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Which of these physical changes would require the addition of energy?

Determine the standard enthalpy of reaction for    X2YO2(s) →  2X(g) + YO2(g) ΔH° = ? kJ/mol-rxn Your answer should include 1 decimal.   Substance ΔfH°(kJ/mol-rxn) X(g) –745.4 YO2(g) –393.5  X2YO2(s) –845.5 ​ ​

Exactly [x] J will raise the temperature of [m] g of a metal from 25.0 °C to 60.0 °C. What is the specific heat capacity of the metal in units J/(g · °C)? 

A bomb calorimeter has a heat capacity of 2.47 kJ/K. When a 0.120-g sample of ethylene (C2H4) was burned in this calorimeter, the temperature increased by 2.44 K. Calculate the enthalpy change per mole of ethylene combusted.

Solve the quadratic equation.t (t + 4) = -5

Solve the quadratic equation.6v2 + 24v + 60 = 0

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Audio example ?VxJw3wfC56=1748351114&Kq3cZcYS15=8b73988c51f7418794add232722274a2&Kq3cZcYS15=8b73988c51f7418794add232722274a2&VxJw3wfC56=1748351114&3cCnGYSz89=q%2FxONeS2yHDgz0a5U1pCU7903tBXJvcl1QG0ANZUvOc%3D#25 is which musical term from the list of musical terms below?