Why are emission spectra referred to as the fingerprints of the elements?

A sample of copper wire with a mass of 1.659 g is heated with excess powdered sulfur until the copper has combined with the sulfur, and all the extra sulfur has been burned off. The final product (a sulfide of copper) has a mass of 2.080 g.

What do scientists use to determine what the interior of a moon is like?

What is the total number of valence electrons in an atom of germanium in the ground state? (1) 8 (3) 14 (2) 2 (4) 4

How do I calculate the sum of 6.078 g and 0.3329 g?

How does charle's law relate to breathing?

Why does the chair in which you are currently sitting retain its same shape over time? Question options: The particles of the chair are strongly held together. The chair is lower in energy than the surrounding environment.

Which of the following is not a benefit provided by a social group A. instinct to run from predators B. access to mates C. protecting young D. learning to recognize predators

Why must an air traffic controller know a plane's velocity

Compare and contrast the two kinds of chemical bonds (ionic and covalent)

If a thin and a thick wire are otherwise identical, what property is lower for the thicker wire? 1. current 2. static charge 3. resistance 4. voltage