How many moles does 13.3 g of cu contain?

The answer is:

There are 0.209 moles of Cu in 13.g of Cu

Why?

To calculate how many moles does a sample of any element has, we need to use its atomic mass

We are working with Copper (Cu), so we need to find its atomic mass to calculate how many moles does 13.3 g of Cu contains.

So, calculating we have:

We have that there is 1 mol per 63.54 grams of Cu.

Now, converting we have:

We have that there are 0.209 moles of Cu in 13.g of Cu

Have a nice day!

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