. Identify the solute:
you have a .0195 M solution made from using 6.5 g of solute and 3 L of solvent. Identify the solute by solving for molar weight.

A. the solute is NaCl because the molar weight is 58.43 g/mol <my choice

B. the solute is H2SO4 because the molar weight is 98.06 g/mol

C. the solute is CaCl2 because the molar weight is 111.11 g/mol

Answer 1

Yeah all of them are right :)