Check the box if the statement describes MECHANICAL weathering Fossil fuels react with water in air to create precipitation that wears minerals away
Roots grow into cracks of rocks and pry them apart
Carbon dioxide dissolves in water then weathers marble and limestone.
Rock particles wear away rock.
Plants produce weak acid that slowly dissolve rock that surrounds roots
Ground breaks away by animals burrowing.
Oxidation produces rust on some rocks with iron.
Breaks rocks by ice freezing and thawing.

HELP ASAPPP PLEASE I WILL GIVE BRAINELIST IF CORRECT

The molecular formula for caffeine is cshion402. which of the following elements is not found in caffeine?

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

A3.37-mg sample of protein was chemically digested to convert its nitrogen into ammonia and then diluted to 100.0 ml. then 10.0 ml of this solution was placed in a 50-ml volumetric flask and treated with 5 ml of phenol solution plus 2 ml of sodium hypochlorite solution. the sample was diluted to 50.0 ml, and the absorbance at 625 nm was measured in a 1.00-cm cuvette and found to be 0.486. for reference, a standard solution was prepared from 10.0 mg of nh4cl (molar mass = 53.49 grams/mole) dissolved in 1.00 l of water. then 10.0 ml of this standard was placed in a 50-ml volumetric flask, treated in the same manner as the unknown, and the absorbance found to be 0.323. finally, a reagent blank was prepared using distilled water in place of unknown, it was treated in the same manner as the unknown, and the absorbance found to be 0.076. calculate the weight percent of nitrogen in the protein.