How much does the temperature of a cup of 57.2 grams of water increase (water's specific heat is 4.18 J/g°C) when a heated 92.4 g block of Gold (whose specific heat is .129J/gºC) is
dropped in and experiences a temperature change of 20.4 degrees Celsius?

How is 0.00235 expressed in proper scientific notation? a. 2.35 × 10-3 b. 0.235 × 10-2 c. 2.35 d. 2.35 × 103

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

Amixture with the same composition throughout is!