Concept explainers
The equation for the reaction of iron and oxygen gas to form rust (
a. How many kilojoules are released when 2.00 g of Fe reacts?
b. How many grams of Fe203 form when 150 kJ are released?
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EBK BASIC CHEMISTRY
- The number of moles of H2O produced in reaction of 50 mL 1.0 M HCl and 50 mL 1.0 M NaOH: (5.00×10−2) Joules released per mole of water formed: ?arrow_forwardHelparrow_forwardPart I. Complete the following chemical reactions. Do not forget to balance the reaction, the states of matter and answer any questions that are asked. In the next reaction, a gas is formed. (19 points). HCl (aq) + Mg (s) → Gas that was released: Mg (s) + O2 (g) → Cu2S (s) + O2 (g) → Gas that was released:arrow_forward
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- Ethylene (C2H4) is the starting material for the preparation of polyethylene. It is usually made during the manufacturing of petroleum. It occurs as a fruit-ripening hormone and a component of natural gas. If the heat of combustion of C2H4 is -1411 kJ/mg. how many grams of the ethylene must be burned to give 70.0 kJ of heat? a. 3.29 grams b. 1.39 grams c. 9.21 grams d. 2.19 gramsarrow_forwardWhen the reaction shown below is performed using: A + B --> C + D The temperature changes from 25.0 degrees Celsius at the start to 19.0 degrees Celsius at the end of the reaction. a. Is the reaction endothermic or exothermic? b. What is the value of q for the reaction if the mass of the reaction was 54.4 grams ?arrow_forwardOnly 1 to 10arrow_forward
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