Chemistry
A 1.065-g sample of an unknown substance is dissolved in 30.00 g of benzene; the freezing point of the solution is 4.25 degrees C. The compound is 50.69% C, 4.23% H, and 45.08% O by mass. Info you might need on benzene: Normal Freezing point,degrees C: 5.53 Kf, degrees m^1: 5....
Chemistry
What mass of sucrose, C12H22O11, should be added to 75.0 g H2O to raise the boiling point to 100.35 degrees C? Molal boiling point of water: 0.512 Kb, degrees C m^-1 Answer: 18 g sucrose
chm
Why are the atomic masses listed in the periodic table not whole numbers? Answer Scientists have yet to make the precise measurements. That would be too much of a coincidence. ??>>The atomic masses are average atomic masses. or >>Today's instruments are able to...
chm
How would you classify the following material?swimming pool water homogeneous mixture<<< heterogeneous mixture a pure element a pure compound depends on how many children have been in it
algebra 1
If it is 1/(a-y) = 1/y then cross multiply to get y = a -y solve for y in terms of a.
Math
pace is 400 meters/48 seconds You could use a proportion; 400/48 = x/192
Math -algerbra
Are you just taking the square root of the x? If so: x - square root of x = 12 or is it x = sqrt(x+10) + 2? if so: x -sqrt(x+10) = 2 Square both sides: Then solve.
math
It means when y = 0 then x = 1 0 = 1^2 + b(1) + 1 0 = 1 + b + 1 Solve for b.
Algebra 1
3n - 4n -4 = 1/3(n+4) -n - 4 = 1/3 (n+4) multiply all parts by 3 -3n -12 = n + 4 -4n = 16 n = -4
Chemistry
4.0 g/1mole = .54 g/x mole This is a proportion. Cross multiply to find the answer
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