What is the molarity of a solution that contains 45.0 g of sodium chloride in 0.265 L of a water solution?

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

Determine the empirical formula for succinic acid that is composed of 40.60% carbon, 5.18% hydrogen, and 54.22% oxygen.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?