25.The diagram shows some organisms in an Antarctic food chain. Sun-Algae Krill Cod-Seal-
Which BEST describes the role of krill in this food chain?
A. producers
B. decomposers
C. primary consumers
D. secondary consumer

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?

It is really hard for me right know

The starship enterprise is caught in a time warp and spock is forced to use the primitive techniques of the 20th century to determine the specific heat capacity of an unknown mineral. the 125-g sample was heated to 96.3°c and placed into a calorimeter containing 85.9 g of water at 20.0°c. the heat capacity of the calorimeter was 14.2 j/k. the final temperature in the calorimeter was 24.5°c. what is the specific heat capacity (in j/g°c) of the mineral? enter to 4 decimal places.