Which of the following statements is true about the carbon cycle?
carbon molecules enter the atmosphere through the process of respiration.
the carbon cycle describes how carbon moves
between living and nonliving things in the environment.
the amount of co2 in the atmosphere is increasing.
all of the above

Acalorimeter is to be calibrated: 51.203 g of water at 55.2 degree c is added to a calorimeter containing 49.783 g of water at 23.5c. after stirring and waiting for the system to equilibrate, the final temperature reached is 37.6 degree c. specific heat capacity of water (s = 4.18 j/g∙degree c). calculate the calorimeter constant. (smδt)warm water = -[(smδt)cold water + (calorimeterδtcold water)]

Anyone who's in connections academy chemistry b have the factors that affect the rate of a reaction portfolio already done?

Determine type of reaction & predict the product c3h12+o2 =