Ommercially available aqueous nitric acid has a density of 1.42 g/mL and a concentration of 16 M. Calculate the mass percent of HNO3 (molar mass = 63.01 g/mol) in the solution.

The mass percent of nitric acid in the solution is 70.99 %

Explanation:

We are given:

Molarity of nitric acid = 16 M

This means that 16 moles of nitric acid is present in 1 L or 1000 mL of solution

Density of solution = 1.42 g/mL

Volume of solution = 1000 mL

Putting values in above equation, we get:

Moles of nitric acid = 16 moles

Molar mass of nitric acid = 63.01 g/mol

Putting values in above equation, we get:

To calculate the mass percentage of nitric acid in solution, we use the equation:

Mass of solution = 1420 g

Mass of nitric acid = 1008.16 g

Putting values in above equation, we get:

Hence, the mass percent of nitric acid in the solution is 70.99 %

out of these options:

ability to burn paper

pure sodium reacting violently with water

the boiling point of water

helium does not tend to react with anything

i would say this is a physical property:

helium does not tend to react with anything

why? :

i said helium does not tend to react with anything because well, it reacts to ! but ability to burn paper, pure sodium reacting violently with water, & the boiling point of water are chemical or

physical properties: the properties of a substance that can be observed without changing the chemical makeup of the substance

chemical properties: properties of a substance relating to the chemical nature and reactivity of the substance

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.