A student is trying to figure out how many moles of potassium chloride are formed from 4.0 grams of chlorine gas. Which step in the following students work is incorrect?

Step 3 ⇒ incorrect

Given

mass of Cl₂ : 4 g

Required

incorrect step

Analysis

analyze step

Solution

Reaction

2K(s)+Cl₂(g)⇒2KCl(s)

Step 1⇒correct

we determine the moles of Cl₂ by their mass

MW of Cl₂=70.9 g/mol

mol=mass : MW

Step 2 ⇒ correct

From equation, mol ratio of Cl₂ to KCl = 1 : 2, so mol KCl :

Step 3 ⇒ incorrect

Paraphrase

Step 3 ⇒ incorrect

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

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying