Which of the following is an example of chemical weathering

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

What is the percent composition of ca(oh)2? 37.7% ca, 53.0% o, and 10.3% h 45.5% ca, 38.2% o, and 16.3% h 54.0% ca, 43.0% o, and 2.7% h 64.7% ca, 27.0% o, and 8.3% h

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)