Which process represents a chemical change

An apparatus consists of a 4.0 dm^3 flask containing nitrogen gas at 25°c and 803 kPa, it is joined by a valve to a 10.0dm^3 flask containing argon gas 25°c and 47.2KPa.

You may remember that fresh water is the only type of water humans and animals can drink. For this reason, it is essential to life. What percentage of all water on Earth is fresh? options: 25% 75% 3% 90% ...

Why does the insolubility of benzene and water in each other cause each liquid to exert its own vapor pressure when a mixture of benzene and water undergo steam distillation?

How does a jellyfish reproduce? explain the process and use the words polyp and medusa. hint my there are two stages of reproduction

Difinition of homo sapiens

What conclusion can be drawn from the statement that an element has low electron affinity, low electronegativity, and a low ionization energy?

A scientist performs an experiment in which a radium-226 (Ra-226) atom decays into radon-222 (Rn-222). The scientist concludes that some energy must have been added to the system to cause this reaction to begin.

Which suitable method can be used to separate a mixture of sand and paraffin

How many vowels does the word love have

What is silicon used for? -matches -gunpowder -glass -steel can coating