The half life of tritium is 12.3 years. How much sample will remain if you start with 425g of tritium that is found after 4 half lives?

Which statement describes how phase changes can be diagrammed as a substance is heated? the phase is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the phase is on the x-axis. the time is on the y-axis and the temperature is on the x-axis. the temperature is on the y-axis and the time is on the x-axis.

Embryos of different species look very similar, which shows that the organisms share a ancestor.

Melissa is interested in her family tree and how her family has changed over its many generations. melissa probably more closely resembles