Using the information below, calculate how much energy is needed to heat 45 g of water from 15C to 75C. *
1. 5643 J
2. 14108 J
3. 6102 J
4. 11286J

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

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.

Answer asap : ( a. how does mucus prevent the entry of pathogens? b. describe two ways white blood cells protect us from pathogens.