(a) (i) Simplify the set [(B - A) U A']'. (3)
(ii) Given the subsets A = [-2,6), B = (-5,3), C = (-1,8) of the set of real
numbers R, find the set AU (B'UC)'.
(
4)
(b) (i) Express (1 + vz) in the form a + bv2, where a and b are integers.
(ii) Express
V2
in the form p + qv2, where p and q are rational numbers.
(1+V2)2
(©) (1) Express 2.534 in the form where p and q are integers and q * 0, in its
a
(3)
lowest terms.
(3)
(ii) Simplify 5V6 - 2724 + V294.​

Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)

Which process transfers heat from inside earth to its surface? convection currents in mantle pulling away of tectonic plates drawing in of tectonic plates convection currents in crust

How many atoms or molecules are there in a mole of a substance?