Which of the following is a synthesis reaction? 2S + 3O2 2SO3 2Na + 2H2O 2NaOH + H2 2H2O2 2H2O + O2 CaCl2 + F2 CaF2 + Cl2

Which of these statements are not true about a chemical reaction rate? A) Temperature does not affect the reaction rate. B) Temperature can decrease the reaction rate. C) The amount of reactants can increase the reaction rates.

A. describe where to look on the periodic table to find Elements which have similar reactivity and other properties. B. explain why they have similar properties C. name three elements that have those similarities.

What types of substances dissolve in water and isopropanol

The force between two objects, each of charge - Q is measured as + F when the objects are separated a distance 2d apart. If the charge on only one object is tripled, determine the new force between them:

Which of the following metals is most reactive? sodium copper calcium aluminum

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?