\( HCl + NaHCO _ { 3 } \rightarrow NaCl + CO _ { 2 } + H _ { 2 } O \)

Question 8 A 1.22 L sample of a 3.52 M KCl solution is diluted to a volume of 4.00 L . What is the molarity of the diluted solution?

\( 2 \mathrm{NaOH}(\mathrm{aq})+\mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2}(\mathrm{aq}) \longrightarrow 2 \mathrm{NaNO}_{3}(\mathrm{aq})+\mathrm{Ca}(\mathrm{OH})_{2}(\mathrm{~s}) \) What volume (in mL\( ) \) of a 0.387 M NaOH solution is required to completely react with 29.7 mL of a \( 0.540 \mathrm{M} \mathrm{Ca}\left(\mathrm{NO}_{3}\right)_{2} \) solution ?

What pressure does 0.390 g of helium gas exert if it occupies 863 mL at \( 18^{\circ} \mathrm{C} \)

How many moles of oxygen gas occupy 675 mL at \( 29^{\circ} \mathrm{C} \) if the oxygen gas was collected over water at 843 mmHg ? (Vapor pressure of water at \( 29^{\circ} \mathrm{C}=30.04 \mathrm{mmHg} \) )

At STP, magnesium is burned in oxygen. If 21.6 g of magnesium metal competely reacts, what volume of oxygen gas is required? \( \ldots \mathrm{Mg}(\mathrm{s})+\ldots \mathrm{O}_{2}(\mathrm{~g}) \rightarrow \) _ MgO(s)