What does a chemical reaction always produce?

A) A different phase of matter (solid from liquid, gas from liquid, etc.)

B) A physical change

C) A chemical change

D) Heat

What is the scientific definition of heat

The reduced coenzymes generated by the citric acid cycle donate electrons in a series of reactions called the electron transport chain. The energy from the electron transport chain is used for oxidative phosphorylation.

What is the change in enthalpy for the combustion reaction of butane, C4H10? 2C4H10 (g) + 13O2 (g) → 10H2O (g) + 8CO2 (g) Given: C4H10 (g) : ΔHf ° = - 125 kJ H2O (g) : ΔHf ° = - 242 kJ CO2 (g) : ΔHf ° = - 393.5 kJ

What is the percent composition of each element in S2Br

A tree trunk is a type of ... 1. root 2. leaf 3. stem 4. seed

Electron configurations are like an address because?

What are the pros of using steel?

For an experiment, a student needs 100.0 mL of 0.4220 M NaCl. If the student starts with NaCl (s) and distilled water, which of the following pieces of laboratory glassware should the student use to prepare the solution with the greatest accuracy?

In a dilution, solvent is added to a given amount of a concentrated solution. What happened to the total concentration?

Why does claudius plan to poison the drink?