Which is the best pure substance gold or air?

A stone is tied to a 0.85-meter cord. it is swung in a circle at a constant rate of 6.0 m/s. what is the centripetal acceleration of the stone? 42 m/s2 7.1 m/s2 0.14 m/s2 5.1 m/s2

Vaporization and filtration are both physical separation processes that do not alter the identity of a substances.

Is there a new powerful weapons that stronger than nuclear weapons. If yes, explain why and how.

What do members of the same group have in common?

What is the coordination number for each of the following complexes or compounds? A. [Fe (gly) 2 (H2O) 2]+ B. [Cr (EDTA) ]- C. [Pt (NH3) 4]2+ D. [Ag (NH3) 2]NO3

How many sulfide ions are present in 23.5g of Sb2S3

2. An automobile tire has a pressure of 210 kPa at 293 K. What will be the tire pressure after driving, if the tire temperature rises to 308 K?

Students measuring the mass of a rock record 6.759 g, 6.786 g, 6.812 g, and 6.779 g. Which other measurement of the block's mass would be most precise? A. 6.702 g B. 6.781 g C. 6.605 g D. 6.858 g

What two elements make up dihydrogen monoxide?

What did scientists observe using the earliest microscopes