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A certain compound is made up of three chlorine atoms, one phosphorus atom, and one oxygen atom. What is the chemical formula of this compound?
What is the similarity in these diagrams? The sodium ion and the neon atom are isoelectronic (have the same electron configuration).
calculate the change internal energy (E) for a system that is giving off 45.0kJ of heat and is performing 855J of work on the surroundings.
At 1 atm, how much energy (kJ) is required to heat 65.0 g of H2O(s) at -20.0 degrees C to H2O(g) at 135.0 degrees C?
A sample of sodium reacts completely with 0.426 kg of chlorine, forming 702 g of sodium chloride. What mass of sodium reacted?
The density of aluminum is 2.70 g/cm3 and the density of chromium is 7.19 g/cm'.If equal masses of aluminum and chromium are transferred to equal volumes of water in separate graduated cylinders.
A 200. mL air sample collected at 35°C has a pressure of 550. torr. What pressure will the air exert if it is allowed to expand to 425 mL at 48°C?
A tightly sealed 5.0 L flask contains argon at 69.0 deg. C and 781 mm Hg. The flask is heated until the pressure is doubled. What it the temperature of the gas.
Perform the following mathematical operations, and express each result to the correct number of significant figures. 0.19*6.022*10^23
what is the chemical equation that describes both these reactions? Please give the chemical equations of what happens in this situation
If the average human body discharges 536 g of CO2 per day, how much NaOH is needed each day for each person in the spacecraft? Answer in units of mol.
calculate the ph of buffer solution made from .20 M HC2H3O2 and .050 M C2H3O2 that has an acid dissociation constant for HC2H3O2 of 1.8*10-5.
The mass of Earth is 5.974 ô°€ 1024 kg. Assume that Earth is a sphere of diameter 1.28 ô°€ 104 km and calculate the average density of Earth in g/cm3.
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