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An experiment shows that a 153-mL gas sample has a mass of 0.171 g at a pressure of 761 mm Hg and a temperature of 32oC. What is the molar mass of the gas? R=0.0821 L atm / mol K
A 285- flask contains pure helium at a pressure of 750 . A second flask with a volume of 470 contains pure argon at a pressure of 716 .If the two flasks are connected through a stopcock and the stopcock is opened, what is the partial pressure of h..
Calculate the molar solubility of lead thiocyanate in .900M KSCN ,when the Pb(SCN)2 has a Ksp value =2.00X10^-5, Calculate the molar solubility of MX (Ksp rate =1.27X10^-36) in pure water.
How much energy is dissipated as heat, which is exchanged btwn the system and the heat-sink?C. What is the delta U for the above process?
Find out how many total moles of gas are produced If a sample has 2.10 mL of nitroglycerine (density = 1.592 g/mL) is detonated?
Atomic orbitals of carbon relative to methane in a cubic frame of reference.
evaporated the water from NaOH extracts prior to adding acid?
suppose new element with atomic number 120 is discovered.if some isotopes of this element have 122 nuetrons and some have 124 neutrons,what can you infer about the atomic mass of the element.
A solution is made by mixing 8.00 (millimoles) of and 1.00 of the strong base. What is the resulting pH?
What is the molarity of 2500. mL of a solution that contains 160. grams of NH4NO3?
An automobile gasoline tank holds 35 kg of gasoline. When the gasoline burns, 88 kg of oxygen is consumed, and carbon dioxide and water are produced.
The concentration of carbon in a carbon-metal alloy is found to be 4.73x10^1 kg/m3. It is also known that the concentration of carbon in wt% in the alloy is 1.318x10^0 .
Calculate ?H for the reaction 2C(s) + H2(g) ? C2H2(g) given the following reactions and their respective enthalpy changes
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