Rachel burns a 53 gram cracker under a soda can filled with 77.2 grams of water. She took the temperature of the water before she began -- it was 6.9 degrees Celsius. After the cracker was done burning, the temperature of the water was 84.3 degrees Celsius. How many calories of heat were released by the cracker? Round your answer to one digit after the decimal point.

To save time, you can approximate the initial mass of the solid to the nearest ±1 g. for example, if you are asked to add 14.3 g of copper, add between 13 g and 15 g. which of the following sets include two samples with an equal density? which all that apply below 15.4 g gold and 18.7 g silver 15.2 g copper and 50.0 g copper 20.2 g silver and 20.2 g copper 11.2 g gold and 14.9 g gold

Stage in which a typical star has completely stopped fusion

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.