I NEED THIS ASAP What describes using organisms that were only alive during a specific time period to estimate the unknown age of items?

Group of answer choices

Radioactive dating

Law of superposition

Relative dating

Index fossils

Ineed pls urgent 1-20 in order and fully detail step my step.

Under what conditions will a gas be most likely to exhibit the ideal gas properties predicted by the ideal gas law? 1)high pressures and high temperature, because particles are forced closer together with higher kinetic energy, so intermolecular forces of attraction are weaker 2)high pressure and low temperature, because particles are forced closer together and moving slower, so the volume of the particles is less significant 3) low pressure and high temperature, because particles are spread farther apart and moving faster, so the intermolecular forces of attraction are weaker 4)low pressure and low temperature, because particles are spread farther apart with lower kinetic energy, so the volume of the particles is less significant

Use the equation n2 + 3h2=2nh3 if 8.0g n2 react, how many grams of nh3 will be produced