Tony recorded data from his chemistry experiment in the following table. Sample Color Volume Temperature Mass A yellow 150 mL 20
°C 40.1 g B red 125 mL 20°C 15.2 g C clear 175 mL 20°C 26.3 g D green 150 mL 20°C 81.4 g Which of the categories from Tony's data table includes qualitative observations? A. mass B. temperature C. color D. volume
Answer is: 0,0095 mol of hydrogen gas will be produced in reaction. Chemical reaction: Ca + 2HCl → CaCl₂ + H₂. m(Ca) = 0,38 g. n(H₂) = ? n(Ca) = m(Ca) ÷ M(Ca). n(Ca) = 0,38 g ÷ 40 g/mol n(Ca) = 0,0095 mol. from reaction: n(Ca) : n(H₂) = 1 : 1. n(H₂) = n(Ca) = 0,0095 mol. n - amount of substance.
