Homework Answers
1) In a physical change the matter doesn't change into another, just its appearance changes: the freezing of water just involves a change in the form of the substance but the water is still being water.
2) A chemical change involves the transformation of one substance into another: when a candle burns, the resins that form the candle transform into combustion products: CO2 and water; on the other hand, oxidation involves the reaction of a metal with oxygen to form a new compound: a metal oxide.
3) A chemical equation must include the substances that will react (reagents), each one separated by a plus sign, and the produced substances (products), each one separated by a plus sign. Reagents and products are separated by an arrow.
4) In a combination reaction two or more compounds react to produce a single product whereas in a decomposition reaction one reagent produces two or more products.
Add Answer to:
Name Date Section Team Instructor Pre-Lab Study Questions 1. Why is the freezing of water called...
Pre-Lab Study Questions - Lab 9 (Reaction Stoichiometry and Moles) Date: Name: Section: Team: Instructor: 1....
Pre-Lab Study Questions - Lab 9 (Reaction Stoichiometry and Moles) Date: Name: Section: Team: Instructor: 1. In the formula Mgo, what is the relative mass ratio of magnesium to oxygen? What is the "count ratio of magnesium to oxygen in MgO? Why are the two ratios different? NNNNNNNNNNNNNNNNN11111111111111111 2. Write a balanced equation for the reaction of sodium and sulfur to form sodium sulfide. 3. Using the equation above, how many grams of sulfur are consumed with 0.750 g of...
CH 112 Date Section Instructor Name Team Pre-Lab Questions 1. What is the difference between an...
CH 112 Date Section Instructor Name Team Pre-Lab Questions 1. What is the difference between an Arrhenius base and a Brønsted-Lowry base? 2. Why are acid-base reactions called neutralization reactions? 3. What does the pH of a solution tell you? : Properties of Acids and Bases Acid Base Neutral af with Unknown
Carboxylic A Report Sheet Date Nov. 8,2019 Section Name Hollis Hunter Team Instructor Pre-Lab Study Questions...
Carboxylic A Report Sheet Date Nov. 8,2019 Section Name Hollis Hunter Team Instructor Pre-Lab Study Questions 1. What are esters? 2. Why are buffers added to some aspirin products? 3. Old aspirin sometimes smells like vinegar. Why? A. Carboxylic Acids and Their Salts Acetic Acid Benzoic Acid A.1 Condensed structural formulas A.2 Solubility in cold water A3
Date Section Name Team Shiny, light grey_n boon 36.74 REPORT SHEET LAB Moles and Chemical Formulas...
Date Section Name Team Shiny, light grey_n boon 36.74 REPORT SHEET LAB Moles and Chemical Formulas 110 A. Finding the Simplest Formula 36.58 1. Mass of empty crucible + cover 2. Initial appearance of the magnesium 3. Mass of crucible + cover + magnesium 4. Mass of crucible + cover + oxide product - 36.94 Calculations 5. Mass of magnesium 6. Mass of magnesium compound 7. Mass of oxygen in the product 8. Moles of Mg - mole (Show calculations.)...
Name Desk Date _Laboratory Instructor 30 Pre-lab Questions Rates of Chemical Reactions II: Rate and Order...
Name Desk Date _Laboratory Instructor 30 Pre-lab Questions Rates of Chemical Reactions II: Rate and Order of H2O2 Decomposition Before beginning this experiment in the laboratory, you should be able to answer the following questions. 1. What four factors may influence the rate of a reaction? 2. Assume that the rate law for a reaction is rate=AB. a) What is the overall order of the reaction? (b) If the concentration of both A and B are doubled, how will this...
Team Instructor 11 Pre-Lab Study Questions 1. What is meant by the simplest formula of a...
Team Instructor 11 Pre-Lab Study Questions 1. What is meant by the simplest formula of a compound? 2. How does a hydrate differ from an anhydrate? 3. What happens when a hydrate is heated? 4. A hydrate of CoCl, with a mass of 6.00 g is heated strongly. After cooling, the mass of the anhydrate is 3.27 g a. How many grams of H,O were lost from the hydrate? b. What is the % water in the hydrate? e. What...
