Which of the following is true about carbon dioxide? a.) carbon and oxygen are chemically bonded in it. b.) carbon and oxygen retain their original identity in it. c.)it can be separated into carbon and oxygen using physical methods. d.)the proportion of carbon and oxygen is different in different samples of the gas.

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

Ab c or d ? i’m not sure what the answer is

Is the idea of spontaneous generation supported by redi's experiment? justify your answer in 2-3 sentences?