6.
calcium and its compounds, have properties typical of group 2 in the periodic table.
calcium carbonate, caco3, reacts with acids such as nitric acid.
a student neutralised 2.68 g of caco3 with 2.50 mol dm
nitric acid, hno3.
the equation for this reaction is shown below.
caco3(s) + 2hno3(aq) - ca(no3)2(aq) + co2(g) + h2o(1)
the student left the solution of calcium nitrate formed to crystallise. crystals of
hydrated calcium nitrate formed containing 30.50% of h2o, by mass.
calculate the formula of the hydrated calcium nitrate.

Aconductor easily transfer heat

1. why does the same side of the moon always face earthc.the rotational period of the moon is equal to one revolution around earth2. which is greater the moons period of rotation or its period of revolution  b.the moons revolution period around earth3.what was the major accomplishment of the apollo missions  c.sending the first human into space4. which of these space missions involved the deployment of lunar roversa. voyager 15. which scientists are going to explore next on kepler-186fd. evidence of existence of life6.which mission is not going to explore the outside of the solar  systemb.safir7.which technology limit the future of space explorationb. scientist must first develop certain technologies before missions can be completed.