Question 4 (16 points) A reaction was performed by adding 2.15-g of calcium fluoride, CaF2, into 50.0-mL of a 0.75-M sodium
hydoxide solution. As a result, 1.50-g of calcium hydroxide, Ca(OH)2, was produced.
1 CaF2 (s) + 2NaOH(aq) - 2 Naf (aq) + 1 Ca(OH)2 (s)
a. Calculate the number of moles of CaF2
Molar Mass of CaF2 = 78.074 grams/mole

Fission of uranium-235 products energy and a. isotopes of smaller elements b. isotopes of larger elements c. lighter isotopes of uranium d. heavier isotopes of uranium

1) describe the physical layout of the ocean floor ? 2) explain how the dumbo octopus swims differently than other octopus species and why this would be an advantage in the aphonic zone . 3) why are the types of organisms that live at each underwater hot vent so dramatically different ?

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy