Archeologists near the Dead Sea in 1998 reported the discovery of a substance made from collagen that they believe ancient people used as glue. A sample of newly prepared collagen exhibits 15.2 disintegrations per minute per gram (15.2d/min/g) of carbon. The 14C decay rate for the sample of ancient glue was found to be 5.60d/min/g. What is the age of the glue. Disintegration of 14C is a first order process with a rate constant 1.209 x 10-4 year-1. a. 8000yrs. b. 7985yrs. c. 8437 yrs. d. 6575yrs. e. 10002yrs.

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

Gusing the milligrams of ascorbic acid you entered above, the ratio of total sample volume to aliquot volume, and the total milligrams of the vitamin c tablet that you dissolved, calculate the mass of ascorbic acid in the vitamin c tablet for each trial. do this by scaling up to find the amount (mg) of ascorbic acid in your 250 ml flask. enter your calculated mass of ascorbic acid in the vitamin c tablet, for each trial. be sure to enter your calculated mass in the corresponding order that you entered your milligrams of ascorbic acid. the milligrams of ascorbic acid you entered for entry #1 previously should correspond to the mass of ascorbic acid that you enter for entry #1 here.

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?