How many milliliters of calcium, with a density of 1.55 g/ml, are needed to produce 76.4 grams of calcium fluoride in the single replacement reaction below? be sure to show the work that you did to solve this problem. unbalanced equation: ca + hf > caf2 + h2

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

d.) circle motion requires a force to give it a centripetal acceleration.