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In the equation ΔH = sum of ΔHf° products - sum of ΔHf° reactants, what does ΔHf° represent? A) Enthalpy change of formation B) Standard heat of reaction C) Molar heat capacity D) Bond dissociation energy

Joselito asked Oct 12, 2024

by Joselito

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Which of the following are properly balanced complete combustion reactions? I: CH4 (g) + 2 O2 (g) --> CO2 (g) + 2H20 II: C3H8 + 5 O2 --> 3 CO2 + 4 H20 III: C2H5OH + 3O2 --> 2 CO2 + 3H20

Aurelia Peters asked Oct 12, 2024

by Aurelia Peters

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5 votes

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What type of chemical reaction is the creation of milk plastic?

Yanick Girouard asked Oct 12, 2024

by Yanick Girouard

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If you drain a solution, will the molarity change, if so, will it increase or decrease? a) Molarity will increase. b) Molarity will decrease. c) Molarity will remain the same. d) Molarity will become zero.

Arnelism asked Oct 12, 2024

by Arnelism

7.9k points

1 answer

3 votes

163k views

The calorie is defined based on the specific heat capacity of what substance? A) H₂O B) Al C) Pb D) NH₂ E) Hg

Dewitt asked Oct 12, 2024

by Dewitt

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2 votes

181k views

Relationship between flow rate and density of a gas through flow-meter Linear relationship Non-linear relationship No relationship Exponential relationship

Erajuan asked Oct 12, 2024

by Erajuan

7.7k points

1 answer

5 votes

79.7k views

One mole of N₂O₄(g) at 300 K is kept in a closed container under one atmosphere. It is heated to 600K when 20% by mass of N₂O₄(g) decomposes to NO₂(g). The resultant pressure is: A. 1.2 atm B. 2.4 atm

Daniel Morritt asked Oct 12, 2024

by Daniel Morritt

7.8k points

1 answer

1 vote

44.1k views

If a fire was set to an area with a lot of man-made material, like plastics, what color would the smoke most likely be? a. Black. b. White. c. Gray. d. Rainbow-colored.

Emmanuelle Gouillart asked Oct 12, 2024

by Emmanuelle Gouillart

7.5k points

2 answers

4 votes

102k views

Calculations predict the following bond strengths for the pentafluorobenzene: 410.0 kJ/mol for the C−H bond and 525.0 kJ/mol for the C−F bond. NOTE: Bond strengths are directly related to force constants.

Tylercomp asked Oct 12, 2024

by Tylercomp

7.7k points

2 answers

4 votes

164k views

What does swern reagent (DMSO,(COCL2)/ET3N) do to a primary alcohol?

Ataur Rahman Munna asked Oct 12, 2024

by Ataur Rahman Munna

7.7k points

1 answer

2 votes

41.1k views

What is the difference between a bacteria cell and a human nervous cell?

Alex Dong asked Oct 12, 2024

by Alex Dong

7.9k points

1 answer

0 votes

182k views

Which of the following characteristics apply to nitrogen triiodide?1. non-polar molecule2. polar bonds3. trigonal-pyramidal molecular geometry4. sp2 hybridized

Gaurav Chauhan asked Oct 12, 2024

by Gaurav Chauhan

7.6k points

2 answers

4 votes

181k views

What happen when hydrogen reacts with nitrogen at necessary conditons?

M Karimi asked Oct 12, 2024

by M Karimi

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4 votes

15.7k views

Https://e2020.genl... Unit Test 21 Active 22 23 24 25 gas O liquid O plasma solid TIME REMAIN 01:47:3 Which state of matter is characterized by ionized particles, no definite shape or volume, and good

Daroczig asked Oct 12, 2024

by Daroczig

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1 answer

3 votes

205k views

What is ionization energy?

OneDimensionalmc asked Oct 12, 2024

by OneDimensionalmc

7.3k points

2 answers

3 votes

76.6k views

Which of the following materials must be refrigerated AND the refrigerator must be explosion-proof? a. Calcium chloride (dry) b. Hydrofluoric acid (in water) c. Toluene (liquid) d. Cumyl peroxide (solid)

Patrick DaVader asked Oct 12, 2024

by Patrick DaVader

7.3k points

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3 votes

184k views

Kate was drinking grape juice one morning at breakfast. She had been learning about solutions, so she started thinking about what the juice was made of.

Jorge Vieira asked Oct 12, 2024

by Jorge Vieira

7.4k points

1 answer

2 votes

37.2k views

Ethanol, C₂H₅OH, is removed from the bloodstream by a series of metabolic reactions. The data below were determined for the rate at which ethanol was removed from the blood of Suzy Student. Time (h) [C₂H₅OH]

UseLess Liang asked Oct 12, 2024

by UseLess Liang

7.8k points

1 answer

1 vote

58.4k views

What mass of KCl can be dissolved in 20 grams of water at 15.0°C? A) 10 grams B) 15 grams C) 20 grams D) 30 grams

Hugo Delsing asked Oct 12, 2024

by Hugo Delsing

7.7k points

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1 vote

161k views

A student mixed 100.00 mL of Ba(OH)2(aq) (unknown molarity) with 500.00 mL of 0.0200 M NAOH(aq) in a conical flask to make up Solution A. He then transferred 25.00 mL of Solution A to a 250.00-mL volumetric

Kristian Svensson asked Oct 12, 2024

by Kristian Svensson

7.7k points

1 answer

4 votes

148k views

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