provide a structure for the given compound. ei mass spectrum: two molecular ions of about equal intensity at ������/������=180m/z=180 and 182;

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

Jose and eric were given four samples in lab. the results of their analysis are shown in the table. based on the data they collected, which sample is most likely a metal?

Water undergoes a large change in density at 0 ∘ c as it freezes to form ice. calculate the percent change in density that occurs when liquid water freezes to ice at 0 ∘ c given that