A certain metal M forms a soluble sulfate salt M2(SO4) Suppose the left half cell of a galvanic cell apparatus is filled with a 450. mM solution of M2(SO4)3 and the right half cell with a 4.50 M solution of the same substance. Electrodes made of M are dipped into both solutions and a voltmeter is connected between them. The temperature of the apparatus is held constant at 30.0°C. Required:
a. Which electrode will be positive?
b. What voltage will the voltmeter show?

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.

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Fossil fuels are organic compounds that are made from