An unknown substance gives a red flame test and its solution yields a cloudy, white precipitate with carbonate. What element(s) might be present in this substance? Explain your choice.

Which best explains why an iceberg floats?

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.

Consider the story you just read. all but one of the choices below indicate that something is living.