Calculate the amount of heat released when 27.0 g h2o is cooled from a liquid at 314 k to a solid at 263 k. the melting point of h2o is 273 k. other useful information about water is listed below.
cp, liquid = 4.184 j/(g•k)
cp, solid = 2.093 j/(g•k)
δhfusion = 40.7 kj/mol

There is an area in idaho named craters of the moon where most of the ground is covered with basalt, adark gray, igneous rock with no visibl crystals. what can you infer about the geographical history of the area?

Which part of a feedback mechanism is able to monitor the conditions outside of cells and usually uses nerve cells to relay this information to an intergrating center

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams