the half life o fpolonium-210 is 138.4 days. how many milligrams of polonium-210 remain after 415.2 days if you start…
The specific heat of the dilute NaCl solution formed during the neutralization of the HCl is about 2% less than the 4.184 J/k g assumed in the calculation for the molar heat of neutralization of the acid. How will this affect your final result for the heat of neutralization?
Question #1) Refer to the periodic table and state the atomic mass (in amu) of one atom for each of the following nonmetals: carbon,sulfur,selenium and iodine. Question #2) State standard conditions for a gas in Kelvin units and atmosphere Question #3 How many moles of barium metal react to produce 0.100 […]
I am required to write a research proposal that identify a topic on any existing industrial problems, process improvement, syntheses, process economics or marketing economics and write a 3-page research proposal. This proposal will be evaluated on the basis of industrial relevance, methodology, and feasibility. The paper should have an introduction, Hypothesis etc. Industrial existing […]
Use Hessâs Law to find ÎH for the following reactions. Express your answers in kJ/mol of the first reactant on…
You are going to complete several meteorological tests using a large weather balloon. You wish to check the temperature at 3000 meters altitude. You want to make sure the balloon will not burst before it reaches this height. Some calculations are needed. Knowing that the balloon manufacture guarantees the balloon up to 60.0 Liters in […]
CH4(g) + H2O(g)—-> CO(g) + 3 H2(g) Hydrogen can be prepared by reacting natural gas (methane) with water, as shown above….
A studentncombusted 0.500g Al with oxygen according to the reaction 4Al(s)+3O2(g)=2Al2O3(s), What is the limiting reactant? How many moles of Al…
if a mixture of calcium chloride and sodium chloride is 34.72% calcium chloride dihydrate by mass, what mass of sodiu,…
1) Some bacteria are able to harvest light of 1000 nm wavelength. A) What is the energy (in kilojoules) of a mole of 1000 nm photons? B) What is the maximum increase in redox potential that can be induced by a 1000 nm photon? C) What is the minimum number of 1000 nm photons needed […]
