12. A student set up an experiment to investigate substances formed when a candle burns in air utute
7
To pump
Calcium hydroxide
Ice cold water
candle
a) What observation was made in the;
U-tube
Boiling tube containing calcium hydroxide

answer: mole of the gas

answer: mole of the gasexplanation:

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.

it was spontaneous.

"ain't i a woman? " is the name given to a speech, delivered extemporaneously, by sojourner truth, (1797–1883), born into slavery in new york state.sojourner truth' delivered her famous speech "ain't i a woman? " (which did not have a title at that moment) was given without any previous preparation. her dissertation took place at the women's convention in akron, ohio, in 1851.