Pls help! Urgent! The law of conservation of mass states that the mass of the reactants is
the mass of the products.
A. Less than
B. Equal to
C. Greater than

b. equal too

Explanation:

According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants

the objects have the same charge.

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.