How many number of each element 3Fe+4H20

U have a lead ball with a mass of 420 g. The density of lead is 10.5 g/cm3. What is the volume of the ball?

Describe why heat moves from one object to another

A mineral that has no particular planes of weakness in its lattice structure, so it does not break along particular planes. what happens when this mineral is stuck? a: destruction b: fracture c: rearrangement d: cleavage

What happens when a gamma ray is emitted from nucleus of an atom

Which tools would sara use to find an irregularly shaped object's mass and volume? a meter stick, a ruler, and water a meter stick, a balance, and water a balance, water, and a ruler a balance, water, and a beaker

What are elements and how do they differ?

Write the structire of the salt that forms when diethylamine is mixed with hydrochloric acis

The heat of combustion of propane, C3H8, is 2220 kJ/mol. The specific heat of copper is 0.385 J/g°C. How many grams of propane must be burned to raise the temperature of a 10.0 kg block of copper from 25.0°C to 65.

Which is an example of Temporal Isolation? A. Flowers that bloom in different months. B. Birds that have different mating calls C. Fruits flies that mate in different locations. D. Squirrels that have different fur colors

A chemical reaction can start when enough activation energy is added to the reactants. Do you think the activation energy for chemical reactions in living things is high or low / Explain your answer