How to synthesize 3-ethyl-heptane using acetylene, any alkyl 1 degree or 2 degree bromide up to 5 carbons?

any alkyl imaginable. Plus any solvent, and any reagent common to the beginner organic chem students.
does this description necessarily mean that I have to use all these reagents, or just what I need?

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Limiting reagent question?

To find the limiting reagent for a reaction you must compare TWO quantities, one is the number of moles available, what is the other?

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How many grams of water are in 100 g of the perchloric acid solution?

Hot perchloric acid, a powerful reagent isused to decompose organic material and solubilize them for analysis?
a) how many grams of perchloric acid, HClO4, are contained in 100g of 70. 5% wt aqueous perchloric acid?

b) How many grams of water are in 100 g of the perchloric acid solution?

c) How many moles of perchloric acid are in 100g of solution?

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How do I make an Egg Drop Device using only straws and rubber bands?

I can use only straws and rubber bands, and it can only be 12″x12″x12″.

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Is there a replacement for plastic toilet seat screws?

I have a three year old who boosts herself up on the toilet with a potty chair attachment that has broken 3 seats now. Not the seat, just the plastic screws. Just tonite, she broke 2 more and the seat is entirely detatched.

Does anyone have a quick replacement for these screws? Im willing to try anything because they keep breaking. Thanks.

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