Zadania z chemii IB HL

Znalezionych zadań: 5

Filtry i umiejętności1

Which molecules are polar? I. $\ce{CHCl3}$

II.

\ce{CH2F2}

III.

\ce{CF4}

A. I and II only B. I and III only C. II and III only D. I, II and III

Which molecule is polar? A. $\ce{BF3}$ B. $\ce{NF3}$ C. $\ce{CCl4}$ D. $\ce{C2H4}$

Several stereoisomers exist among the dichloroalkenes of molecular formula $\ce{C4H6Cl2}$ . (i) Draw the structural formula of cis-2,3-dichlorobut-2-ene. (ii) Outline why the cis-isomer of 2,3-dichlorobut-2-ene is polar, whereas the trans-isomer is not. (iii)…

(i) State the electron configuration of a nitrogen atom. (ii) Draw the Lewis formula of ammonia. (iii) Deduce the electron domain geometry and the molecular geometry of the ammonia molecule. (iv) Explain why the ammonia molecule is polar.

Which molecule has the largest net dipole moment? A. $\ce{SiF4}$ B. $\ce{CS2}$ C. $\ce{H2S}$ D. $\ce{H2O}$