The volume of an automobile air bag was 66.8 l when inflated at 25 °c with 77.8 g of nitrogen gas. what was the pressure in the bag in kpa

For this question we can use the ideal gas equation,
PV = nRT
P - pressure 
V - volume - 66.8 / 1000 m³
n - number of moles - 77.8 g/ 28 g/mol = 2.77 mol 
R - universal gas constant - 8.314 Jmol⁻¹K⁻¹
T - 25 °C + 273 = 298 K
substituting these values in the equation 
P x 0.0668 m³ = 2.77 mol x 8.314 Jmol⁻¹K⁻¹ x 298 K 
P = 102.7 kPa

Ithink it is quantity of plants

Since there is the same amount of agn03 in both silver chloride and silver nitrate they produce the same amount of moles. therefore silver chloride produces the same amount of silver nitrate, so your answer is 15.0 moles of silver nitrate. i hope this !