Which of the following is a pure substance that can be separated by physical means and can't be decomposed into other substances by chemical means

A: element

B:molecule

C: compound

D: mixture

What volume does 8.5 g NH₃ occupy at STP? a. 2.81 L b. 5.61 L c. 11.21 L d. 22.41 L e. 44.81 L

A gamma ray has a very high frequency of about 1019 s-1. what is the wavelength of the gamma ray?

How many atoms are present in 2 molecules of C6H12O6

Cual es la diferencia entre un volcán de verdad y uno hecho casero

There are three statements of matter

A Gran plot for a potentiometric titration resulted in a slope of 5.56 x 105. Measurements were made using SCE as the reference electrode and the analyte Eo was determined to be 0.354 V.

Aight imma let you guys i

In which choice is the ellipsis used correctly to select from this sentence from The Scarlet Letter? A throng of bearded men, in sad-coloured garments and grey steeple-crowned hats, inter-mixed with women, some wearing hoods, and others bareheaded,

Explain the difference between the greenhouse effect and global warming.

How does adding salt affect the surface tension of water? if it increases surface tension, will it always increase it?