Wednesday
December 11, 2013

# Posts by peter

Total # Posts: 733

chemistry
1:200 w/v means 1g in 200ml

chemistry
Please help. Concentrated hydrochloric acid is a 38% w/w solution of HCL in water and has a density of 1.18g/ml. How many millilitres of concentrated hydrochloric acid are needed to prepare 500ml of a 1:200 w/v HCL solution? My answer is 2.12ml. I'm not sure if its correct...

math
(x-16)^2=64

life orintation
identify and describe one environmental problem that causes ill health,crises,accidents,and disasters within your community or any other community within south africa or globally

L.o
Limpopo

Organic Chem
Outline a separation scheme for isolating pure isopentyl acetate from the reaction mixture.

physics
A spring whose spring constant is 650 N/m is compressed 0.300 m. What speed (in meters/second) can it give to a 0.300 kg ball when released

Math(Algebra)
Determine whether the pair of lines are parallel, perpendicular, or neither. 1)f(x)=2/3x+1 2)2y+3x=1

chemistry
I don/t know

Geometry
Sorry Steve, you made a major error with your units... the radius of the Earth is around 6378 km not 6378 miles. You are trying to find the distance from the Space Station to the horizon, which would be the point of tangency. The tangent line from the Space Station will form a...

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