Water H20, is made up of different elements, hydrogen and oxygen. Is this type of combination a mixture or pure substance?

How can liquids be separated by density? a. the liquids are absorbed by paper b. the liquids are collected as they evaporate c. the liquids are allowed to separate into layers d. the liquids turn into separate vapors

Which of the following processes have a ΔS < 0? Group of answer choices carbon dioxide (g) → carbon dioxide (s) isopropyl alcohol condenses All of the above processes have a ΔS < 0. water freezes methanol (g, at 555 K) → methanol (g, at 400 K)

4. Among the following elements, which one has the most ionization energy? A) Cl B) Ba C) Si D) Br

Something that can be observed with a substance reacts with another substance

Why are fingerprints individual evidence?

Percentage compostion of carbon in CaCO3

Potassium iodide (ki) exhibits predominantly ionic bonding. the k and i ions have electron structures that are identical to which two inert gases?

Amino acid to protein as?

How many moles of metallic aluminum (al) could be produced from al3 + at a current of 0.09 amperes for 964,853 seconds?

At a certain temperature this reaction follows second-order kinetics with a rate constant of 14.1 M-1s-1 : 2SO3g - -> 2SO2g + O2g Suppose a vessel contains SO3 at a concentration of 1.44M. Calculate the concentration of SO3 in the vessel 0.