Instruments pour lesquels il faut prendre 2 lectures pour chaque mesure ( ce qui nécessite de doubler l’incertitude de l’instrument)

Calculate - analysis of compound composed of iron and oxygen yields 174.86 of fe and 75.14g of o. what is the empirical formula for this compound?

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Which process transfers heat from inside earth to its surface? convection currents in mantle pulling away of tectonic plates drawing in of tectonic plates convection currents in crust