During her summer vacation, sherry decides to go to the park to do some rollerblading (1). while rollerblading, she leaves her purse in her car (2). when comes back to her car, she realizes her lips are very dry (3). to remedy this, she gets her lip balm out of her purse (4). when she takes the cap off to apply it, some of it drips out of the tube and makes a mess all over her hands (5). a little irritated, she then goes to the bathroom and cleans the lip balm off of her hands (6).

which sentence from the scenario best shows sherry's lack of understanding about the physical properties of her lip balm?

note: each number represents the sentence that comes before it in the scenario.

Sentence (4) is the correct answer.

Explanation:

Physical properties are defined as the properties that does not bring any change in chemical composition of a substance.

For example, density, volume, mass, shape, size etc are all physical properties.

So, when Sherry opens the cap of her lip balm tube then some of it drips because semi-solid state of lip balm has changed into liquid state due to absorption of heat from the car.

This means that there occurs change in only physical property of the lip balm.

Therefore, we can conclude that sentence from the scenario best shows Sherry's lack of understanding about the physical properties of her lip balm is that when she takes the cap off to apply it, some of it drips out of the tube and makes a mess all over her hands.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

i think it is true since you can test the answer and can use observations to complete it.