Zadania z chemii IB HL

Successive ionization energies of an element: Ionization energy number Energy / kJ mol⁻¹ 1st 738 2nd 1451 3rd 7733 4th 10 540 5th 13 630 6th 17 995 7th 21 704 8th 25 656 9th 31 643 10th 35 461 Which element has these successive ionization energies? A. Sodium…

How many ions are present in 142 g of $\ce{Na2SO4}$? $M(\ce{Na2SO4}) = 142\ \mathrm{g\,mol^{-1}}$ A. 1 B. 3 C. $6.02 \times 10^{23}$ D. $1.81 \times 10^{24}$

What is the empirical formula of an alcohol with 60.0 % mass carbon and 13.4 % mass hydrogen? A. $\ce{C3H7}$ B. $\ce{C6H16O2}$ C. $\ce{C3H8O}$ D. $\ce{C2H6O}$

Which properties are expected for the compound lithium bromide? A. Not soluble in water, low melting point, does not conduct electricity when solid, does not conduct electricity when molten B. Not soluble in water, low melting point, conducts electricity when…

What is the correct electron domain geometry and molecular geometry of $\ce{SF4}$? A. Trigonal bipyramidal electron domain geometry, trigonal bipyramidal molecular geometry B. Trigonal bipyramidal electron domain geometry, seesaw molecular geometry C.…

Which species contains a coordination bond? A. $\ce{AlCl3}$ B. $\ce{PH3}$ C. $\ce{[NH4]+}$ D. $\ce{HCOO-}$

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

How many sigma and pi bonds are present in pent-1-yne, $\ce{C5H8}$? A. 12 sigma bonds and 2 pi bonds B. 8 sigma bonds and 3 pi bonds C. 13 sigma bonds and 1 pi bond D. 9 sigma bonds and 4 pi bonds

Which classification is correct? A. Alkali metal: rubidium; transition element: platinum; halogen: xenon; noble gas: bromine B. Alkali metal: rubidium; transition element: platinum; halogen: bromine; noble gas: xenon C. Alkali metal: platinum; transition…