Astudent measures the mass and volume of a piece of aluminum. the measurements are 25.6 grams and 9.1 cubic centimeters. the student calculates the density of the aluminum. what is the percent error of the student’s calculated density of aluminum?
(1) 1% (3) 3%
(2) 2% (4) 4%

What is the molecular formula of a hydrocarbon with m+ = 166? (write the formula with no subscripts, e. g. c4h10.) what is the sum of rings and double bonds in this compound?

Bohr's model could only explain the spectra of which type of atoms? single atoms with one electron single atoms with more than one electron bonded atoms with one electron bonded atoms with more than one electron

The diagram below shows a cell placed in a solution. a cell is shown placed inside a beaker. it is labeled cell. the solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution. only water is allowed to move in and out of the cell. what will most likely happen to the cell? it will expand as water moves out of it. it will shrink as water moves out of it. it will expand as water moves into it. it will shrink as water moves into it.