Mr. Wurtz performed a demonstration for his science students in a well-ventilated room. He mixed together two samples of different white powdery substances in an
open beaker. The dry mixture soon became wet, and the students could smell
ammonia. The temperature of the beaker dropped dramatically, so much so that the
liquid that formed in the beaker began to freeze.

A liquid formed at the bottom of the beaker

The temperature of the mixture dropped dramatically

A gas with strong smell was released from the mixture

The powdery substance dissolved in the water

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

the link still does not work even when adding it to the url bar

explanation:

answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.