Recent questions in Chemistry

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Calculate the standard enthalpy change for the reaction 4a + 2b → 2ab + a2?

Silintzir asked Oct 7, 2024

by Silintzir

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1 answer

1 vote

234k views

What mass of HI should be present in 0.200 L of solution to obtain a solution with each of the following pH's? pH= 1.20 a) 0.010 g b) 0.025 g c) 0.050 g d) 0.100 g

Vim asked Oct 7, 2024

by Vim

7.9k points

1 answer

2 votes

169k views

Which of the following corresponds to an isotonic solution? (a) 0.28 Osm (b) 350 mOsm (c) 265 mOsm (d) more than one of these?

Abdulrahman Bahaml asked Oct 7, 2024

by Abdulrahman Bahaml

7.9k points

1 answer

2 votes

4.4k views

Which set of coefficients will balance this chemical equation? __N2(g) + __H2(g) → NH3(g)

Arkay Mann asked Oct 7, 2024

by Arkay Mann

7.2k points

1 answer

0 votes

3.5k views

How many moles of N₂ reacted if 0.85 mol of NH₃ is produced?

Ed Trujillo asked Oct 7, 2024

by Ed Trujillo

8.6k points

1 answer

1 vote

67.5k views

A tank contains 1500 L of argon gas. The pressure is 11690 kPa and the temperature is 35ºC. How many moles of argon are in the tank? Show your work

SyndicatorBBB asked Oct 7, 2024

by SyndicatorBBB

7.7k points

2 answers

2 votes

85.1k views

So for an acis to neutralize a base we should have equal numebr od maoles of the hyfrogen and hyfroxidde iuons?

Emptyflash asked Oct 7, 2024

by Emptyflash

7.8k points

1 answer

3 votes

188k views

What is the role of the Clinical Nurse Leader (CNL) in the Phonological approach to patient care? a. Providing direct patient care b. Developing treatment plans c. Analyzing speech patterns d. Assessing

Charkan asked Oct 7, 2024

by Charkan

7.5k points

1 answer

3 votes

91.8k views

What is the major crystalline salt of the bone?

Halest asked Oct 7, 2024

by Halest

8.4k points

1 answer

3 votes

201k views

The rate constant for a first-order reaction is 0.54 M-1s-1. What is the half-life of this reaction if the initial concentration is 0.27 M? a.) 1.3 s b.) 0.25 s c.) 5.0 s d.) 2.0 s e.) 6.9 s

DoubleDouble asked Oct 7, 2024

by DoubleDouble

7.9k points

1 answer

0 votes

25.2k views

This property of water helps make it the universal solvent: _____. Responses A solvencysolvency B polarity

Derek Kite asked Oct 7, 2024

by Derek Kite

8.0k points

2 answers

2 votes

5.9k views

What is the effect of methylation of H3 at lysine residue 4 (K4)?

Leszek Zarna asked Oct 7, 2024

by Leszek Zarna

8.1k points

1 answer

3 votes

139k views

Which statement explains why ice floats in liquid water? A. Water molecules maintain the same bent shape in liquid and solid states. B. As water molecules go from the liquid to the solid state, their rate

Cobolstinks asked Oct 7, 2024

by Cobolstinks

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3 votes

223k views

A Sodium ion (Na+) is oxymoronic with which of its nearest noble gases? A) Neon (Ne) B) Argon (Ar) C) Krypton (Kr) D) Xenon (Xe) E) Radon (Rn)

Ana Llera asked Oct 7, 2024

by Ana Llera

7.4k points

1 answer

2 votes

214k views

If a gas has 1.82 L of volume at 267°C, what is the volume of the gas if the temperature is raised to 350°C? A. Data provided is insufficient to calculate the new volume. B. The volume increases to a specific

Jacob Pavlock asked Oct 7, 2024

by Jacob Pavlock

8.2k points

1 answer

0 votes

25.9k views

How many hydrogen atoms are in 2 moles of h2o?

Ballack asked Oct 7, 2024

by Ballack

8.0k points

1 answer

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48.2k views

Joseph Priestley first prepared pure oxygen by heating mercuric oxide, HgO: 2HgO(s)⟶2Hg(l)+O₂(g) a) What is the balanced chemical equation for the preparation of oxygen by heating mercuric oxide? b) How

Orlox asked Oct 7, 2024

by Orlox

8.2k points

1 answer

3 votes

68.4k views

47) What is the molality of a solution prepared by dissolving 317 g of CaCl2 into 2.50 kg of water?

Durul Dalkanat asked Oct 7, 2024

by Durul Dalkanat

9.2k points

1 answer

5 votes

163k views

How much silver can be recovered from 124 g of Ag₂S? 42.7 g 62.1 g 93.2 g 124 g

Gkb asked Oct 7, 2024

by Gkb

8.0k points

1 answer

2 votes

175k views

What is the poly-proline type II helix stabilized by? A) Hydrogen bonds B) Disulfide bonds C) Peptide bonds D) Van der Waals forces

Cornholio asked Oct 7, 2024

by Cornholio

7.7k points

1 answer

5 votes

42.2k views

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