Apiece of lead has a density of 11.3 g/cm3 and a mass of 282.5 g. what is its volume?

25 cm3
2500 cm3
2.5 cm3
250 cm3

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.

The number of moles of a given mass of a substance can be found without knowing its molecular formula or molar mass. true false