Calculate ΔH for the reaction. Don’t forget to include the coefficients from balancing the equation (Problem #1). Help Please

How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

What energy is it when you flip on a switch on a lamp

To apply in a gold the individual gold atoms are united to each other by means of a metallic bond. how would you use the gold block to determine the atomic radius of a gold atom?