How can the carbon dioxide released by the burning of fossil fuels most likely affect Earth's climate?

What is the subscript for oxygen in its molecular formula

A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution

Citric acid has a ph between 1 and 3.  it is considered to be aa. weak acidb. weak basec. strong based. strong acid