In chemistry-what is a catalyst

Magnetism easily separates what mixture? A). Sand and glass B). Sand and iron C). Sand and clay D). Sand and aluminum

When a metal reacts with a nonmetal, the metal will ... a) lose electrons and form a positive ion b) gain electrons and form a negative ion c) gain protons and form a negative ion d) lose protons and form a positive ion

What color does red litmus paper turn in an acid base and neutral solution?

Could a 3 ion of aluminum be made by adding three protons to an aluminum atom

How can you describe the location of hafnium (Hf, atomic number 72) on the periodic table? Choose all that apply. (A) Transition metals (B) Noble gases (C) Group 6, Period 4 (D) Group 4, Period 6

Ocean constitutes most of ___ of water a) Evaporation b) Precipitation c) Condensation d) Transpiration e) Sublimation Don't choose a random letter.

In the reaction, Zn + HCl-> ZnCl2 + H2, 25 grams Zn are reacted with 17.5 grams HCl. How many grams of H2 will be produced? A. 0.382 g of H2 B. 0.479 g of H2 C. 0.7865 g of H2 D. 0.484 g of H2

Is nail varnish soluble?

What is the periodic trend for atomic size from top and bottom in a group? From left to right in a period?

Which planets' orbits is the belt located between the main asteroid belt?