The specific heats and densities of several materials are given below:
material specific heat (cal/g·°c) density (g/cm3)
brick 0.220 2.0
concrete 0.270 2.7
steel 0.118 7
water 1.00 1.00
calculate the change in temperature produced by the addition of 1 kcal of heat to 100 g of steel.

a. 84.7°c
b. 37.0°c
c. 1.43°c
d. 1.18°c

An aqueous solution of potassium hydroxide is standardized by titration with a 0.194 m solution of hydrobromic acid. if 25.2 ml of base are required to neutralize 24.2 ml of the acid, what is the molarity of the potassium hydroxide solution? m potassium hydroxide

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

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.