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UNIT 2 — MILESTONE 2: Chemical Reactions and Energy Milestone SUBMIT MILESTONE 110 Question 14 A piece of unknown substance has a mass of 437.2 g and requires 8460 J to increase its temperature from 19.3 °C to 68.9 °C. Assuming the substance is one of those listed in the table presented in this lesson, what is the identity of the substance? ● Mark this question copper lead iron aluminum Report an issue with this question SAVE & CONTINUE Here are all the tutorials from Unit 2. Use them as needed throughout the Unit 2 Milestone. UNIT 2 TUTORIALS 2.1 Stoichiometry  2.1.1 Quantities in Chemical Reactions 2.1.2 Introduction to Reactions 2.1.3 Chemical Equations 2.1.4 Reaction Stoichiometry 2.1.5 Chemical Reactions in the Real World 2.2 Energy  2.2.1 Energy Basics 2.2.2 Matter and Energy 2.2.3 Laws of Thermodynamics 2.2.4 Calorimetry 2.2.5 Energy in Our World ● ● ● ●  ● ● ● 〈 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 〉