A2-in-diameter spherical ball whose surface is maintained at a temperature of 170°f is suspended in the mid- dle of a room at 70°f. if the convection heat transfer coefficient is 12 btu/h ft. f and the emissivity of the surface is 0.8, de- termine the total rate of heat transfer from the ball.

Which formula can be used to calculate the molar mass of hydrogen peroxide

Suppose that a certain fortunate person has a net worth of $71.0 billion ($7.10×1010). if her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)