PLEASE HELP ME I NEED ALL THE ANSWERS ASAP
1. 0.1 M solution of copper(II) sulphate CuSO4

2. 0.02 M solution of aluminum sulphide Al2S3

3. 0.180 M solution of sodium hydroxide NaOH

4. 0.006 M solution of magnesium chloride M gCl2

5. 0.082 M solution of sodium sulfate Na2SO4

6. 1.2 x 10^-6 M solution of iron (II) hydroxide Fe(OH)2

7. 2.30 x 10-14 M solution of iron(III) hydroxide Fe(OH)3

8. 0.28 M solution of copper (I) nitrate CuN O3

9. 1.43 M solution of copper (II) nitrate Cu(N O3)2

10. 0.60 M solution of lithium phosphate Li3PO4

11. 0.18 M solution of potassium oxide K2O

12. 0.25 M solution of calcium fluoride CaF2

13. 1.5 x 10^-6M solution of tin(II) nitrite Sn(N O2)2

14. 3.1 X 10^-15 M solution of tin(IV) nitrite Sn(N O2)4

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)

is it a purebred? it looks more like a red nose, but it doesn't have the red could it be a staffordshire bull terrior? unsure if that's the right name for it sorry

level 4 to level 2 : ))

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.