How much energy (in calories) is needed to heat 16 cm3 of fat from room temperature (25 ∘C) to its melting point (35 ∘C)? The specific heat of fat is 0.45 cal/(g⋅∘C), and the density of fat is 0.94 g/cm3.

Use the standard enthalpies of formation for the reactants and products to solve for the δhrxn for the following reaction. (the δhf of c2h4 is 52.26 kj/mol, co2 is -393.509 kj/mol, and h2o is -241.818 kj.) c2h4 (g) + 3o2(g) 2co2 (g) + 2h2o(g) δhrxn = the reaction is .

Explain which atom l or m is more stable and why

There are main groups in the modern periodic table of elements