# chemdumby

Most popular questions and responses by chemdumby
1. ## 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?

asked on April 26, 2011
2. ## 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?

asked on April 25, 2011
3. ## 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

asked on April 25, 2011
4. ## 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?

asked on April 25, 2011
5. ## 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?

asked on April 25, 2011
1. ## 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...

posted on April 26, 2011
2. ## 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

posted on April 25, 2011
3. ## chemistry

thank u so much!

posted on April 25, 2011
4. ## chemistry

or should it be 5.2596x10^15?

posted on April 25, 2011
5. ## chemistry

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

posted on April 25, 2011