I need help these 2 question specific Heat q=mc∆t 11. A 55 kg block of hot granite was placed in 60kg of water and raised the temperature by 15.0°C. How much energy per gram was released by the granite? a. Find the percent efficiency per gram if the theoretical yield was 75 J/g.

12. When a 120 g sample of aluminum is placed in 250 g of water the temperature increases from 25°C to 115°C. Find the energy per gram of aluminum. a. Find the percent efficiency per gram if the theoretical yield was 8500 J/g

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

Problem page combustion of hydrocarbons such as pentane ( c5 h12 ) produces carbon dioxide, a "greenhouse gas." greenhouse gases in the earth's atmosphere can trap the sun's heat, raising the average temperature of the earth. for this reason there has been a great deal of international discussion about whether to regulate the production of carbon dioxide.(a) write a balanced chemical equation, including physical state symbols, for the combustion of liquid pentane into gaseous carbon dioxide and gaseous water. (b) suppose 0.350 kg of pentane are burned in air at a pressure of exactly 1 atm and a temperature of 20.0 degree c. calculate the volume of carbon dioxide gas that is produced. be sure your answer has the correct number of significant digits.