Module 3 Unit 2 Assignment A - MODULE 3 UNIT 2 Assignment Part A This assignment is to be sent to your instructor for evaluation 1 a State Avogadros

# Module 3 Unit 2 Assignment A - MODULE 3 UNIT 2 Assignment...

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MODULE 3 UNIT 2 Assignment Part A This assignment is to be sent to your instructor for evaluation. 1.a) State Avogadro’s hypothesis. (2 points) b) A sample of 25 L of gaseous nitrogen reacts with 75 L of gaseous hydrogen to form a new compound. Use Avogadro’s hypothesis to explain the volume ratios according to which the gases react. (2 points) c) Suggest a possible formula for the compound formed by the reaction of the two gases. (2 points) 2.Why do gases all have the same molar volume at the same temperature and the same pressure? (3 points) -3.Use the KMT to explain how molar volume varies with:a)a decrease in temperature; it is directly related so volume also decreases (3 points) It is indirectly related so volume also decreases (3 points) 4.Calculate the molar mass of the following compounds: (16 points) a)NaCl = 22.999 + 34.45 = 58.44 g/mol b) CaBr2 = 40.08 + 2(79.90) = 199.88 g/mol c)K2 S =2(39.1) + 32.1 + (4(15.999) = 110.27 g/mol d) H2SO 4 = 2(1.0) +32.1+ 4(14.01) = 98.09 e)Mg (NO3) 2 = =24.31+2(14.01)+6(16.00)=148.33 g/mol
f)Al(C2H3O2)3 = =26.98+6(12.01)+9(1.01)+6(16.00)=204.13 g/molg) Sr3(PO3)2 = 3(87.62)+2(30.97)+6(16.00)=420.80 g/molh) (NH4)2CO3 = 2(14.01)+8(1.01)+12.01+3(16.00)=69.11 g/mo 5.Do the following calculations, applying unit analysis to find the appropriate units for the answers. (12 points) a)25 m/s x 25 s = =625m ( s closes s)b)95 km/h x 15 s x 1h/3600 s x 103m/1 km = 395.8m (km,h and s close each other out) c)25 km x 10 6mm/km x 106mm/km = 2.5*10^7 kmd)525 m 15 m/s = =35se)25 mol x 18.0 g/mol = 54.5*10^2g f)2.5 g/L x 22.4 L/mol = 56g/mol Total 43 points Submission Instructions Submit your assignment using the drop box on the Assignment page for this unit.
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