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ID number:285518
 
Author:
Evaluation:
Published: 18.05.2021.
Language: Latvian
Level: Elementary school
Literature: n/a
References: Not used
Extract

Doti divi numurēti cilindri. Vienā no tiem ir skābeklis, otrā ogļskābā gāze. Kā noteikt, kurā cilindrā atrodas skābeklis? (2punkti)

Ogļskābā gāze vienīgā, kas izsauc kaļķūdens duļķošanu (Co2+ CaOH2 = CaCo3 + H20
Skābeklis vienīgais kas deg, ja pie tā pienes degošo lampu.

Kādas īpašības piemīt skābeklim? Atbildē izmanto vārdus vieglāks, smagāks, šķīst, nešķīst. (4punkti)

Skābeklis ir smagāks par gaisu un vieglāks par ogļskābo gāzi, tas nešķīst ūdenī, bet šķīst kausētajā sudrabā.

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