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how do you calcalculate a cube of an unknown metal measures 1.61mm on one side. the mass of the cube is 36mg. which of the following is most likely the unknown metal rhodium, cooper, niobium, vanadium, or zirconium and explain why please.
What is the pressure of a gas if you compressed the gas from it's original 500mL at 3.4 torr to a volume of 302mL?
how many grams of carbon dioxide would be produced if 45 grams of C6H12O6 completely reacted with oxygen?
If 8.88 X 10^7 aluminum atoms can fit along a 1.00 inch line, what is the diameter of a single aluminum atom?
How many air molecules are in a 10.0x20.0x10.0 ft room? Assume atmospheric pressure of 1.00atm , a room temperature of 20.0C , and ideal behavior.
A young child grows rapidly, with high levels of cell division and high energy requirements. If you were planning the child's diet, which food groups would you emphasize, and why? Which good groups would you deemphasize, and why?
What is the enthalpy of combustion of this fuel in kJ/mol? The specific heat capacity of water is 4.184 J/g-°C.
calculate the mass of sodium nitrate, NaNO3, required to produce 7.00g of oxygen according to the following reaction:
Platinum has a face-centered cubic crystal structure and a density of 21.5 g/cm3. What is the radius of the Platinum atom?
What is the initial sulfur dioxide concentration (in mol/L or M)?
How many pounds of CO2 are produced from the complete combustion of 1.00 gal of gasoline? Assume that gasoline has the formula C8H18 and has a density of 0.703g/mL.
Radioactive isotopes often occur together in mixtures. Suppose a 190 sample contains , with a half-life of 12 days, and , with a half-life of 4.5 days. If there are initially twice as many calcium atoms as there are barium atoms, what will be the ..
An electric power station annually burns 3.6 107 kg of coal containing 1.8 percent sulfur by mass. Calculate the volume of SO2 emitted at STP.
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