Hòa tan hoàn toàn 4,7 gam K2O vào nước được 1000ml dung dịch A. a. Tính pH của dung dịch A.

b. Cho dung dịch A phản ứng với 100ml dung dịch H2SO4 0,05M. Tính pH của dung dịch sau phản ứng.

24 points and brainliest to anyone who can answer under 10 minutes with best ! the table below shows the role of different substances during photosynthesis. substance role during photosynthesis glucose stores chemical energy water combines with glucose to form carbon dioxide chlorophyll traps sunlight which of the following statements would correct one of the roles listed in the table? glucose combines with carbon to form water. chlorophyll reacts with light to produce carbon dioxide. water combines with carbon dioxide during photosynthesis. chlorophyll stores chemical energy needed for photosynthesis.

Which of the following is an example of how telecommunication devices people do their jobs? a.) a security guard checks the time using a digital watch. b.) a banker does some quick math using a solar calculator. c.) a nurse uses a digital thermometer to take a patient’s temperature. d.) a construction worker reports in to his office using a cell phone.

The biosphere of the earth is made up of . a. inorganic b. organic