Will upvote every answer! multiple choice question!
which is true about models in science?
a-models are accurate enough for the phenomena they represent.
b-models only present macroscopic versions of the submicroscopic.
c-models explain phenomena but are not good for predicting events.
d-models are used throughout science although they are not always accurate.

The grooves or folds of the brain are called

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?

Which statement best describes the he properties of iconic compounds ?