Chemistry Answers

what is the poh of a 7.2 x 10-8 m blood sample

how and why the decay of Uranium 238 and Technetium–99m are both considered spontaneous even though the time and rate of decay are different.

A 0.240g of a compound of oxygen and element X was found by analysis to contain 0.960g of X and 0.144g of oxygen

1. Calculate the percentage composition by weight

2. Calculate from the above data, three(3) possible weight for X relative to oxygen

NH4NO3(s) → N2O(g) + 2H2O(l)

In a certain experiment, 156 g of ammonium nitrate is decomposed. Find the mass of each of the products formed.

Calculate the concentration of urea (NH2CONH2) a non-electtrolyte that has an osmotic pressure of 30.0 atm at 293.15 K (Hint: Use 0.08206 as the value of R)

The energy associated with a material’s phase change is called:

a 10.0L cylinder of gas is stored at room temperature (20.0c) and a pressure of 1800psi if the gas is transferred to a 6.0L cylinder at what temperature would it have to be stored in order for the pressure to remain at 1800 psi

Which of the following combinations of quantum numbers is not allowed?

A. n = 3, l = 2, ml = -1, ms = -1/2

B. n = 2, l = 1, ml = -1, ms = -1/2

C. n = 2, l = 0, ml = 1, ms = +1/2

D. n = 3, l = 1, ml = 0, ms = +1/2

I belive it's c but im not so sure

a gas occupies a volume of 300cm3 at a temperature of 27 degree Celsius what's is it's volume at 54 degree Celsius when the pressure is constant

write the balanced redox equation of isopropyl alcohol and potassium dichromate.