3HNO3 + Na3PO4 -> H3PO4 + 3 NaNO3 how many grams of NaNO3 are made if it required 15.4mL of 0.5 M HNO3 to finish the titration

Which of these conditions most likely produces an unstable isotope?

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.

William has eight more nickels than dimes in his pocket for a total of $2.50. which equation could be used to determine the number of x dimes in his pocket?