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Molality & Molarity 1.
Calculate the molality of a solution containing 10.8g of ethylene glycol (C2H6O2) in 360g of water.
Mole Fraction 1. Calculate the mole fraction of each component of a solution containing 65 g of ethanol (C₂H6O) in 350g of water.
A solution is prepared by dissolving 20 mL of pure hydrogen peroxide (H₂O2) in enough water to make 200mL of solution. What is the concentration of the H₂O2 solution?
Combustion of an 8.23 mg sample of a compound
gave 9.62 mg of carbon dioxide and 3.94 mg of water.
Analysis of another 5.32 mg sample of the same
compound by the Carius method gave 13.49% mg of
AgCl. Calculate the % composition and empirical
formula.
Industrially, vanadium metal ,which is used in steel alloys,can be obtained by reacting vanadium oxide with calcium at high temperatures:
In one process,1.54×10^3g of V2O5 react with 1.96×10^3g of Ca.
Calculate the theoretical yield of V....
Describe a procedure for making rock candy using sucrose. At 20°C, the solubility of sucrose is 230.9 g/100 g H2O. At 50°C, it is 260.4 g/100 g H2O. At 100°C, it is 487 g/100 g H2O
An 8.00 mg sample of an organic compound was
subjected to quantitative combustion to give 15.33 mg
of carbon dioxide and 9.36 mg of water. The
molecular weight was found to be 46. Calculate the %
composition, empirical and molecular formula of the
organic compound.
If the average temperature of the ocean were to increase, how would this affect the ocean's ability to absorb carbon dioxide?
What would happen to the added KNO3? What would happen if you repeated the procedure, except with sodium chloride (NaCl)?
What happens if the core body temperature is too high?
b. the capillaries move closer to the surface of the skin
a. the blood vessels supplying the capillaries dilate
d. the capillaries constrict
c. the capillaries dilate
A reaction mixture for PCR consists of ____________
b.primers in a limited amount
d. a region complementary to the sequence to be amplified
a. heat unstable polymerase
c. deoxynucleoside triphosphate (dNTPs)
What is the best definition of homeostasis?
b. maintenance of a constant internal environment
c. keeping a constant temperature
a. getting rid of waste
All options are correct except:
c. carbon dioxide is transported to the lungs
a. carbon dioxide is produced in very small quantities in living organisms
b. carbon dioxide is produced by the cells respiring aerobically
d. carbon dioxide is taken in small quantities
