How many moles of each element are in one mole of (NH4) 2S

A catastrophic disturbance that resulted in mass extinction marks the boundary of which two eras? A. Precambrian time and Paleozoic era B. Paleozoic era and Cenozoic era C. Mesozoic era and Cenozoic era D. None of the above

Question 1 A process in which suthetances chemically rearrange to form new substances o Molecule Energy o Organism O Chemical reaction O Matter O Cellular respiration

A binary compound is a?

Polypeptides and proteins must fold properly to be functional. Hydrogen bonds between the oxygen and nitrogen atoms of the peptide bonds are crucial to which level of protein structure?

In the acid-catalyzed dehydration of 2-methyl-1-propanol, what carbocation would be formed if a hydride shift accompanied cleavage of the carbon-oxygen bond in the alkyloxonium ion?

How many atoms of chlorine would a molecule of carbon tetrachloride have? a. 0 c. 4 b. 1 d. 7

Suppose you perform an experiment at 21.5 oc and 1.00 atm and generate helium gas in the laboratory. what do you expect the molar volume of the helium to be?

Which best describes Rutherford's model of the atom? fish swimming in an aquarium a sports stadium with a marble at the center a scoop of chocolate chip ice cream a dense, solid ball

Which reaction represents the process of neutralization? Mg (s) + 2HCl (aq) MgCl 2 (aq) + H 2 (g) HCl (aq) + KOH (aq) KCl (aq) + H 2 O (l) C. Pb (NO 3) 2 (aq) + CaCl 2 (aq) Ca (NO 3) 2 (aq) + PbCl 2 (s) D. 2KClO 3 (s) 2KCl (s) + 3O 2 (g)

Which of the following is a correct representation of the isotope of carbon that has 7 neutrons? carbon-7 carbon-13 carbon-6 carbon-12