Betty Lou weighed an object on her balance and recorded a mass of 24.21 grams. Her teacher told her that there was obviously something wrong with her balance because it was giving her a reading which was 33.22% too high. What was the actual mass of the object?

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

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

How much heat is added if 0.814g of water increase in temperature by 0.351 degree c?