In which two ways does a balanced chemical equation model the law of conservation of mass?
A. The total mass of the reactants equals the total mass of the
products.
B. The total mass of the metals involved equals the total mass of
nonmetals.
C. The reactants are the same substances as the products.
D. The same numbers and types of atoms appear on both sides of
the equation.

what is the question?

35. a insulated cylinder of solid gold (k 310 kw/m-k) of radius v2 m and height 5 m is heated at one end until the temperature at each point in the cylinder is given by w(r, y, z) (30 z2)(2-(r2+ y2). determine the rate of heat flow across each horizontal disk given by z 1, z 2, and z 3, identifying which has the greatest rate of heat flow across it.

explanation:

i only know number one that’s a galaxy