A sample of radon-222 has a half life of 3.82days. After 11.46 days, there is 5 grams of radon-222 remaining. How much radon 222 was in the original sample

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

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.