2.If Au-198 has a half-life of 10 days, how much of a 1000 g sample remains after 30 days.

Write two balanced equations 1. dissolving of solid sodium hydroxide in water 2. the reaction of sodium hydroxide solution with hydrochloric acid

Layers of rock containing fossils, like the layers illustrated here, are most likely composed of rocks.

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )