452g of calcium nitrate is mixed with 5.8 x10^23 FU's of aluminum sulphate. what is the concentration of the aluminum nitrate solution made its volume is 2.00 L

The fact that the total amount of energy in a system remains constant is a(n)

Suppose that a certain fortunate person has a net worth of $71.0 billion ($7.10×1010). if her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?