Question

All information needed to complete this worksheet can be found in the pre-lab information and calculations sections of the lab manual. Read this introductory material first Record all values with the correct number of significant figures and units. Place all answers on the line when provided. show calculations for any numerical answers' work must be shown to receive credit. See any 102 TA in the help office before your prelab is due if you have any questions. Each question is worth 2 points. ou have the following reaction: Ma(s) + 2 HCl(aq) + Mg2+(aq) + Haq) + 2Cl(aq). Answer the queous acid Tollowing questions with the data given. The hydrogen gas is collected above the aqueous ac solution in an inverted graduated cylinder. Moles of Mg metal: 0.0033mol Temperature of gas 28.0°C Atmospheric pressure: 1.02 atm. 1. What mass of magnesium metal (in mg) is present? 0.0033mo) *24.3 05g/mol = 0.08020639 80.2mg 2. How many moles of hydrogen gas can be produced from the magnesium metal? Show work! Mg +2H01 Mg2+ H2 +212 Imol Mg = 1 mol H2 0.0033 mo 3. What is the pressure of the hydrogen gas in the graduated cylinder? (see p 100) Patm-1.02ath n=0.0033 mol R=0.082037 T= 301 VE? 1-02 atm-0.0372 atm 6,9828 -0. 932 8 ss will be produced? 4. How many milliliters of hydrogen gas will be produced? PVEART Pe 0.0033 ma 0.082657300 0.9828 109
#4 please

Answer 1

Mge3+ 2 Helar nga + 24 + H₂(g) n mans of mg = molex molarman = 0.0033 x 24.305 = 0.0802 g * 80.2 mg 2) From balanced equation, 1 mole of mg = 1 mole of te moles of H₂ produced & 8. 2033 roles . 3) pressure of water vapor at 28°C = 2804 torr pressure dry H₂ gav a pressure measured-water vaper pressure (1 atm ar bo tore 1 = 77512 torv – 28.4 torr 102 atm= 775.2 torr ) F. 746.8 torr F2:9826 atm A) PV = nRT DRT 0.0033x0.082057 *301008295 L 0.9826 82.95 mL