X-mas Quiz is ....

What is the average molar mass of the mixture composed by

756 g nitrogen gas and 27 mol carbon-monoxide

• 28g/mol

• 21 g/mol

• 36g/mol

• 29g/mol

Reorder the following atoms by increasing number of unpaired electrons!

• Zn

• Ge

• Fe

• Cr

• P

Reorder the following atoms by decreasing number of valence electrons!

When equal main group element are to set higher than subgroup elements!

• Cr

• Fe

• Se

• He

• Zn

Tags

NGSS.HS-PS1-1

Pair the molarity with the corresponding concentrated acids of lab work!

• 15 mol/dm³

• 85% sulpuric acid (1740kg/m³)

• 10 mol/dm³

• no pair

• 11 mol/dm³

• 63w% nitric acid (1410kg/m³)

• 14 mol/dm³

• 98w% sulpuric acid (1840kg/m³)

• 18 mol/dm³

• 35w% hydrochloric acid (1840kg/m³)

Az NaOH egy ...........-bázis.

Szokványos mértékegysége: g/dm³.

Tags

NGSS.HS-PS1-5

Milyen kémhatású a só vizes oldata?

Groups:

(a) savas

,

(b) lúgos

,

(c) semleges

• ammónium-klorid

• nátrium-karbonát

• kalcium-klorid