Sabis Chemistry level L chp3

Which gas has color of yellow green?

• nitrogen dioxide

• chlorine

• hydrogen chloride

• ammonia

Which statement is correct?

• when gases react together, they always so in the ratio of real numbers

• when liquids react together, they always so in the ratio of real whole numbers

• when gases react together, they always do so in the ratio of small whole numbers

• when gases react together, they always do so in the ratio of small numbers

What is the atomicity of Ne?

• 1

• 2

• 3

• It doesn't have atomicity

A metal is a substance that is shiny and conducts electricity

• operational

• conceptual

Which of followings is elements?

• nitrogen gas

• table sugar

• NaCl

• a cube of ice

Which substance has molecular formula?

• silver

• salt

• diamond

• ammonia

What does 1 amu means?

• mass of a carbon atom

• mass of one mole of carbon atoms

• mass of a 1/12 carbon atom

• mass of 1/12 mole of carbon atoms

What is the unit for molar mass?

• moles

• g/mol

• grams

• no unit since it's relative mass