chemistry
calculate the pH of the solution when 25.0ml of 0.0920M HCL is titrated with 0.15ml, 23.0ml, 30.0ml of 0.10M NaOH
algebra 2
find all the zeroes of: x^5-3x^4-24x^3-72x^2-25x+75=0 5x^5-20x^4-40x^3-16x^2-45x+180=0 -3x^5+3x^4+9x^3-7x^2+12x=12 x^3-x^2-13x-13=0 x^3+x^2=15x-15 Thank you for any help...I'm desperate please help :(
Organic Chemistry
Thin Layer chromatography TLC experiment What does it mean when it says with to much sample the spots will tail
statistics
suppose 25% of the urban population is 18 years old or younger. five residents of that city are selected at random find the probability that at least two of the selected five persons are 18 years old or younger. please help me with this question !!!
historty
who was lowell mill strikers
geometry
what kind of geometric figure is an angle bisector
public health
What are the purposes of public health surveillance? How are they implemented and utilized by communities, governmental agencies, and health care organizations or providers?
healthcare
ok thanks that is like the sanitation stage of 1800,s how they practiced using different techniques to help clear diseases.
Chem
Aviation fuel is significantly more expensive per gallon than diesel fuel. Why then is aviation fuel still used in Planes?
fau
The mass of an electron is 9.11\times 10^{-31}~\rm kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31\times 10^{-10}~\rm m, how fast is the electron moving relative to the speed of light? The speed of light is 3.00\times10^8 ~\rm m/s.
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