Search & Filtering
How many oxygen atoms are present in 2.5 moles of acetic acid, CH3COOH?
Show that simple harmonic motion y(t) = C1 cos ωt + C2 sin ωt can be written as:
a. y(t) = A sin(ωt + ϕ0)
b. y(t) = A cos(ωt + ϕ1)
A particle moves with a displacement function 12.5+t^2, calculate the acceleration of the body
If 80cm cube of methane (CH4)diffuses through a porous membrane in 20 seconds while 50cm cube of gas Q diffuse through the same membrane in 25 seconds.Calculate the molecular mass of gas Q
A populations consists of the following five values: 2, 3, 5, 7, 10.
List all possible sample of size 3.
To what temperature must a given mass of nitrogen at 0oC heated so that both its volume and pressure will be doubled?
8) How many positive integers less than 1000 have at least one decimal digit equal to 9?
The average weight of 25 chocolates bars selected from a normally distributed population is 200 g with a standard deviation of 10 g. Fight the point and the interval estimates using 95% confidence level
how much heat does 23.0 g ice cube absorb as its temperature increases from "-17.40" C to 0.00? Assume the specific heat of ice is 2.03 J/g C is this endothermic or exothermic
Convert the following concentrations of aqueous solutions.
1.) 35.0% HCI(aq) m FW (HCI)=34.46 g/mol
2.) xKF =0.102 m MW(H2O)=18.02 g/mol
3.) 2.50 m KNO3(aq) xKNO3 MW(H2O)=18.02 g/mol
4.) 1.17 M H2 SOA(aq) N H2SO4 used as an acid to form Na2SO4
5.) 1.73% Pb(aq) ppm
6.) 956 ppm Cu(aq) %(w/w)
7.) 1200 pbb Ca(aq) ppm
8.) 7.97 ppm Mg(aq) ppb
