For a van der waals gas, πt= a / vm2. calculate δumfor the isothermal expansion of nitrogen gas from an initial volume of 1.00 dm3to 44.31 dm3at 298 k. (the default units for umare kj mol-1)

How many moles of kci are produced from 2.50 moles k

Which one of the following is an oxidation-reduction reaction? naoh + hno3 --> h2o + kno3 naoh + hno3 --> h2o + kno3 so3 + h2o --> h2so4 cacl2 + na2co3 --> caco3 + 2 nacl ch4 + 2 o2 --> co2 + 2 h2o al2(so4)3 + 6 koh --> 2 al(oh)3 + 3 k2so4

The concentration of ionic substances is important for the heart to beat. your heart responds to electrical impulses that travel through heart cells that are made up mostly of water. which properties of ionic compounds are important to support this function? solubility in water conductivity crystalline melting point