CHE101 Mod 4 ME

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Colorado State University, Global Campus *

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101

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Chemistry

Date

Feb 20, 2024

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docx

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Which is a neutralization reaction? That is correct! HCl(aq)+NaOH(aq)⟶NaCl(aq)+H 2 O(l) Cl 2 (aq)+H 2 O(l)⟶HCl(aq)+OH − (aq) CaCl 2 (aq)⟶Ca 2+ (aq)+2Cl − (aq) HCl(aq)+H 2 O(l)⟶H 3 O + (aq)+Cl − (aq) From the following balanced equation, 2H 2 (g)+O 2 (g)⟶2H 2 O(g) how many grams of H 2 O can be formed from 5.58g H 2 ? That is correct! 49.9g 0.624g 99.8g 5.54g In the chemical equation 2A+3B⟶C+4D , how many molecules of C can form if 6molecules of A react? That is correct! 1 molecule 2 molecules

3 molecules 6 molecules FEEDBACK Content attribution- Opens a dialog QUESTION 4· 1/1 POINTS What is the stoichiometric factor between N 2 and NO in the following balanced chemical equation? N 2 +O 2 ⟶2NO That is correct! 1N 2 :2NO 1N 2 :1NO 2N 2 :1NO 2N 2 :2NO FEEDBACK Content attribution- Opens a dialog QUESTION 5· 1/1 POINTS Balance the following equation: H 2 O 2 ⟶H 2 O+O 2 . That is correct! H 2 O 2 ⟶H 2 O+O 2 2H 2 O 2 ⟶2H 2 O+O 2

2H 2 O 2 ⟶2H 2 O+3O 2 H 2 O 2 ⟶ 32 H 2 O+O 2 How many atoms of copper are in 0.125g of copper? That's not right. 6.02×10 23 atoms 1.97×10 −3 atoms 4.78×10 24 atoms 1.18×10 21 atoms FEEDBACK Content attribution- Opens a dialog QUESTION 7· 0/1 POINTS What is oxidation? That's not right. Loss of electrons Gain of electrons Loss of oxygen atoms Gain of metal atoms From the following balanced equation, 2C 8 H 18 (l)+25O 2 (g)⟶16CO 2 (g)+18H 2 O(g) how many grams of H 2 O can be formed from 0.996g C 8 H 18 ?

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That is correct! 1.41g 0.0175g 8.96g 0.111g How many moles of retinol ( C 20 H 30 O ), a form of vitamin A, are in a 0.125g sample of retinol? That is correct! 4.36×10 −4 mol 35.8mol 3286.4mol 2290mol How many atoms of neon are in 0.378g of neon? That is correct! 6.02×10 23 atoms 1.87×10 −2 atoms 2.28×10 23 atoms 1.13×10 22 atoms

FEEDBACK Content attribution- Opens a dialog QUESTION 11· 1/1 POINTS Is the following reaction endothermic or exothermic? H 2 (g)+I 2 (g)+energy(heat)⟶2HI(g) That is correct! endothermic exothermic neither endothermic nor exothermic both endothermic and exothermic FEEDBACK Content attribution- Opens a dialog QUESTION 12· 1/1 POINTS Is the following reaction endothermic or exothermic? 2Al(s)+Fe 2 O 3 (s)⟶2Fe(s)+Al 2 O 3 (s)+energy(heat) That is correct! endothermic exothermic neither endothermic nor exothermic both endothermic and exothermic Sodium chloride is also known as table salt. The chemical formula of sodium chloride is NaCl . Calculate the molar mass of sodium chloride. That is correct!

67.51g/mol 58.44g/mol 12.46g/mol 815.0g/mol FEEDBACK Content attribution- Opens a dialog QUESTION 14· 0/1 POINTS Which chemical equation is stoichiometrically equivalent to CH 4 +2O 2 ⟶CO 2 +2H 2 O ? That's not right. 2CH 4 +O 2 ⟶2CO 2 +H 2 O 2CH 4 +2O 2 ⟶2CO 2 +2H 2 O CH 4 +O 2 ⟶CO 2 +H 2 O 2CH 4 +4O 2 ⟶2CO 2 +4H 2 O FEEDBACK Content attribution- Opens a dialog QUESTION 15· 1/1 POINTS Balance the following equation: X 2 +Y 2 ⟶XY 3 That is correct! X 2 +Y 2 ⟶XY 3

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2X 2 +Y 2 ⟶3XY 3 X 2 +3Y 2 ⟶2XY 3 X 2 +Y 2 ⟶2XY 3

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