Is toasting marshmallows over a campfire a physical or chemical change?

Given the equation representing a reaction at equilibrium: N2 (g) + 3H2 (g) = = > 2NH3 (g) + energy Which change causes the equilibrium to shift to the right?

During unfavorable conditions, an ameba forms a ...

The larger the hole in the ozone layer gets, A. the less UV rays reach the Earth B. the more heat escapes from the Earth C. the more UV rays reach the Earth D. the warmer the Earth will get

What are some questions about weather

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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.

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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?