Name: Pavi kaur Partner: Alyssa Instructor initials, Week 1 Instructor initials, Week 2: CHEM 121 Lab...
Name: Pavi kaur Partner: Alyssa Instructor initials, Week 1 Instructor initials, Week 2: CHEM 121 Lab Clark College Experiment 7: Reaction of Magnesium Metal with Hydrochloric Acid Adapted from Bassow by Mermil Parry & Content Goals: Write and balance chemical equations. Determine which gas law(s) are necessary in problem-solving situations Use gas laws and experimental data to solve experimental problems. Process Goals Read and follow complex instructions. Construct and organize a data table. Accurately measure volumes Solve problems that combine...
Pre-Lab Questions 1. Describe the hazards associated with each of the materials listed below. (2 points...
Pre-Lab Questions 1. Describe the hazards associated with each of the materials listed below. (2 points each) a. Burning Mg ribbon b. 2 M HCI C. H gas 2. Distinguish between exothermic and endothermic reactions. (2 points) 3. Identify the general reaction type for each of the following reactions: (4 points each) a. N. (8) + 3H,(g) → 2 NH (8) b. NaOH(aq) + HCl(aq) → NaCl (aq) + H,O (1) c. Cu (s) + 2 AgNO, (aq) → Cu(NO),...
Date Post-Lab Questions If your partner did not take into account the vapor pressure of water whe...
Date Post-Lab Questions If your partner did not take into account the vapor pressure of water when calculating the moles of hydrogen produced, would the mass of Mg that was calculated at the end of the experiment be too high or too low? nced haf t ribbon are coated with white MgO, would this cause the mass of Mg that you calculate to be too high or too low? Why? 3. Instead of a strip of pure Mg nibbon, you...
& cruciblu tungs evap "Brill. I gradu Part I. Combination 1. Obtain a 1-inch piece of...
& cruciblu tungs evap "Brill. I gradu Part I. Combination 1. Obtain a 1-inch piece of magnesium ribbon. Hold the piece of Mg ribbon with your crucible e tongs and ignite it with your Bunsen burner. Caution! Do not look directly at the burning rib- bon. TABLE 9.6 Observations combustion of magnesium ribbon Sparks were present. Bright light came out just when it was burned enough Color Enange towhite 7 and the piece That was bumed was broken to pieces....
Pre-Lab Study Questions - Lab 9 (Reaction Stoichiometry and Moles) Date: Name: Section: Team: Instructor: 1. In the formula Mgo, what is the relative mass ratio of magnesium to oxygen? What is the "count ratio of magnesium to oxygen in MgO? Why are the two ratios different? NNNNNNNNNNNNNNNNN11111111111111111 2. Write a balanced equation for the reaction of sodium and sulfur to form sodium sulfide. 3. Using the equation above, how many grams of sulfur are consumed with 0.750 g of...
CH 112 Date Section Instructor Name Team Pre-Lab Questions 1. What is the difference between an Arrhenius base and a Brønsted-Lowry base? 2. Why are acid-base reactions called neutralization reactions? 3. What does the pH of a solution tell you? : Properties of Acids and Bases Acid Base Neutral af with Unknown
Carboxylic A Report Sheet Date Nov. 8,2019 Section Name Hollis Hunter Team Instructor Pre-Lab Study Questions 1. What are esters? 2. Why are buffers added to some aspirin products? 3. Old aspirin sometimes smells like vinegar. Why? A. Carboxylic Acids and Their Salts Acetic Acid Benzoic Acid A.1 Condensed structural formulas A.2 Solubility in cold water A3
Date Section Name Team Shiny, light grey_n boon 36.74 REPORT SHEET LAB Moles and Chemical Formulas 110 A. Finding the Simplest Formula 36.58 1. Mass of empty crucible + cover 2. Initial appearance of the magnesium 3. Mass of crucible + cover + magnesium 4. Mass of crucible + cover + oxide product - 36.94 Calculations 5. Mass of magnesium 6. Mass of magnesium compound 7. Mass of oxygen in the product 8. Moles of Mg - mole (Show calculations.)...
