The presence of which element is indicated by a peak at m/z 127 and a characteristic 127-unit gap in the mass spectrum?

What type of reaction is zn + cucl2 → cu + zncl2?

Substance x has a fixed volume, and the attraction between its particles is strong .substance y had widely spread out particles and can be compressed what can most likely be concluded about these substances

Express the following number in scientific notation. 0.026890 =