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- 3. A student neutralized 25.0 cm³ of sodium hydroxide solution with 0,6 student carried out the experiment three times and obtained the following results. Experiment 3 Experiment 1 Experiment 2 Volume of Acid 19.90 17.30 17.40 Used/ cm3 (a) The student calculated the volume of acid used by calculating the average of the volume of acid used in Experiment 2 and Experiment 3. Explain why the first reading was not considered. (b) Calculate the amount (moles) of 0.6 moldm³ sulfuric acid in the average titre value used to neturalise the sodium hydroxide. (c) How many moles of sulfuric acid react with 1 mole of sodium hydroxide? (d) What amount (moles) of sodium hydroxide were there in the 25 cm³ sample?How many grams of HCl are in 250. mL of 0.100 M HCl?If the molecular weight of glycerol is 92.1 g/mole, and its density is 1.26 g/mL. What is the Molarity of Glycerol?
- Which of the following is NOT true of molarity? it is defined as moles solute per liter of solvent it is the most widely used concentration unit in chemistry varies with temperature it is represented by the variable Mhow to I convert 10mg/L (10ppm) of nitrate (NO3-) to molar mass of nitrate? Ç Chapter 10 part 1: concentration units As we have learned throughout this class, water contaminants can be harmful to the human body and the environment. There is an exact amount of how much nitrate can be present in drinking water before it becomes unsafe. The U.S. EPA has a standard of 10 milligrams of nitrate per liter of water (mg/L), which is the same as 10 ppm. Anything at or below 10mg/L is considered to be safe for humans to drink. If we were to consume more than the standard level of nitrate it can cause a lot of health concerns, like weakness, dizziness, and an excessive heart rate. Problem: What is the molar mass of Nitrate at 10ppm? the same problemljust worded differently Nitrate (NO3-) I 1mg/L-1ppm convert 10ppm of (NO3-) into molar mass of (NO3-)Where should heat be applied to a test tube? Bottom of the test tube. Top of the test tube. Middle of the test tube. The point at which the solution is highest in the tube. Anywhere is fine.