4. thorium-234 has a half-life of 24.1 days. what percentage of the original thorium-234 in a sample will remain after 144.6 days?

3.) for each of the following compounds, draw the major organic product of reaction with hcl or naoh and circle whether the starting materials and products will be more soluble in organic solvent or water benzoic acid + hcl: benzoic acid + naoh: oh benzoic acid water/organic water organic fluorenone hс: fluorenone + naoh: fluorenone water/organic water/organic веnzocaine + hci: benzocaine + n»oh: h2n benzocaine water/organic water organic o=

Draw the structure for 5-isopropyl-2-methyl-3-nonene

Light waves can move through , but they travel fastest when they move through a(n) .