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A scientist wants to make a solution of tribasic sodium phosphate, Na3PO4 , for a laboratory experiment. How many grams of Na3PO4 will be needed to produce 425 ml of a solution that has a concentration of Na^+ ions of 1.40 M? Express your answer numerically in grams.
a container has a mass of 78.91 grams when empty and 92.44 g when filled with water. the density of water is 1.000
task 1acidity of carbonyl compoundsa find ka values for and order the following componds in order of acidity most
reacted with 0.0040 mol NaOH (very strong base) and then brought up to a volume of 1.0 liter with water. What is the pH of the resulting solution?
What is the pH at the point in a titration at which 20ml of 1.0M KOH has been added to 25ml of 1.0M HBr
calculate the activation energy for diffusion for a system where the diffusion coefficient doubles its value from 700k to 1200k. R=8.314J/molk.
If this arsenic is present as arsenate, AsO4^3-, what mass of sodium arsenate would be present in a 1.10L sample of drinking water that just meets the standard
How many milliliters of a 0.56 M HCl solution do you need to obtain 0.0046 mol of HCl?
In each of the following pairs which compound would you expect to have the higher standard molar entropy and WHY
The mass percent of an element in a compound is the mass of the element (total mass of the element's atoms in the compound) divided by the mass of the compound
How many grams of solute are needed to prepare the following solutions? 1. 135.0mL of 22 % (w/v) glucose (C6H12O6) 2. 60mL of 4.6 % (w/v) (KCl)
What pH will would measure for these solutions immediately? What would be the pH after the solutions equilibrate with the atmosphere
What is meant by 'excited state' electron configuration. Using the complete electron configuration format, write a reasonable excited state configuration for Calcium atom
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