An evaluation of r was performed, following the procedure described in this module. the barometric pressure was 736 torr, the temperature was 295k and volume of hydrogen gas collected was 35.6 ml. the calculated value of r was 82.1 ml atm k-1 mol-1. 1) how many grams of magnesium metal were used? 2) if the vapor pressure of water had not been taken into account, what would have been the calculated value of r? 3) if the springe volume had been incorrectly read, giving a calculated system volume of 25.6 ml, what would have been the percent error in the calculated value of r?

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.

When the water vapor cools it condenses select a number that represents his process on the

Calculate - analysis of compound composed of iron and oxygen yields 174.86 of fe and 75.14g of o. what is the empirical formula for this compound?