Which best describes a molecule? a unit made of different kinds of elements a unit made of only one kind of element a unit made of two or more atoms a unit made of a single atom

Limestone is composed almost entirely of calcite which has the chemical formula caco 3. As a result, limestone is classified as

Calculate [h+] and [oh-] for a neutral solution at this temperature. express your answers using two significant figures. enter your answers separated by a comma.

Which of the following is not a redox reaction? A. H2O (l) + NH3 (g) LaTeX: / longrightarrow NH4 + (aq) + OH - (aq) B. 2H2 (g) + O2 (g) LaTeX: / longrightarrow 2H2O (l) C. Zn (s) + H2SO4 (aq) LaTeX: / longrightarrow ZnSO4 (aq) + H2 (g) D.

What subatance particals are located in the nucleus of the atom?

Consider the reaction h2 (g) + cl2 (g) ⇀↽ 2 hcl (g), which is exothermic as written. what would be the effect on the equilibrium position of increasing the temperature?

What is it called when copper can be stretched into s thin wire?

What river basin provide river water to charolette and gastoia?

8. Calculate the molar mass of an alkane with the mole- cular formula C H18.

What is DNA? What information does it carry? Where is DNA located?

5. Differences in which property allow the separation of a sample of sand and seawater by filtration? A) concentration of ions B) volume of sample C) mass of sample D) particle size