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A balloon expands from 0.0100 L to 0.450 L against an external pressure of 10.00 atm. How much work is done in joules?  101.3 J = 1 L · atm

What is the enthalpy change (in kJ) of a chemical reaction that raises the temperature of 250.0 mL of solution having a density of 1.25 g/mL by 7.20°C? (The specific heat of the solution is 3.74 J/g-K.)

A [w] gram sample of an unknown material, at 100.0 Celsius is placed in a coffee cup calorimeter with [x] grams of water at an initial temperature of [y] Celsius. The final temperature at thermal equilibrium is [z] Celsius.  Calculate the specific heat of the sample in Joules per gram degree Celsius.  Input only numbers do not input units. 

The specific heat capacity of liquid mercury is 0.14 J/g-K. How many joules of heat are needed to raise the temperature of 5.00 g of mercury from 22.0°C to 57.0°C?

Calculate the wavelength, in nanometers, of light having a frequency of  [x]

How many planes appear in the figure?

Find the common difference d and the nth term an of the arithmetic sequence with these terms. 3rd term is 16; 8th term is 51

Find the nth term an of the geometric sequence. 2, -6, 18, -54, 162, . . .

is an angiogram invasive or non- invasive?  

what is ischemic pain?