Question 14

all synthetic elements

a)are used in smoke detectors

b)are needed by the human body

c)are not typically found on earth

d)have more than 92 protons

All synthetic elements are not typically found on Earth.

Explanation:  

Synthetic elements are the man-made elements and for creating it additional protons are forced on the nucleus of an element where the atomic number should be less than 95 which is a very tedious process.

Synthetic materials are not naturally found on earth but are made by man in order to use for the better way of living. Synthetic elements are generally extracted from the plant and animal sources and used for betterment. The synthetic things are harmful for mankind and disrupts our nature. Synthetic fibres are of long chain of polymers which are made from single unit and bound together. The process for synthetic fibre is known to be polymerisation.

when a reversible reaction is occurring in both directions at the same rate; the products and reactants do not change in concentration. a chemical reaction where the compound is broken into its constituent parts.

explanation:

mark brainliest and have a great day!

cellular respiration oxidizes food into energy in the form of atps.

glycolysis (6 c hexose) > 2x atps are used > 6c hexose biphosphate > 2 x 3c triphosphate >

2 x 3c pyruvate (2x nadh produced from nad) and (4x atp produced)

pyruvate actively pumped mitochondrial matrix.