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Determine the percent yield of a reaction that produces 28.65g of Fe when 50g of Fe2O3 reacts with excess Al according to the following reaction Fe2O3 plus 2Al equals Al2O3 plus 2Fe?
Peachbabe
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Predict the products of the following reaction MgCl2 plus K equals?
Mg + KCl
The following reaction is an example of 2 1 H 1 1 H to 3 2 He energy?
fusion for Apex as of Dec 8
What does the percent yield of a reaction measure?
It measures the amount of reactants actually produced in a reaction compared to the amount that would theoretically be produced if 100% of the reactants were converted to products according to the stoichiometry of the reaction. It is found by: actual moles of products ÷ predicted moles of products * 100%
What is a coefficient in a equation?
The coefficients in a chemical equation represent the amount of moles of each substance involved in the reaction. On a smaller level, it also represents the amount of particles that have to collide or are produced in the reaction. Consider the following example: CH4(g) + 2O2(g) (arrow) 2H2O(l) + CO2(g) The coefficent behind oxygen in the reactants means that 2 molecules of oxygen have to collide with 1 molecules of methane to react. The coefficients in the products mean that this reaction produces 2 molecules of water and 1 molecule of carbon dioxide.
What acts as an acid in the following reaction NH 3 plus PH 3 - NH 2- plus PH 4 plus?
As you have it written NH3 donates a proton to the solution and this hydrogen ion is picked up by PH3 to make PH4; so NH3 is the acid here. ( though this reaction seems odd to me )
Which of the following would most likely be spontaneous?
A reaction that produces heat
Which of the following substance is not involved in the chemical reaction that produces smog?
particulate matter
What of the following is necessary to determine the rateof the reaction using the rate law?
The concentrations of the reactants
To determine which of the products and precipitation reaction is the precipitate which of the following should you follow?
(Apex) solubility rules
Which one of the following is a step for balancing chemical equations?
Determine how long the reaction will take. apex
Which of the following is true about photosynthesis A. It is an exothermic reaction B. It is an endothermic reaction C. It produces carbon dioxide D. It occurs in animals?
Photosynthesis is an endothermic process.
Which one of the following is a step used for balancing chemical equation?
Determine how long the reaction will take. apex
Burning natural gas produces?
Natural gas is chemically known as methane, or CH4. The reaction of burning it produces the following chemical equation: CH4 + 2O2 --> CO2 + 2H2O.
What is a reaction that produces gas called?
A reaction that produces gas is called a gas-evolving reaction or a gas-forming reaction.
What defines an exothermic reaction?
A reaction that produces heat
What defines exothermic reaction?
A reaction that produces heat
What are substances that provide energy as the result of a chemical change?
These substances are called reactants, the reaction produces products. This type of reaction is called exothermic. As in the following reaction with the burning of methane: CH4 +2O2 ---> CO2 + 2H2O (reactants) (products)
