chemistry

The molar mass of HCL is

• 36,5 g/mol

• 35,5 g/mol

• 35,6 g/mol

• 1 g/mol

Nitric oxide (3)

• NO

• N2O5

• N2O3

• NO3

Formula of hydrocyanic acid

• HCOOH

• HCN

• CH3COOH

• HCLO

Formic acid is ...

• strong

• weak

Which of the following reactions takes place?

• ZnSO4 + Fe →

• CaCO3+NH4OH →  

• Ca(NO3)2+Na2CO3 → 

• Na2CO3 →

Which of these is an amphoteric oxide?

• BeO

• FeO

• Ag2O

• NO

The element with atomic number 88 belongs to the family:

• s

• p

• d

• f

Specify the name of the chemical substance

• snow

• ice

• water

• snowflake

A pure substance, not a mixture, can be considered:

• cologne

• distilled water

• hydrochloric acid

• milk

Indicate the fourth "extra" in the list:

• ice

• snowflake

• smoke

• iceberg