|A titanium ore contains rutile (TiO2) plus some oxides of iron and silica. When it is heated with carbon in the presence of chlorine gas, TiCl, is formed. TiCla is a liquid and is distilled
from the
mixture.
TiO2 (s) + C(s) + 2 C12 (g) → TiCl4 (g) + CO2(g)
When 19.4 grams of the ore is heated with carbon and chlorine, 20.5 mL of TiCl4 is
recovered.
(TiCl4: Density = 1.73 g/mL; bp. 136°C, mp. -24 °C).
A) If the typical yield of the reaction is 85.0%, assuming all TiO2 in the ore reacts,
what is the mass of TiO2 in the titanium ore?
B) what is the mass percent of TiO2 in the ore?

What is the molarity of a solution that is prepared by adding 57.1 g of toluene (c 7 h 8 ) (density = 0.867 g/ml) to a 250 ml volumetric flask, and then filling to the mark with benzene (c 6 h 6 ) (density = 0.876 g/ml)?

Margaret wants to make an orange flavored drink by stirring powdered drink mix into a glass of water. she doesn't like drinks that have small clumps of powdered solid in them, so she wants the drink to be a perfect solution. what factors should margaret not consider when deciding how much powder to add to her glass of water?

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.