Find the mass(grams) in 2.60 mol of lithium ?

Answer/explanation :

To calculate the number of mass, we use this formula

Number of mole = mass / molar mass

Since we are given the number of mole

Number of mole = 2.60mol

Mass = ?g

Molar mass of Li = 6.941g/mol

2.60mol = mass / 6.941 g/mol

Mass = 2.60 * 6.941

= 18.0466g

Therefore, the number of mass is 18.0466g

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

particle   p is an electron and particle q is a neutron