Which of the following equations are correctly balanced? i. agno3 + nabr → agbr + nano3 ii. al + o2 → al2o3 iii. caco3 → 3cao + co2 iv. cu2so4 + zn → znso4 + 2cu

Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?

What substance has a mass of 9.5g and volume of 2.1cm^3

When 13.3 g koh is dissolved in 102.7 g of water in a coffee-cup calorimeter, the temperature rises from 21.4 °c to 31.53 °c. what is the enthalpy change per gram of koh (j/g) dissolved in the water? * take the density of water as 1.00 g/ml. * assume that the solution has a specific heat capacity of 4.18 j/g*k. enter to 1 decimal place. do not forget the appropriate sign /(+). canvas may auto-delete the (+) sign