Why must a measurement include both a number and a unit?

Which of the following is NOT a property of acids? A) Acids turn litmus paper red. B) Acids dissolve many metals. C) Acids have a sour taste. D) Acids have a slippery feel. E) All of the above are properties of acids.

What is the full form of alcl3

When was the first published textbook containing a table identifying the first 33 elements

498calories equals how many kJ

This metal is very reactive, has properties similar to magnesium, and is in the same period as bromine. What element is this?

Chlorine gas can be prepared in the laboratory by the reaction of hydrochloric acid with manganese (IV) oxide. 4 HCl (aq) + MnO 2 (s) ⟶ MnCl 2 (aq) + 2 H 2 O (l) + Cl 2 (g) 4HCl (aq) + MnO2 (s) ⟶MnCl2 (aq) + 2H2O (l) + Cl2 (g) A sample of 43.

Calculate how many moles of glycine are in a 160.0-g sample of glycine. express your answer using four significant figures.

Which of the following words correctly describes CO2? Select all that apply A. Its a substance b its a compound c its a element D its a mixture

A certain reaction has an activation energy of 51.64 kj/mol. At what temperature Kelvin will the reaction be 5.50 times faster than it did at 343K?

What allows electrons to flow between electrodes in an electrochemical cell? a - conducting wire b - salt bridge c - electrolyte solutions d - battery