A piece of metal (mass = 17.676 g) is placed in 11.00 mL of chloroform (d = 1.498 g/mL) in a 25-mL graduated cylinder. The chloroform level increases to 15.46 mL. The best value for density of this metal from these data is

Which of these equations is balanced? a. H2SO4 + 2Al → Al2 (SO4) 3 + H2 b. 2KCl + Pb (NO3) 2 → 2KNO3 + PbCl2

Monosodium glutamate, known as MSG, is sometimes added to food to enhance flavor. Analysis determined this compound to be 35.5% C, 4.77% H, 8.29% N, 13.6% Na, and 37.9% O.

What Is the mass (in grams) of 7.8 x 10^18 carbon atoms?

Samantha is using a lever to lift a rock. To life the rock most easily, where should she apply force to the lever

Which type of chemical reaction is the corrosion of iron? A. reduction-oxidation C. polymerization B. substitution D. decomposition

Which statement describes the redox reaction that occurs when an object is electroplated? A. It is spontaneous and requires an electric current. B. It is spontaneous and produces an electric current. C.

How are electromagnetic different than all other waves

Find the ratio of speeds of an electron and a negative hydrogen ion (one having an extra electron) accelerated through the same voltage, assuming non-relativistic final speeds. Take the mass of the hydrogen ion to be 1.67*10^{-27} kg.

A type of rock that undergoes changes because of heat and pressure

How many milliliters of a 1.25 molar HCL solution would be needed to react completely with 60 g of calcium metal Ca+2HCl - - > CaCl2 + H2