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A sample of oxygen gas (O
2
) has a volume of
9
.0 L and a pressure of
2
.0 atm. What is the new
pressure if the volume is decreased to
3
.0 L?
How many moles of Fe are in 210 L of Fe
The following set of lead determinations on separate aliquots of a pooled blood serum were reported: 103,106,107 and 114 meq/ L. One of the values appears suspect. Should the suspected be retained or discarded at 95% confidence level?
One of the reactions used to inflate automobile air bags involves sodium azide
(NaN3). The balanced equation will be: 2NaN3(s) → 2Na(s) + 3N2(g). Determine the mass of N2
produced from the decomposition of 100.0 g of NaN3.
Learning Task 2
Write the equilibrium constant expression for each of the following reactions.
1. H2(g) + I2(g) ⇌ 2HI(g)
2. 3O2(g) ⇌ 2O3(g)
3. 2CO2(g) ⇌ 2CO(g) + O2(g)
4. CH3COOH(aq) + C2H5OH ⇌ CH3COOC2H5(aq) + H2O(l)
5. AgCl(s)
⇌
Ag+
(aq) + Cl-
(aq)
Express the concentration of solution in % w/v containing 12 g sodium chloride and 50 ml of water.
5.0 L of 0.4 M H2SO4 contains how many moles?
Good day
In a laboratory pot experiment, what is the allowed or standard weight in mg.kg-1 of each of this Cadmium, selenium, and silicon to be added to the pot experiment.
By applying solubility guidelines,state which of the following compounds will precipitate in water
1 cobalt (ll) hydroxide
2 sodium nitrate
3 Ammonium phosphate
4 potassium chloride
5 none of the above
what is the poh of a 7.2 x 10-8 m blood sample
