Chem H

A student measures the mass of a cylinder using a balance. The correct amount of the cylinder had been previously determined to be 49.6 grams. The experimental values are 45.2g, 45.4g, and 45.3g. The students measurements are

The following lists the steps in determining the density of a cube in a laboratory: 1. Measure the mass of the cube with a balance and a record. 2. Measure and record the level of water with a graduated cylinder. 3. Add the cube to the graduated cylinder. 4. Calculate the density of the cube-- what possible error was made in this procedure for calculating the density of the cube?

In an experiment, a student produced 2.5 grams of Sn(O)2. The accepted quantity that should have been produced during the experiment is 2.9 grams of Sn(O)2. What is the percent error?

In 1911 , it was discovered that the mass of an atom is concentrated in a tiny central core with a positive charge. Which scientist is responsible for this discovery?