Which is easy to observe the physical properties or chemical properties of a object

Why are the very lowest mass stars unable to fuse helium in their cores?

What are the simplest ions of hydrogen? Show their reaction with water.

The three end stages of stars are Red Giant Phase, Second Red Giant Phase and White Dwarf Phase correct?

There are two different compounds of sulfur and fluorine.

A girl needs hellpp! What is the most specific classification of Ca (NO3) 2 A) atom B) compound C) molecule D) element

When metals react with nonmetals, an ionic compound generally results. what is the predicted general formula?

Why could the Bohr model not predict line spectra for atoms other than hydrogen?

Cryolite, Na3AlF6 (s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. Balance the equation. 1.) Balance the equation - AlO3 (s) + NaOH (l) + HF (g) - ->Na3AlF6+H2O (g) 2.) If 17.5 kilograms of Al2O3 (s), 51.

The volume, in liters, of 538 g of CO2

What are two types of cold air masses that influence the weather in North America? Name them and describe their humidity.