Question

ourse Home <AC-LO 68 Item 3 3 of 4 > Another component of acid rain is nitric acid, which forms when NO,, also a pollutant, reacts with oxygen and water according to the simplified equation ANO. (B) + O2(e) + 2H 0(1) -+ 4HNO3(aq) The generation of the electricity used in a medium-sized home produces about 17 kg of NO, per year. Part A Assuming that there is adequate O, and H, O, what mass of HNO, in kg, can form from this amount of NO, pollutant? Express the mass to two significant figures and include the appropriate units. m Value kg Submit Previous Answers Request Answer * Incorrect; Try Again; 18 attempts remaining You need to convert the given mass of NO, to units of moles, and then determine the number of moles of HNO, that can be formed based on the stoichiometric relationship depicted in the chemical equation. Then, convert the number of moles of HNO, to its corresponding mass The molar mass of a substance is used to convert between mass in grams) and the number of moles. Next > Provide Feedback Q Search Search

Answer 1

Answer:

Explanation:

A mole ratio is ​the ratio between the amounts in moles of any two compounds involved in a chemical reaction. The mole ratio can be determined by examining the coefficients in front of formulas in a balanced chemical equation

Step 1: calculate the moles of NO2

Given,

mass = 17 kg = 17000 g

[ note: 1 kg = 1000 g ]

molar mass of NO2 = 46.0055 g/mol

we know,

moles = mass given / molar mass

moles of NO2 = ( 17000 g / 46.0055 g/mol ) = 369.52 mol

Step 2: Calculation of  moles of HNO3

4 NO2(g) + O2(g) + 2 H2O(l) -----> 4 HNO3 (aq)

According to the reaction:

4 mol of NO2 produces 4 mol of HNO3

So, 369.52 mol of NO2 will produce = (4 mol of HNO3 / 4 mol of NO2 ) × 369.52 mol of NO2 = 369.52 mol of HNO3

Step 3: Calculation of HNO3 produced

we get moles of HNO3 that can be produced = 369.52 mol

Mass of HNO3 produced =( moles × molar mass ) = ( 369.52 mol × 63.01 g/mol ) = 23283 g

the mass of HNO3 produced in kg = 23283 g × (1 kg / 1000 g) = 23.283 kg

Hence, the mass of HNO3 produced from the amount of NO2 ≈ 23 kg