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August 22, 2014

Posts by chemdumby


Total # Posts: 10

chemistry
If the average quarter weighs 5.67grams, how many atoms of nickel are in a quarter? ie; 91.67%mass/copper 8.33%mass/nickel I took 5.67x0.0833=.47g .47gNi/58.6934=801 atoms nickel? is this right?
April 26, 2011

chemistry
oh sorry :( how many grams of Ni would a person ingest in their lifetime? If a person drank 2L of water a day containing 100ppb Ni
April 25, 2011

chemistry
or should it be 5.2596x10^15?
April 25, 2011

chemistry
If a person were to drink 2L of water a day containing 100ppb Nickel for an entire lifetime (assume 72yrs) I took 100/1x10^-9 x 52596L=5.2596x10^-3? is this right?
April 25, 2011

chemistry
what are the oxidatoin numbers in this chemical reaction Ni+H2SO4=H2+NiSO4? is it Reactants: Ni=0 H=1 SO4=-2? Products:H=1 Ni=2+ SO4=-2? what is being oxidized? reduced? what is the oxidizing agent? reducing agent? is Ni being oxidized and is reducing agent? is H oxidizing ...
April 25, 2011

chemistry
I ended up getting 4.21L of H2 is that right? The steps I took were 25gNi/58.6934=.43mol Ni v=(.43)x(0.0821x1atm/molK)x(298K)/2.5atm=4.21L H2? this doesn't look right...
April 25, 2011

chemistry
using this equation: Ni+H2SO4=H2+NiSO4 how many liters of hydrogen gas at 298degK and 2.5atm could be produced if you react 25 grams of nickel metal?
April 25, 2011

chemistry
thank u so much!
April 25, 2011

chemistry
bob is the balanced equation Ni+H2SO4=H2+NiSO4? I also think it could be 2Ni+H2SO4=H2+Ni2So4? I am confused...
April 25, 2011

chemistry
Nickel2 sulfate is produced when elemental nickel metal is dissolved in sulfuric acid to make nickel2 sulfate. Hydrogen gas is also released in the process. what is the balanced equation for this chemical reaction?
April 25, 2011

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