How does the balanced chemical equation show the conservation of matter in this chemical reaction? f2+2nabr-> 2naf+br2 a.)there are fewer na atoms in the reactants than in the products b.)the compound naf is a substance that is different from the compound nabr c.)the number of f atoms in the reactants equal the number of f atoms in the products d.) there are more br atoms in the reactants than in the products also, explain your answer. i dont understand this whatsoever

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

Large helium-filled balloons are used to lift scientific equipment to high altitudes. what is the pressure inside such a balloon if it starts out at sea level with a temperature of 10.0ºc and rises to an altitude where its volume is twenty times the original volume and its temperature is – 50.0ºc ?