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State the Law of Conservation of Matter. How does the Law of Conservation of Matter figure into the simulation? Use how the masses of reactants and products were related after 10 g of calcium nitrate were added to 40 grams of sodium carbonate in the first example. Be specific and use actual values to make your point. Generalize this to all chemical reactions. Was the total mass of reactants always equal to the total mass of products or was the mass of the reactants that reacted equal to the total mass of products formed?
Why did adding more calcium nitrate produce more products to a point, then stop having an effect?
What is the limiting reactant before the stoichiometric amount of calcium nitrate was added? What is the limiting reactant after the stoichiometric amount of calcium nitrate was added? How can you tell from the simulation?
Approximately how many grams of calcium nitrate were required to react totally with 40.0 g of sodium carbonate? How many grams of product were formed at that point? Do your answers appear to obey the Law of Conservation of Matter?
Was it easy to tell when you added the stoichiometric amount of calcium nitrate?
What is the balanced equation? How did you determine it?
53.0 mL of a 1.70 M solution is diluted to a volume of 278 mL. A 139-mL portion of that solution is diluted using 189 mL of water.
What is the initial pH of this buffer? 2. What is the pH of the buffer in question
Determine the mole fraction of sodium chloride(NaCl) in the solution if this solution is formed by mixing 17.0 grams of sodium chloride NaCl in 85.0 grams of Water?
How many grams of KNO3 are needed to make 450 mL of a solution that is to contain 5.50 mg/mL of potassium ion? Calculate the molarity of the solution.
what is the volume in milliliters of 20.0 g of acetone if the density of acetone is .791 g/ml?
Molecules can be as small as a few atoms or as large as thousands of atoms. In 1962, Max F. Perutz and John C. Kendrew were awarded the Nobel Prize for their discovery of the structure of hemoglobin
A student is given four solid samples labeled W, X, Y, and Z. All have a metallic luster. She is told that the solids could be gold, lead sulfide, mica (which is quartz or SiO2), and iodine.
Calculate the pH of the 0.20 M NH3/0.24 M NH4Cl buffer. B)What is the pH of the buffer after the addition of 10.0 mL of 0.10 M HCl to 55.0 mL of the buffer?
Given a restriction enzyme that has a concentration of 50 units/ml but your experiment requires that the concentration be reduced to 2.5 units/ml.
How many litres of NO are produced at STP when 162 g Ag reacts with excess HNO3
Elements in the first short period are limited by the octect rule whereas those in the higher period can expand their valence shells. Describe what this means, account for this phenomenon and give an example of each.
Calculate the molar concentration of uncomplexed Zn2+ in a solution that contains 0.20 mole of Zn(NH3)42+ per liter and 0.0116 M NH3 at equilibrium.
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