Name Desk Date _Laboratory Instructor 30 Pre-lab Questions Rates of Chemical Reactions II: Rate and Order of H2O2 Decomposition Before beginning this experiment in the laboratory, you should be able to answer the following questions. 1. What four factors may influence the rate of a reaction? 2. Assume that the rate law for a reaction is rate=AB. a) What is the overall order of the reaction? (b) If the concentration of both A and B are doubled, how will this...
Team Instructor 11 Pre-Lab Study Questions 1. What is meant by the simplest formula of a compound? 2. How does a hydrate differ from an anhydrate? 3. What happens when a hydrate is heated? 4. A hydrate of CoCl, with a mass of 6.00 g is heated strongly. After cooling, the mass of the anhydrate is 3.27 g a. How many grams of H,O were lost from the hydrate? b. What is the % water in the hydrate? e. What...
Name: Pavi kaur Partner: Alyssa Instructor initials, Week 1 Instructor initials, Week 2: CHEM 121 Lab Clark College Experiment 7: Reaction of Magnesium Metal with Hydrochloric Acid Adapted from Bassow by Mermil Parry & Content Goals: Write and balance chemical equations. Determine which gas law(s) are necessary in problem-solving situations Use gas laws and experimental data to solve experimental problems. Process Goals Read and follow complex instructions. Construct and organize a data table. Accurately measure volumes Solve problems that combine...
Pre-Lab Questions 1. Describe the hazards associated with each of the materials listed below. (2 points each) a. Burning Mg ribbon b. 2 M HCI C. H gas 2. Distinguish between exothermic and endothermic reactions. (2 points) 3. Identify the general reaction type for each of the following reactions: (4 points each) a. N. (8) + 3H,(g) → 2 NH (8) b. NaOH(aq) + HCl(aq) → NaCl (aq) + H,O (1) c. Cu (s) + 2 AgNO, (aq) → Cu(NO),...
Date Post-Lab Questions If your partner did not take into account the vapor pressure of water when calculating the moles of hydrogen produced, would the mass of Mg that was calculated at the end of the experiment be too high or too low? nced haf t ribbon are coated with white MgO, would this cause the mass of Mg that you calculate to be too high or too low? Why? 3. Instead of a strip of pure Mg nibbon, you...
& cruciblu tungs evap "Brill. I gradu Part I. Combination 1. Obtain a 1-inch piece of magnesium ribbon. Hold the piece of Mg ribbon with your crucible e tongs and ignite it with your Bunsen burner. Caution! Do not look directly at the burning rib- bon. TABLE 9.6 Observations combustion of magnesium ribbon Sparks were present. Bright light came out just when it was burned enough Color Enange towhite 7 and the piece That was bumed was broken to pieces....
Most questions answered within 3 hours.
-
3. Gains from trade
Consider two neighbouring island countries called Euphoria and
Contente. They each have...
asked 34 minutes ago -
A business executive has the option to invest money in two
plans: Plan A guarantees that...
asked 2 hours ago -
Hello, can someone please help me answer this question?
How much heat is absorbed by a...
asked 2 hours ago -
. A marketing researcher conducted a survey of 25 shoppers
randomly selected at the local mall...
asked 3 hours ago -
Create an comprehensive response to the
following:
Antimicrobial agents work on a multitude of microbes (bacteria,...
asked 3 hours ago -
6.13 LAB: Step counter. Section 6.3.
A pedometer treats walking 2,000 steps as walking 1 mile....
asked 3 hours ago -
(14.2) A block of mass m = 10 kg riding on a frictionless
horizontal plane is...
asked 3 hours ago -
Use any search engine to search for articles about Starbucks
partnership with Tata Companies in India...
asked 3 hours ago -
Let’s say that for some reason Bank Excess Reserves suddenly
increase sharply. What effect would this...
asked 3 hours ago -
Given:
Curent Assets: $600,000
Total Assets: $2,600,000
Current Liabilities: $500,000
Total Liabilities: $1,700,000
What is the...
asked 3 hours ago -
1. What is a “Bankster”? What is insider trading? Why is it
illegal?
2. What is...
asked 3 hours ago -
A transverse wave on a cord is given by
D(x,t)=0.18sin(2.7x−61.0t), where Dand x are in m...
asked 3 hours ago