Question 7 If the concentration of sodium carbonate in water is 12.8 ppm, what is the molarity of Nazco.(aq)? The molar mass of NazCo, is 106.0 g/mol. Assume the density of the solution is 1.00 g/mL. a) 8.28 x 10-6 M 3 b) 1.21 x 104 M c) 1.36 x 10-3 M d) 0.136 M e) 0.121 M

If 2.00 grams of an unknown DIPROTIC acid (H2A) is titrated with 34.0 mL of 1.35 M NaOH, what is the molar mass (g/mol) of the diprotic acid? H2A+2NaOH⟶2H2O+Na2AH2A+2NaOH⟶2H2O+Na2A (Hint: See equation below in which mm is molar mass (units: g/mol), m is mass (unit: g), and mol isnumber of moles (unit: mol)). mmacid=macidmolacidmmacid=macidmolacid Molar Mass =  ___________   g/mol (input the numeric value only!) Remember: use correct significant figure rules. Significant figures always matter in Chemistry!

Hi I'm having difficulty in finding how many grams of solute are in this questions, thank you.

If 22.22mL of a 1.50 M Ni(NO3)2 solution is diluted to exactly 250.0mL, what will be the concentration of the dilute solution?

Calcium nitrate  (Ca(NO3)2 ; MM =164.0878 g/mol)) dissolves in cold water to the extent of 266 g per 100. mL.  What is the concentration (mol/L) of nitrate ions in this solution? Ca(NO3)2 -> Ca+2 + 2 NO3-

Calculate the molarity of each of the following solutions. 0.500 mole of urea (CH4N2O) in 2.50 × 102 mL of solution

What volume of each of the following bases will react completely with 24.50 mL of 0.900 M HCI? (a) 0.100 M NaOH 4.0 221 (b) 0.0500 M Ba(OH)2 4.0 441 (c) 0.250 M KOH 4.0 0.0882 mL X mL X mL

The legal limit for blood alcohol for MD and VA drivers is 0.08. This is 80mg of ethanol per 100ml of blood. What is the molarity of ethanol in a person at this legal limit?

1. What mass of solute would you need to make each of the following aqueous solutions? Show your calculations. a) 100.0 mL of 1.25 mol/L sodium iodide, Nal(aq) b) 200.0 mL of 0.100 mol/L ammonium chloride, NH,CI(aq) c) 500.0 mL of 2.25 mol/L glucose, C.H1;O(aq) d) 50.0 mL of 0.200 mol/L sodium sulfate, Na:SO.(ag)

If 0.4350 g  of sodium oxalate, Na2C2O4, requiresof a 41.71 mL  KMnO4 solution to reach the end point, what is the molarity of the  KMnO4  solution?