What is the empirical formula for a compound if a sample contains 3.72g of P and 21.28g of Cl?

How does changing the size and number of objects in a collision affect a collision

A food web is a graph showing how each organism is able to eat another organism. a list of the strongest predators. a graphic representation of all possible energy pathways through an ecosystem.

Helium (He), oxygen (O), carbon (C), and selenium (Se) are all nonmetal. Using the periodic table, which pair of these nonmetal has the most similar properties

What is conserved in physical changes

Did any conductor have a different effect on the light bulb than the others? Explain.

23 Which term identifies the half-reaction that occurs at the anode of an operating electrochemical cell? (1) oxidation (3) neutralization (2) reduction (4) transmutation

Which of the following is true? A) Gas atoms subjected to electricity emit bright lines of light. B) Gas atoms absorb white and emit a continuous spectrum of light. C) Gas atoms under high pressure emit dark lines against a continuous spectrum.

What common household element can, over time, reduce airflow, insulate components, reduce heat exchange or even cause the system to hang or reboot?

Clouds that form at an elevation of 3 kilometers will most likely be composed of A) raindrops B) ozone C) ice crystals D) sleet

Describe how glacial erosion influenced the topography of Ohio.