#1 Gas Stoichiometry please show work Gas stoichi 1. When heated, sodi bicarbona

Question

#1 Gas Stoichiometry
please show work

Gas stoichi 1. When heated, sodi bicarbonate. Naluco, decomponesvo inoduce ewsbon dioxide, inn lum balanced reaction is is also known as baking soda, is used zs agent when making doughnuts and quick breads. calculate the volume ofco1 produced when?35 NaHCO3 decompose at a temperature of 350°C and a pressure of am. 2. Magnesium is used as a "getter" in ultrahigh vacuum devices to remove traces of oxygen. When an electric current passes through the magnesium, which is present as a thin wire or floton, the oxygen to form magnesium oxide

Explanation / Answer

The balanced chemical equation is given.

2 NaHCO3 (s) -------> Na2CO3 (s) + CO2 (g) + H2O (l)

As per the balanced stoichiometric equation,

2 moles NaHCO3 = 1 mole CO2

Molar mass of NaHCO3 = (1*23 + 1*1 + 1*12 + 3*16) g mol-1 = 84 g mol-1.

Moles of NaHCO3 taken = (mass of NaHCO3 taken)/(molar mass of NaHCO3) = (2.35 g)/(84 g mol-1) = 0.02798 mole.

Moles of CO2 produced = (0.02798 mole NaHCO3)*(1 mole CO2/2 moles NaHCO3) = 0.01399 mole.

Use the ideal gas law:

P*V = n*R*T where P = 1.05 atm, n = 0.01399 mole, T = 350C = (350 + 273) K = 623 K and R = 0.082 L-atm/mol.K.

Plug in values:

(1.05 atm)*V = (0.01399 mole)*(0.082 L-atm/mol.K)*(623 K)

===> V = 0.068066 L = (0.068066 L)*(1000 mL/1 L) = 68.066 mL 68.1 mL (ans).

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