Chemistry for Today
8th Edition
ISBN: 9781133606994
Author: Seager, Spencer L./
Publisher: Cengage Learning
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Carbon and oxygen combine to form carbon dioxide. What are the reactants, or what is the reactant, in this chemical reaction?
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- True or false? Mixtures always result in a chemical reaction because they consist of two or more substances and thus combine to create a new product.arrow_forwardSuppose that you are closing a cabin in the north woods for the winter and you do not want the water in the toilet tank to freeze. You know that the temperature might get as low as 30. C, and you want to protect about 4.0 L water in the toilet tank from freezing. Calculate the volume of ethylene glycol (density = 1.113 g/mL; molar mass = 62.1 g/mol) you should add to the 4.0 L water.arrow_forwardA student heated a hydrated salt sample with an initial mass of 5.322 g. The sample was heated to constant weight after reheating. The student determined that the mass had decreased to 2.798 g. What was the percent water in the original hydrated sample?arrow_forward
- Determine the mass of the sample based on the following data to two decimal places mass of crucible and cover 50.01 mass of crucible, cover, and sample before heating 51.05 mass of crucible, cover, and sample after heating 50.83arrow_forwardA Kool-aid solution has sugar and flavoring as the solute and water as the solvent. If ice cubes of water are added to a pitcher of Kool-aid, what happens to the sugar molecules as the ice melts. A. There is not enough information given to determine this. B. The sugar molecules will react with the ice cubes. C. The number of sugar molecules will decrease and be further apart. D. The number of sugar molecules will remain the same, but will be further apart.arrow_forwardTo keep homamade ice cream frozen, it is placed in a bucket of ice-water and salt mixture. A mixture is commonly composed of 1.70 kg of salt (NaCl) and 5.25 kg of ice.arrow_forward
- A student believes she is observing a chemical reaction when pure sugar is burned and caramelizes. How can the student tell that a chemical change has really occurred? a. by comparing the solubility of each in water b. by comparing their volumes c. by comparing their masses d. by comparing whether each are in the solid, liquid, or gas phasearrow_forwardIn Figure 1.5 you see macroscopic and particulate views of the element bromine. Which are the macroscopic views and which are the particulate views? Describe how the particulate views explain properties of this element related to the state of matter.arrow_forwardHow do you distinguish (a) chemical properties from physical properties? (b) distillation from filtration? (c) a solute from a solution?arrow_forward
- (For Exercises 4546) Solutions containing nickel(II) ion are usually bright green in color. When potassium hydroxide is added to such a nickel(II) solution, a pale-green fluffy solid forms and settles out of the solution. The fact that a reaction takes place when potassium hydroxide is added to a solution of nickel(II) ions is an example of a properly. . The fact that a solution of nickel(II) ion is bright green is an example of a property.arrow_forwardIf a sample of iron and a sample of zinc come into contact, the zinc corrodes but the iron does not. If a sample of iron comes into contact with a sample of copper, the iron corrodes but the copper does not. Explain this phenomenon.arrow_forwardIf the combination of iron filings and sulfur in Question 25 is heated strongly, the iron reacts with the sulfur to form a solid that is no longer attracted by the magnet. Would this still represent a “mixture”? Why or why not?arrow_forward
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