Calculate the volume (mL) of 1.0 M potassium carbonate (K2CO3) needed to prepare 5.0 g of the COBALT pigment. This is where the balanced chemical equation comes in. You should be able to relate the moles of pigment to the moles of K2CO3, and from that calculate the volume of 1.0 M K2CO3 solution needed.

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