Calculate the molecular formula for the following:
A: empirical formula CH, molar mass = 78 g/mol
B: empirical formula NO2, molar mass = 92.02 g/mol
C: 49.5 g C,5.15 g H,28.9 g N,16.5 g O by mass, m
What weight of dextrose, C6H12O6, dissolved in 2000 grams of water, will raise the boiling-point to 102.04C at one atmosphere pressure?-ΔT = (Kb) m
where
ΔT = change in boiling point of the solvent
... solution were evaporated o dryness.
Suppose the molar mass of KCl is 74.55 grams per mole.
a) How would heating the solution affect the mass of KCl remaining? ... ( would it make it saturated???
Please dont tell me the whole I can help you but giving you the answer does nothing for you comment because to be honest I dont care.Im 2 weeks away from graduating and I have a 76 C in that class and
A solution of vinegar is 5.10% by mass acetic acid in water. Assuming the density of the solution is 1.00g/ml, what is the pH?
A hint was given saying that the mm of acetic acid is 60.05 g/mol and ka
when 49.5 J of heat was transferred to 7.3 g of iron at 22 degrees celius the temp. of the iron increases to 37 degrees celcius. What is the specific heat capacity of iron in J/g degrees Celcius?-Conv
here are the questions:
a.15.7 g NaCl in 100.0 g H2O
b.20.0 g CaCl2 in 700.0 g H2O
c.3.76 g NaOH in 0.850 L H2O-Molality is defined as moles of solute per kilogram of solution. To get the moles of sol
actinoid contraction is greater from elementto element than lanthanoid contraction.why?-because of the poor shielding effect of the 5f orbitals in actinoids than the 4f orbitals in lanthanoids
Lets begin with the information we want and the information we have.
We want: -The number of atoms of oxygen in 16.00 grams of water (H2O)
We have: - Ratio of oxygen atoms in each molecule of water
First you need to convert 2 lbs to kg of mercury using:
1lb =0.4536kg according to Google.
That makes 0.91 kg of mercury.
Then convert kg to g by multiplying by 1000.
Then divide by the density to en
1. Consider the following reaction: Zn (s) + Cu2+ (aq)Zn2+ (aq) + Cu (s). Which of the following gets oxidized?
(Points : 1)Zn (s)
Cu2+ (aq)
Zn2+ (aq)
Cu (s)
2. Which statement best describes the fl
It depends entirely on how big your equipment is.
If youre just doing a lab experiment where youve got a beaker of salt water and a battery, theres nothing to worry about.(Ive done that often.)
If y
So, this is a question from a lab were currently doing:
if you want to reduce the strength of 100 mL of 10 N NaOH to 3N, how much water would you need to add?
Thanks in advance-N1V1 = N2V2
(10) (100
