How do I solve for the density of a block of wood that has a mass of 120g and a volume of 200cm3?

Which of the following are isotopes? a U-235, Br-81 b Mg-12, Mn-55 c Cl-35, Cl-37 d H-1, H-1

Use the E0 values of the following elements: Zn, Cu, Pb, and Al. Which element is the most active oxidizing agent?

When 0.2 kg of gasoline undergoes combustion, 18500 kJ of energy are released. Express the heat released, 18500 kJ in calories. (Given 4.184 J = 1 cal)

The empirical formula of a group of compounds is CHCl. Lindane, a powerful insecticide, is a member of this group. The molar mass of lindane is 290.8 g/mol. How many atoms of carbon does a molecule of lindane contain?

Hardness is an example of

How is the energy released by an earthquake related to its moment magnitude?

Suppose you have an Avogadro's number of nitrogen atoms. How many grams does this represent? Enter your answer to one decimal place.

How many moles of gas molecules will be present in 5000 L of air at STP?

Which is the correct way to represent 0.0035 kg by using scientific notation?

Earthquake damage causes two rabbits to be separated from the rest of the rabbits in their large habitat. They have no way to get back to their original habitat. The two rabbits mate with each other.