1. Test: Before you begin testing with the 4.5-7.5 paper, list the pH values of the substances below that you found using the 0-14 pH indicator
paper. Then find the pH of each substance with the 4.5-7.5 paper
..5-7.5 pH indicator paper
Material in the tube pH value (0 to 14 paper) pH value (4.5 to 7.5 paper)
Coffee
Milk
Oven cleaner
Saliva (human)
Shampoo
Stomach acid
12010

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

Two nitro no2 groups are chemically bonded to a patch of surface. they can't move to another location on the surface, but they can rotate (see sketch at right). it turns out that the amount of rotational kinetic energy each no2 group can have is required to be a multiple of ε, where =ε×1.010−24 j. in other words, each no2 group could have ε of rotational kinetic energy, or 2ε, or 3ε, and so forth — but it cannot have just any old amount of rotational kinetic energy. suppose the total rotational kinetic energy in this system is initially known to be 32ε. then, some heat is removed from the system, and the total rotational kinetic energy falls to 18ε. calculate the change in entropy. round your answer to 3 significant digits, and be sure it has the correct unit symbol.

The minerals found in bones are deposited by living cells called