An unknown material has a specific heat capacity of 0.279 J/g*C. If it releases 367 J of energy when the temperature of it is lowered by 28 degrees, how much mass was
present of that material?

Which type of reaction always has an element and a compound as reactants

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm