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It is likely that they are looking for a Bohr type model, so concentric rings of electrons around a nucleus of protons and neutrons. You will need to use a periodic table to find the number of protons, neutrons.
Do you need to solve for t? Hint - take logs.
1 mole contains 1.02 x 10^23 molecules. Hence you can calculate the number of moles 1.02 x 10^24 molecules represents. If you calculate the mass in grams of one mole of NaCl from the atomic masses, you can find the answer.
3 sides to a triangle Any more? 64 s on a C B
The sequence (called a homologous series) is methanol, ethanol, propanol, butanol, pentanol... Butanol's molecular formula is C4H10O. There is more than one isomer with this molecular formula. It is difficult to show structural formulae on here. One structural formula with...
What two properties of the solid do you need to know to calculate the density? When you have decided on them think of ways that you could measure them.
"and a carboxylic acid salt (or a carboxylate ion and the metal ion from the base)"... You could name the salt and/or the ions for a more complete answer, but otherwise this looks OK.
Still difficult to decide on the experiment. Perhaps you could give a little more detail. Is the horizontal temp axis at zero volume?