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Offeltoffel asked Dec 26, 2024

by Offeltoffel

8.5k points

1 answer

3 votes

208k views

Calculate ΔHᵣₓₙ for the reaction: CH₄(g)+4Cl₂(g)⟶CCl₄(g)+4HCl(g) using the following information: C(s)+2H₂(g)⟶CH₄(g)ΔH=−74.6kJ C(s)+2Cl₂(g)⟶CCl₄(g)ΔH=−95.7kJ H₂(g)+Cl₂(g)⟶2HCl(g)ΔH=−92.3kJ a. -444.

AndersTornkvist asked Dec 26, 2024

by AndersTornkvist

8.8k points

1 answer

2 votes

89.5k views

Calculate the ph of a solution obtained by mixing 400ml of 0.10M hydrochloric acid with 600ml of 0.10M sodium hydroxide. Assume the combined volume is the sum of the two original volumes

Gozup asked Dec 26, 2024

by Gozup

8.4k points

1 answer

1 vote

205k views

NADH has a strong tendency to: 1) accept electrons 2) donate electrons 3) either donate or accept electrons depending on the electrochemical proton gradient

Milos K asked Dec 26, 2024

by Milos K

8.7k points

1 answer

4 votes

152k views

What is the sum of the given polynomials in standard form? A) 0 B) -3x^2 + 8x - 3 C) x^2 - 2x - 3 D) 3x^2 - 8x + 3 E) -x^2 + 2x - 3

DeepWebMie asked Dec 26, 2024

by DeepWebMie

7.7k points

1 answer

0 votes

74.5k views

Given the reactions: X(s) + 1/2 O2(g) ⟶ XO(s) ΔH = -817.3 kJ XCO3(s) ⟶ XO(s) + CO2(g) ΔH = +491.7 kJ What is the ΔH for the reaction: X(s) + 1/2 O2(g) + CO2(g) ⟶ XCO3(s)

Flovdis asked Dec 26, 2024

by Flovdis

8.3k points

1 answer

5 votes

142k views

What is the atomic number of the element with the noble-gas notation [Kr]5s 1 ? a. 35 b. 36 c. 37 d. 38

RoflcoptrException asked Dec 26, 2024

by RoflcoptrException

7.6k points

1 answer

5 votes

9.2k views

At 900°C, what is the equilibrium constant (Kp) for the reaction CaCO₃(s)? A) 1.09 B) 0.90 C) 2.00 D) 1.00

Maccullt asked Dec 26, 2024

by Maccullt

8.2k points

1 answer

4 votes

47.9k views

Consider the reaction between iodine gas and chlorine gas to form iodine monochloride: I₂(g)+Cl₂(g)?2ICl(g)Kp=81.9 (at 298 K) A reaction mixture at 298 K initially contains PI2=0.35atm and PCI₂=0.35atm

Brandon Schabell asked Dec 26, 2024

by Brandon Schabell

8.4k points

1 answer

3 votes

69.7k views

Quantitative analysis is carried out by a process called a. mass spectrometry b. magnetic spectrometry c. light spectrometry d. component spectrometry

Kevin Pedersen asked Dec 26, 2024

by Kevin Pedersen

8.1k points

1 answer

4 votes

71.9k views

A 0.0300 M NaCl solution was formed when 42.0 grams of NaCl was dissolved in enough water. What was the total volume of the solution formed? 15.7 liters 17.4 liters 21.2 liters 23.9 liters

Yalewzj asked Dec 26, 2024

by Yalewzj

8.4k points

1 answer

4 votes

213k views

If osmolarity goes up, O.P. And H.P. go _________.

Andranik asked Dec 26, 2024

by Andranik

7.7k points

1 answer

5 votes

783 views

Consider the following reaction. 2H2(g) + CO(g) + CH3OH(g) If AH° = 90 kJ for this reaction, which statement is true? a)The reaction is not spontaneous at any temperature. b)The reaction is entropy-driven.

Ceren asked Dec 26, 2024

by Ceren

8.5k points

1 answer

5 votes

129k views

Why should you never heat a refrigerant storage or recovery tank with an open flame? 1) It can cause an explosion 2) It can damage the tank 3) It can release harmful gases 4) It can contaminate the refrigerant

Sreenivas asked Dec 26, 2024

by Sreenivas

7.3k points

1 answer

4 votes

222k views

An atom with 3 protons and 2 electrons has a charge of _____ 1+ +3 0 +1

PRMoureu asked Dec 26, 2024

by PRMoureu

8.7k points

1 answer

4 votes

84.9k views

Which conversion factor would you use to solve the following problem? A) 11.9moles/1mole B) 11.9grams/1mole C) 11.9grams/1mole D) 11.9moles/1gram.

Timothy Steele asked Dec 26, 2024

by Timothy Steele

7.6k points

1 answer

0 votes

79.0k views

A fast moving electron produced in a nuclear reaction is called a ____. A. proton B. alpha-particle C. beta-particle D. neutron E. positron

Mouhammed Soueidane asked Dec 26, 2024

by Mouhammed Soueidane

7.9k points

1 answer

3 votes

23.7k views

A section of ileum stained with Fontana-Masson shows marked black precipitate on top of the sections. This could be prevented in the future by: a. using chemically cleaned glassware b. increasing the incubation

Rushisangani asked Dec 26, 2024

by Rushisangani

8.3k points

1 answer

1 vote

209k views

Why is it important to prepare samples of the right size for melting point analysis? a) To avoid wasting time b) To ensure accurate results c) To speed up the process d) To prevent equipment damage

Aliocee asked Dec 26, 2024

by Aliocee

8.6k points

1 answer

0 votes

9.7k views

23.9 g of NaCl in 881 mL of solution. Molarity:

SlappyTheFish asked Dec 26, 2024

by SlappyTheFish

8.3k points

1 answer

2 votes

69.3k views

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