Which compound in 1 mol/dm3 solution has the highest PH value? a) Ethanoic acid b) Sodium chloride c) Sodium hydroxide d) Hydrogen chloride

Explanation:

A. Ethanoic acid-acetic acid being weak acid dissocated weekly and turns solution to weakly acidic, ph will be between 4-7,

B. Hydrochloric acid - the solution would be acidic- with lots of H+ ions, Ph will be between 1-4,

C. Sodium chloride - solution prodcued netural Na+ and Cl- hence wont affect ph of solution will be equalt to 7.

D. Sodium hydrogen carbonate-NaHCO3 is weak base and the PH will be above 7,

human factors increasing global warming. Burning fossil fuels, eg coal, gas and oil - these release carbon dioxide into the atmosphere. Deforestation - trees absorb carbon dioxide during photosynthesis. ... Agriculture - agricultural practices lead to the release of nitrogen oxides into the atmosphere.

The concentration of CO2 in the Earth’s atmosphere has increased dramatically over the last 150 years, from a pre-industrial era concentration of approximately 280 parts per million (ppm) to more than 410 ppm currently. CO2 concentration levels are unlikely to dip below these annual averages for hundreds of years.

Explanation: