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Question 11.Compound X is converted to elements A and B. Compound X has undergone a _____ reaction.
Question 22.If a substance has a half-life of 5 years, then how much of the initial sample remains after 15 years?
Question 33.Conservation of matter means that:
Question 44.How many moles of N2 are needed to produce 18 moles NH3 in the reaction N2 + 3H2 = 2NH3?
Question 55.What does it mean when the enthalpy change for a reaction is negative?
Question 66.How many moles of Na are needed to produce 15 moles of NaCl in the reaction 2Na + Cl2 = 2NaCl?
Consider the reaction:
Mg +CuCl2 = MgCl2 + Cu
Which type of reaction is shown above?
Question 88.Pure substances are further divided into elements and compounds. Which one best describes the rust found on a vehicle over time?
Question 99.What is a coefficient?
Question 1010.Enthalpy change is
Question 1111.The phase change when gas turns directly into a solid is called:
Question 1212.The charges on beta particles, alpha particles and gamma rays are _____ respectively.
Question 1313.Identify which general equation is a combination reaction.
Question 1414.Which type of reaction always requires oxygen to be a reactant?
Question 1515.An example of condensation is:
Question 1616.When a bond forms, this is an example of
Question 1717.The ability of iron to react to oxygen is an example of _____
Question 1818.What are the properties of a solid?
Question 1919.When does nuclear fusion occur?
Question 2020.An endothermic reaction is:
Question 2121.How is a mole ratio used?
Question 2222.Which of the following is a chemical property of the element hydrogen?
Question 2323.Cobalt-57 has a half-life of about 272 days. If a sample has an initial mass of 2.24 grams and undergoes decay until it has a mass of 0.140 grams, then how many half-lives passed?
Question 2424.A piece of pencil graphite (made of carbon atoms) has a mass of 0.12 grams. How many moles of carbon atoms are in the lead?
Question 2525.Carbon-10 has a half-life of about 19 seconds. How many half-lives does it undergo in 2 minutes and 32 seconds?
Question 2626.What are the characteristics of a liquid?
Question 2727.A piece of copper wire contains 5 moles of copper atoms. What is its mass?
Question 2828.Which type of reaction is involved with nuclear reactors?
Question 2929.A sample of thulium-171 has a mass of 0.4055 grams. How much is left after 6 half-lives?
Question 3030.Ocean water is a good example of a mixture because _____
Properties of Matter Chapter Exam Instructions
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