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Calculations using the ideal gas equation

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A balloon contains 0, point, 692, start text, m, o, l, end text of ammonia gas, start text, N, H, end text, start subscript, 3, end subscript, left parenthesis, g, right parenthesis, at 280, start text, K, end text and a pressure of 0, point, 810, start text, b, a, r, end text.
What is the volume, in liters, of the balloon?
Express the answer using 3 significant figures.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
  • an exact decimal, like 0, point, 75
  • a multiple of pi, like 12, space, start text, p, i, end text or 2, slash, 3, space, start text, p, i, end text
start text, L, end text