Recent content by Moe*

Ok that makes a lot of sense but instead of a clear dissociation what if u had a Cu + HNO3...> how do u know exactly which reaction is correct (Cu(No3)2 +2NO2 )/ Cu(NO3)2 +2No2 +2H20 with the HNO3=4HNo3 for balancing..?

I don't really get how chemical rxns are formed...sad but Le true If you have the compound Na_{}2CO3 dissolved in water how do u know what's formed? B)How do u know soluble it is/if it is an acid or base?

Homework Statement THe human lungs can operate w a pressure differential of abt 1/20 of an atmosphere. If a diver uses a snorkle for breathing, about how far below the water level can they swim? Homework Equations P=P(i) + pgh where p is ro, density. The Attempt at a Solution...

You want to make an acetic acid/acetate buffer, pH 5.6, with a volume of 250 mL, and a final concentration of ([AcOH] + [Aco-]). You may only use acetic acid and sodium acetate( no strong acid or base). How many mL of glacial acetic acid would be needed( d=1.05g/mL)?

Your right it does work, i guess I entered in the wrong units when i answered the question( m/s instead of cm/s).

thank you... and sorry about the long response

for the the equations posted its supposed to be V subscript x= wAsin(wt + phi) and x(t) = (2.00cm)cos(5t - 4pi)

_{}b]1. Homework Statement [/b) The position of a 39.8 g oscillating mass is given by the equation x(t)= (2.00cm)cos(5t- 4.00\pi) where t is in seconds. Determine Velocity at t= 0.250s M= 39.8 g T= 1.2575 rad/s K= 9.95e-1 N/m initial postion= 2 cm Homework Equations V_{x}=...

Energy/ work problem set(last question!) Homework Statement A 53.5 g ice cube can slide without friction up and down a 33.0° slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 12.0 cm. The spring constant is 22.0 N/m. When the ice cube is...

If a person drank methanol, they would go blind, and their breathalyser analysis (in units of mg/100 mL blood) would be in error. Its reading would be?