Pls the hubble space telescope, one of mankinds greatest advances in understanding space, was launch in 1990. hubble is a space-telescope that orbits earth above the atmosphere. how can a space-telescope such as hubble provide more valuable data than a traditional ground-telescopes used by astronomers? a) closer to objects in space b) more expensive and better technology c) atmosphere distorts and blocks the light d) secret technology not used in ground-telescopes

1. suppose a reaction mixture, when diluted with water, afforded 300 ml of an aqueous solution of 30 g of the reaction product malononitrile [ch2(cn)2], which is to be isolated by extraction with ether. the solubility of malononitrile in ether at room temperature is 20.0 g/100 ml, and in water is 13.3 g/100 ml. what weight of malononitrile would be recovered by extraction with (a) three 100-ml portions of ether and (b) one 300-ml portion of ether? suggestion: for each extraction, let x equal the weight extracted into the ether layer. in part (a), the concentration in the ether layer is x/100 and in the water layer is (30 x)/300; the ratio of these quantities is equal to k 20/13.3.

Calculate the number of moles of ethane in 100 grams

Acompound has a molecular weight of 12.124 atomic mass units and the empirical formula c3h40. what is the molecular formula of the compound?