6- The molar mass of potassium phosphate (NasPO) is (A) 163-94 amu (B).docx

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6. The molar mass of potassium phosphate (NasPO) is (A) 163.94 amu (B) 165.96g (C) 165.96 amu (D) 163.94 7. Cirele the mathematical relationship that expresses Charles\' Law (C) Vi/ni-Va/n2 (D) Pi/T2-P/T 8. A sample of a gas in a can has a pressure temperature is 240C. The gas is heated and temperature rises to measured as 1.06 atm and 5640C. The new pressure is: (A) 2.99 atm 9. The molarity (M of a solution of 35.0 grams of potassium h (B) 2.50 atm (C) 2.49 atm (D) 24.9 atm in 500, mL of solution is: (A) 0.125 M KOH (B) 1.25 M KOH (C) 1.35 M KoH ID)0.135 M KOH O The densities of four metals are given below: (A) 1.74 g/mL.: 7.87 g/mL (c) 2.70 g/mL (D) 11.3/m When an unknown metal of mass 42.0 g is placed in a graduated cylinder containing water, the water level in the cylinder rises from 7.50 mL to 12.84 mL Based on the densities given above, this unknown metal is: The first law of thermodynamies A) defines chemical energy. (C) defines entropy 11. is a statement of conservation of energy (D) is a statement of conservation of mass 12. Which of the following reactions (processes) is (are) Exothermic? I. S(s) + O2 (g)So2 (g)71 kcal 11. N2Os (g) + H2O (1) 2 HNO3(l) + 18.3 kcal III 2 NH3 (g)+ 22 kcal (g) N2 (g) + H2 (g) IV. N2 (g) + 2 O2 (g) + 16.2 kcal ? 2 NO2 (g) (B) Only II (C 1I and IV(D)I and I (A) Only I sed on the Lewis electron dot representation of PBs,the molecular shape 13. Ba iS (A) Linear (B) Trigonal planarTrigonal pyramidal (D) Bent (or Angular) Solution 6)Solution:- Molar mass of Na3PO4 = 163.94 g Explanation Molecular weight calculation: 22.98977*3 + 30.973761 + 15.9994*4? = 163.94 gm .

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6- The molar mass of potassium phosphate (NasPO) is (A) 163-94 amu (B).docx

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