**Educational Content: Chemistry Problems and Solutions** **Problem 4:** Only two isotopes of element X occur naturally. Isotope 1: atomic mass = 50.1373 amu, abundance = 82.40%. Isotope 2: atomic mass = 52.1396 amu, abundance = 17.60%. Find the atomic weight of element X. - (A) The correct answer is not shown. - (B) 50.25 amu - (C) 50.98 amu - (D) 51.36 amu - (E) 50.49 amu **Problem 5:** Sodium azide rapidly decomposes according to the reaction: \[ 2 \text{NaN}_3(s) \rightarrow 2 \text{Na}(s) + 3 \text{N}_2(g) \] How many grams of NaN₃ are required to form 11.300 g of nitrogen gas? - (A) 1.09e+01 g - (B) 1.99e+01 g - (C) The correct answer is not shown. - (D) 1.75e+01 g - (E) 4.78e+01 g **Problem 6:** Solutions of \(\text{Na}_2\text{CO}_3(\text{aq})\) and \(\text{AgNO}_3(\text{aq})\) react to form \(\text{Ag}_2\text{CO}_3(s)\) and \(\text{NaNO}_3(\text{aq})\). A solution containing 3.70 g \(\text{Na}_2\text{CO}_3\) is mixed with a solution containing 5.00 g \(\text{AgNO}_3\). How many grams of \(\text{Na}_2\text{CO}_3\) are present after the reaction is complete? - (A) 2.14e+00 g - (B) 1.08e+00 g - (C) 2.39e+00 g - (D) The correct answer is not shown. - (E) 4.80e+00 g **Problem 7:** Determine the oxidation number for Mn in
**Educational Content: Chemistry Problems and Solutions** **Problem 4:** Only two isotopes of element X occur naturally. Isotope 1: atomic mass = 50.1373 amu, abundance = 82.40%. Isotope 2: atomic mass = 52.1396 amu, abundance = 17.60%. Find the atomic weight of element X. - (A) The correct answer is not shown. - (B) 50.25 amu - (C) 50.98 amu - (D) 51.36 amu - (E) 50.49 amu **Problem 5:** Sodium azide rapidly decomposes according to the reaction: \[ 2 \text{NaN}_3(s) \rightarrow 2 \text{Na}(s) + 3 \text{N}_2(g) \] How many grams of NaN₃ are required to form 11.300 g of nitrogen gas? - (A) 1.09e+01 g - (B) 1.99e+01 g - (C) The correct answer is not shown. - (D) 1.75e+01 g - (E) 4.78e+01 g **Problem 6:** Solutions of \(\text{Na}_2\text{CO}_3(\text{aq})\) and \(\text{AgNO}_3(\text{aq})\) react to form \(\text{Ag}_2\text{CO}_3(s)\) and \(\text{NaNO}_3(\text{aq})\). A solution containing 3.70 g \(\text{Na}_2\text{CO}_3\) is mixed with a solution containing 5.00 g \(\text{AgNO}_3\). How many grams of \(\text{Na}_2\text{CO}_3\) are present after the reaction is complete? - (A) 2.14e+00 g - (B) 1.08e+00 g - (C) 2.39e+00 g - (D) The correct answer is not shown. - (E) 4.80e+00 g **Problem 7:** Determine the oxidation number for Mn in
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Thermochemistry
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Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
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Don't understand question 4
![**Educational Content: Chemistry Problems and Solutions**
**Problem 4:**
Only two isotopes of element X occur naturally. Isotope 1: atomic mass = 50.1373 amu, abundance = 82.40%. Isotope 2: atomic mass = 52.1396 amu, abundance = 17.60%. Find the atomic weight of element X.
- (A) The correct answer is not shown.
- (B) 50.25 amu
- (C) 50.98 amu
- (D) 51.36 amu
- (E) 50.49 amu
**Problem 5:**
Sodium azide rapidly decomposes according to the reaction:
\[ 2 \text{NaN}_3(s) \rightarrow 2 \text{Na}(s) + 3 \text{N}_2(g) \]
How many grams of NaN₃ are required to form 11.300 g of nitrogen gas?
- (A) 1.09e+01 g
- (B) 1.99e+01 g
- (C) The correct answer is not shown.
- (D) 1.75e+01 g
- (E) 4.78e+01 g
**Problem 6:**
Solutions of \(\text{Na}_2\text{CO}_3(\text{aq})\) and \(\text{AgNO}_3(\text{aq})\) react to form \(\text{Ag}_2\text{CO}_3(s)\) and \(\text{NaNO}_3(\text{aq})\). A solution containing 3.70 g \(\text{Na}_2\text{CO}_3\) is mixed with a solution containing 5.00 g \(\text{AgNO}_3\). How many grams of \(\text{Na}_2\text{CO}_3\) are present after the reaction is complete?
- (A) 2.14e+00 g
- (B) 1.08e+00 g
- (C) 2.39e+00 g
- (D) The correct answer is not shown.
- (E) 4.80e+00 g
**Problem 7:**
Determine the oxidation number for Mn in](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6e012739-811c-4430-b17d-4e5b1ae35dc7%2F14e75722-15af-42fb-b2eb-64dc8dac14e6%2F93x8c9e_processed.png&w=3840&q=75)
Transcribed Image Text:**Educational Content: Chemistry Problems and Solutions**
**Problem 4:**
Only two isotopes of element X occur naturally. Isotope 1: atomic mass = 50.1373 amu, abundance = 82.40%. Isotope 2: atomic mass = 52.1396 amu, abundance = 17.60%. Find the atomic weight of element X.
- (A) The correct answer is not shown.
- (B) 50.25 amu
- (C) 50.98 amu
- (D) 51.36 amu
- (E) 50.49 amu
**Problem 5:**
Sodium azide rapidly decomposes according to the reaction:
\[ 2 \text{NaN}_3(s) \rightarrow 2 \text{Na}(s) + 3 \text{N}_2(g) \]
How many grams of NaN₃ are required to form 11.300 g of nitrogen gas?
- (A) 1.09e+01 g
- (B) 1.99e+01 g
- (C) The correct answer is not shown.
- (D) 1.75e+01 g
- (E) 4.78e+01 g
**Problem 6:**
Solutions of \(\text{Na}_2\text{CO}_3(\text{aq})\) and \(\text{AgNO}_3(\text{aq})\) react to form \(\text{Ag}_2\text{CO}_3(s)\) and \(\text{NaNO}_3(\text{aq})\). A solution containing 3.70 g \(\text{Na}_2\text{CO}_3\) is mixed with a solution containing 5.00 g \(\text{AgNO}_3\). How many grams of \(\text{Na}_2\text{CO}_3\) are present after the reaction is complete?
- (A) 2.14e+00 g
- (B) 1.08e+00 g
- (C) 2.39e+00 g
- (D) The correct answer is not shown.
- (E) 4.80e+00 g
**Problem 7:**
Determine the oxidation number for Mn in
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