Pls help ASAP Calculate the boiling point of an ionic solution containing 29.7 grams of Na2SO4 dissolved in 84.4 grams of water. The Kb for water is 0.512 °C/m.

A) 102.5 °C
B) 101.2 °C
C )103.8 °C
D) 103.4 °C

In pqr m< p=60 m< q= 30 and m

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.

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.