In a refinery a heat exchanger is used to cool liquid benzene from 170 of to 120 of. assume negligible heat losses to the surroundings. how many pounds of cooling water are required to cool 1000 lbm/hr of benzene if the water enters at 80 of and leave at 100 of? the heat capacity of liquid benzene is given by

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

Glucose (c6h12o6) is an important biological molecule. (round the answer to nearest hundredth.) what is the percent by mass of carbon in glucose?

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent