How is the density of a substance calculated?

Plutonium-239 has a half-life of 24,100 years. How long will it take a 1-kilogram sample to decay to 125 grams?

What is the difference between a dwarf planet and an asteroid?

How many grams of sodium bromide must be dissolved in 400.0 g of water to produce a 0.500 molar solution? A20.0 g B52.18 C2.00 g D20.6 g

Which component of an item has the least mass A. protons B. electrons C. neutrons D. all are the same

How do molecules move at warm temperatures differ from molecules at cool temperatures

If you remove all the particles from a wooden table, what remains

Which of the following is the best description of covalent bonding? 1. Bonding that occurs between elements with similar electronegativities, and with transfer of electrons. 2.

You are asked to smell a solution in a beaker. what is the best way of doing this?

The specific gravity of iron is 7.87, and the density of water at 4.00 ∘C is 1.00 g/cm3. You can use this information to find the density of iron. Find the volume occupied by 4.50 g of iron.

The volume of a gas is 93 ml when the temperature is 91? c. if the temperature is reduced to 0? c without changing the pressure, what is the new volume of the gas?