How many grams of oxygen are formed when 6.21 moles of koh are formed?

99.4 g of O are formed in 6.21 moles of KOH

Explanation:

KOH → Potassium hydroxide

1 mol of KOH has 1 mol of K, 1 mol of O and 1 mol of H

Therefore, 6.21 moles of KOH have 6.21 moles of O

Let's convert the moles to mass: 6.21 mol . 16 g/1 mol = 99.4 g

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