Which of the following represents a chemical change?

a. bending a wire
b. freezing of water
c. fireworks exploding
d. melting of a wax candle
: d

What approach is required to balance the objectives of sustainable development? balancing the objectives of sustainable development requires a(n) .

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory