The nurse is receiving the ABG taken on room air for a client who has developed renal failure. The nurse expects which of the following results to be true?
1) pH > 7.45
2) PCO₂ > 45 mm Hg
3) PO2 < 75 mm Hg
4) HCO₃ < 22 mmol/L
5) spO2 < 85