- If we lost the ozone layer what plants would grow on land?

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Is there a powder that changes colour when exposed to a strong light-source such as a laser-pointer beam. To be used for an art project...? How much heat is needed to convert 1.00 mol of ice at –50.0 °C to water at 70.0 °C? How do I find the tangent plane to surface?
I need to find the tangent plane at (3,4,-3) for the equation:
x^2+y^2-z^2-4xy+4xz=-68? How many grams
of sulfur S8 must be dissolved in 100.0 g of naphthalene
1C10H82 to make a 0.12 m solution? MATH HELP????? Can someone help me find the equation to the graph below?