Carbon-14 has a half-life of 5730 years. How much carbon-14 will remain in a 100 g sample after 11,460 years ( 2 half lives)?

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

When balancing a chemical equation:

If you add 5.00 ml of 0.100 m sodium hydroxide to 50.0 ml of acetate buffer that is 0.100 m in both acetic acid and sodium acetate, what is the ph of the resulting solution? acetic acid: ka = 1.8. x 10-5