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A solid block of exactky 100.0 cm 3 has a mass of 153.6g. Determine its density. Will the block sink or float on water?
The Rb-Sr data given below are for whole-rock samples from amphibolite metamorphic facies of theLewisian gneiss complex in Scotland (Moorbath et al., 1975), and the Sm-Nd data are for whole-rocksamples from granulite metamorphic facies of the same..
Calculate the amount of water in liters that would have to be vaporized at 40 C (approximately body temperature) to expend the 2.5 x 10^6 calories of heat generated by a person in one day (commonly called sweating).
Under certain condition for the reaction A ? B, ?H = 14.2 kJ and ?S = 27 J/K. At what temperature in K is the reaction at equilibrium?
CaC2 (s) + 2H2O (l) → C2H2 (g) + Ca(OH)2 (aq) If 32.0 g CaC2 are consumed in this reaction, how many moles of H2O are needed?
Which set of atoms is correctly arranged in order of increasing electronegativity (lowest electronegative atom listed first)?
Crystalline potassium bromide has a rock salt structure and a density of 2.75 g/cm^3. Calculate its unit-cell edge length.
The activation energy for the formation of HCl from its elements: H2 (g) + Cl2 (g) → 2 HCl(g) is 155 kJ mol-1. How much faster will this reaction occur at 200°C versus at 100°C?
A sample of diatomic gas has a density of 0.002061g/ml at 1.8 atm pressure and 25.0°C. identify the gas
calculate the change in internal energy for a system that is giving of 25.0 kJ of heat and is changing from 12.00 L to 6.00L in volume at 1.50 atm pressure.
Calculate the mass of nitrogen dissolved at room temperature in an 94.0 home aquarium. Assume a total pressure of 1.0 and a mole fraction for nitrogen of 0.78.
Calcium phosphate, silicon dioxide, and coke may be heated together in an electric furnace to produce phosphorus, as shown in the following equation: 2Ca3(Po4)2+6SiO2+10C=6CaSiO3+10CO +P4
find calories and joules lost when 75.0 g of water H20 cools from 86.4 degrees celsius to 2.1 degrees celsius.
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