Why is sima layer found beneath the sial layer?.

An electron is moving northward in a magnetic field. the magnetic force on the electron is toward the northeast. what is the direction of the magnetic field?

This equation indicates that the reaction gives off heat. What is this type of reaction called? 2C4H10 + ? O2? 8CO2 + 10H2O + heat a. an exothermic reaction b. an endothermic reaction c. absorption reaction d. precipitation reaction

Urea (CH4N2O) is a common fertilizer that can be synthesized by the reaction of ammonia (NH3) with carbon dioxide as follows: 2NH3 (aq) + CO2 (aq) →CH4N2O (aq) + H2O (l) In an industrial synthesis of urea, a chemist combines 135.

Calculate the Molarity of 89.94 g NaCl is dissolved in 1249 mL of solution. e

Can you evaluate gas systems and determine the outcome of changed conditions

What is a comet? tell in a short and easy answer

In calcium fluoride, what is the closets noble gas that each ion becomes?

Americium-241 is used in some smoke detectors. it is an alpha emitter with a half-life of 432 years. how long will it take in years for 45.0 % of an am-241 sample to decay?

What is the purpose of forming a scientific hypothesis? It starts a plan to test your idea It provides the answer to your investigation It allows you to prove your idea is correct

N2 + 3h2 2nh3 how many moles of hydrogen are needed to completely react with two moles of nitrogen?