Question

In: Chemistry

1. If all of the magnesium nitride that formed were not removed, would the final percentage...

1. If all of the magnesium nitride that formed were not removed, would the final percentage of Mg in the product calculates be too high or too low? Explain!

2.if some of the magnesium ribbon did not react, would the calculated percentage of Mg in the product be too high or too low? EXPLAIN


Solutions

Expert Solution

1. Suppose all magnesium reacts to produce magnesium nitride. We calculate the amount of magnesium. Now we calculate the amount of product magnesium nitride.

Percentage of magnesium = amount of magnesium×100/ amount of magnesium nitride

Amount of magnesium is measured by taking the weight of magnesium ribbon before the reaction.

Amount of magnesium nitride is measured after removing the magnesium nitride from the reaction system after the reaction ends. The mass of magnesium mitride is measured.

If all the magnesium nitride can not be determined then measured mass of magnesium nitride is less than the actual value.

So; the denominator of the percentage formula is less and the ratio of mass of magnesium / magnesium nitride increases.

For the reason; the calculated percentage of magnesium is higher than actual.

2.

If some magnesium did not react then the mass of magnesium that reacts is less than that of actial mass of magnesium ribbon.

So; numerator of the ratio ( mass of magnesium/mass of magnesium nitride) decreases and the ratio also decreases.

So; calculated percentage of Mg is less than the actual value.


Related Solutions

1. When heated, magnesium metal reacts with nitrogen from the air to form magnesium nitride. Write the balanced chemical equation (with phase symbols) for this reaction.
 1. When heated, magnesium metal reacts with nitrogen from the air to form magnesium nitride. Write the balanced chemical equation (with phase symbols) for this reaction.   2. Chromium metal reacts vigorously with hydrochloric acid, producing a green solution of chromium(III) chloride and hydrogen gas. The balanced equation for this reaction is: 2 Cr(s) + 6 HCI (aq) → 2 CrCl3 (aq) + 3 H2 (g) In an experiment, a 6.378 g piece of chromium is placed in a beaker containing excess HCI solution. a. What...
1. What are the functions of the spleen? If your spleen were removed [splenectomy], would you...
1. What are the functions of the spleen? If your spleen were removed [splenectomy], would you be able to fight off illness or infections effectively? Why or why not? 2. What is the role of the thymus in the human body? 3. If your tonsils are removed, how does your body develop an immune response against antigens in the throat? 4. The radical mastectomy is an operation in which a cancerous breast, surrounding tissues, and the underlying muscles of the...
If all tariffs on international trade in steel were removed, and subsidies to steel exporters around...
If all tariffs on international trade in steel were removed, and subsidies to steel exporters around the world were banned, who would benefit? Who would lose from such action?  
1. GDP includes a. All final goods. b. All final services. c. Both final goods and...
1. GDP includes a. All final goods. b. All final services. c. Both final goods and final services. 2. Which of the following is counted in US GDP? a. Used car purchased by a student for his commute to school b. Used oven purchased by a baker for her cake shop c. Drill purchased by a construction company d. b & c only e. None of the above 3. Which of the following is counted in US GDP? a. A...
1. Which of the following bonds would have the highest percentage change in value if all...
1. Which of the following bonds would have the highest percentage change in value if all interest rates in the economy decrease by 1%? Group of answer choices 20-year, zero coupon bond. 20-year, 5% coupon bond. 10-year, zero coupon bond. 1-year, 10% coupon bond. 20-year, 10% coupon bond. 2. Suppose you are signing a loan contract of $65,000 at an interest rate of 8.5%. You must make 5 equal payments at the end of the year for 5 years. How...
According to my records, the population of all past PSY 240 final percentage scores has a...
According to my records, the population of all past PSY 240 final percentage scores has a mean (μ) of 85 and standard deviation (σ) of 7 points. The new class of 36 students had a mean (M) final percentage score of 87 points. I conducted a hypothesis test to see if the new class would have significantly differently final percentage scores from the population of past students. I was interested in any type of “difference,” whether it’s an increase or...
Suppose that herbivores were removed from a temperate deciduous forest ecosystem. Predict what would happen to...
Suppose that herbivores were removed from a temperate deciduous forest ecosystem. Predict what would happen to the rate of nitrogen cycling. Explain the logic behind your prediction.
Provide the structure of the Diels-Alder product that would be formed if maleic anhydride were to...
Provide the structure of the Diels-Alder product that would be formed if maleic anhydride were to react with napthalene:
DirectTV is interested in conducting a study to determine the percentage of all their subscribers would...
DirectTV is interested in conducting a study to determine the percentage of all their subscribers would be willing to pay $90 per month for a premium cable package. What is the minimum size sample needed to estimate the population proportion with a margin of error of 0.03 or less at 96% confidence?
If Wild Widgets, Inc., were an all-equity company, it would have a beta of 1. The...
If Wild Widgets, Inc., were an all-equity company, it would have a beta of 1. The company has a target debt–equity ratio of .2. The expected return on the market portfolio is 10 percent, and Treasury bills currently yield 4.3 percent. The company has one bond issue outstanding that matures in 20 years and has a coupon rate of 7.6 percent. The bond currently sells for $1,110. The corporate tax rate is 34 percent. What is the company’s cost of...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT