are chemical and physical properties of the new substance the same or diffrent after a chemical reaction

When examining features on the ocean floor, like a volcano, how would it appear? severely eroded not eroded at all only somewhat eroded barely eroded compared to land volcanoes Approximately what percentage of the world's rock record is attributed

You are producing magnesium oxide by the reaction 2 Mg + O 2 > 2 MgO. If you start out with 6 moles of magnesium, how many moles of oxygen will you need? How many moles of magnesium oxide will you produce?

How many moles are there in 125 grams of water?

Which of these is the best definition of a fuel cell? a small container that holds a source of energy a solar cell that captures light energy and converts it into electricity a voltaic cell that uses the oxidation of a fuel to produce electricity a

What is activation energy for the forward reaction represented in the energy diagram? answers 200 kJ +350 kJ +150 kJ +250 kJ

Action - reaction forces don't cancel each other. A. True B. False

An equilibrium is dynamic. True False

In a lab, a student dissolves 6.9 g of sodium chloride (NaCl) in 125 g of water (H2O). What is the molality concentration of the solution?

Audrey is driving 50 miles in 2 hours what is her average speed?

Water has a specific heat of 4184 J / (kgK) how much energy is needed to increase the temperature os a kilogram of water 5C?