Calculate the amount of heat needed to melt 18.8 of solid hexane (C6H14) and bring it to a temperature of -55.5 degrees Celsius . Be sure your answer has a unit symbol and the correct number of significant digits.

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

What’s the scientific notation for the number 6,840,000,000

Consider the reaction: n2(g) + o2(g) ? 2no(g) kc = 0.10 at 2000oc starting with initial concentrations of 0.040 mol/l of n2 and 0.040 mol/l of o2, calculate the equilibrium concentration of no in mol/l how would this be done?