Blair bought a hutch for her desk that was 23 inches long. The box said that the hutch was 25 inches long. What was the percent error of the hutch?

What is the volume of the fluid in the graduated cylinder with accuracy and measured to the correct degree of precision? 41.2 ml 42.0 ml 41.23 ml 41.89 ml

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?