need task 1-4 please!!!

Task 1: A mercury barometer was used to record the atmospheric pressure during a particularly nice summers day in Florence, 1646 CE, as 764.7 mmHg (tor) a) Determine what the pressure was on that day in atmospheres b) Determine what the pressure was on that summers day in pascals Task 2: By definition 1 bar equals exactly 100 000 pascals *) Determine a conversion factor between bar and pascals (i.e. 1 bar = X Pascals) b) Utilize the power of the metric system to find a direct conversion between millibars and Pascals (i.e. 1 millibar="x" Pascals) c) If the atmospheric pressure during a particularly nice summers day at Yachats in 2017 was measured as being 1019.56 millibar, express this pressure in pascals. Task 3: Chemistry instructors commonly like to visit Yachats on sunny summer days and look out at the occan. A typical chemistry instructor's head has a surface area of 0.100 m. a) Calculate the mass (kg) of air that is pressing down on their head when the pressure is 1019.56 millibar. Weight is measured in N, mass is measured in kg. Gravity =9,81 m's! Weight - Mass X Gravity b) Discuss whether you think that this is a strain on a typical Chemistry Instructor Task 4: In a lab reaction you are using an electroactive metal (Magnesium) to reduce the hydronium ions in sulfuric acid to hydrogen gas which you collect in a 1 litre reservoir above the reaction flask. Using a water tube manometer, you measure the pressure of the gas in your container. a) If the water at the open (atmospheric side) of the manometer U-tube is 12.37 cm higher than at the reservoir side of the U-tube. Determine what the additional pressure is inside the reaction reservoir. (Assume the U-tube has a cross section of 1.000 em, that water has a density at this temperature of 0.9980 g/cm G =9,81 m/s?)) (NOTE think about how to get into Si units) (F = ma, P-FA) b) Discuss what would happen to the amount of gas produced in your reaction if a different U-tube were used to measure pressure? c) What would happen to the height of the water if this different U-tube had a cross section of 2 cm? d) If this reaction was performed on a sunny day in Yachats with a measured atmospheric pressure of 1019.56 millibar, what is the total pressure inside your gas reservoir