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PROJECT CRASHING PROBLEM (all time in Days, all Cost in $): What is the EXACT SEQUENCE of activities to crash, to reduce the project by 4 days, at least cost? Activity Immediate Predecessor Normal Time Crash Time Normal Cost Crash Cost A – 5 4 1000 1400 B – 3 3 800 – C A,B 3 1 600 900 D B 4 2 1600 2000 E C,D 5 3 800 1200 F E 2 1 1300 1400

What volume of 6.0 M HNO3 would be needed to make 500 mL of 0.50 M solution?

A pressure is recorded as 622 torr. What is this pressure in atm?

A solution is made by combining 4.00 g of sugar and 100 mL of water (density = 1.00 g/mL). What is the concentration in % w/w?

Which of the following is the correct Lewis structure for C2H4?

Isotopes differ from each other in what way?

Colloids can be stabilized by emulsifying agents.

If urine has a density of 1.08 g/mL, what would be the mass of a 125 mL urine sample?

Given the following: heat of fusion of ice = 80.0 cal/g; specific heat of ice = 0.480 cal/g; and specific heat of water = 1.00 cal/g. Calculate the amount of heat required to melt 30.0 g of ice at 0°C.

Which of the following gases would diffuse about one-third as fast as helium gas, He?