What is the amount (mol) of pure substance in 10.7 g of aluminum? Assume the molar mass of aluminum is 26.98g/mol

How many moles are in 7.2 x 10^23 carbon molecules? (*round to the nearest hundredth and include the unit "mol c" after your number) question 6 options:

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer