Question

What mass of sodium phosphide would be needed to react fully with 5.4x1025 formula units of strontium oxide?

Answer 1

You have to convert 5.4 * 10^25 formula units to grams and then to moles

You have to divide by Avogadro's number (6.023 * 10^23) to get the number of grams of Strontium oxide

and then divide by the molar mass of Strontium Oxide to find the number of moles

You also need the balanced reaction between sodium phosphide and strontium oxide

\(\sf 2Na_3P + 3SrO \to Sr_3P_2 + 3Na_2O\)

so for every 3 moles of SrO, you would need 2 moles of Na3P to react

so use that ratio to calculate how many moles of Na3P would react and then find the molar mass of Na3P. Multiply the number of moles with the molar mass to find the mass of sodium phosphide that would react.

Answer 2

thanks

Answer 3

If you want me to check your answer or if you want to work through it step by step, I can do that too