Quicklime, CaO, is an important substance used in making mortar. What kind of bonds are present in this compound?

Ionic bond

Explanation:

The main component of quicklime is calcium oxide, whose chemical formula is CaO.

Ca is a metal with 2 electrons in its valence shell.

O is a nonmetal with 6 electrons in its valence shell.

Ca and O form a ionic bond, in which Ca loses 2 electrons and O wins 2 electrons, so that both obey the octet rule.

a boiling water reactor does not boil the water. a pressurized water reactor boils the water faster. a pressurized water reactor is heated directly by the core. a pressurized water reactor does not use fission.

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.