For question 17, thanks

a) Zinc react with hydrochloric acid, it produces zinc chloride which is present in aqueous solution and hydrogen gas.

b) When calcium chloride react with sodium carbonate, it produces calcium carbonate (solid) and sodium chloride (liquid).

c) Sodium hydroxide react with hydrochloric acid, it produces sodium chloride (liquid) and water.

d) When calcium carbonate decompose, it forms calcium oxide which is present in solid form and carbondioxide gas.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.

its first and third is your answer i did the qustion the fourth isnt right