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When 0.617 0.617 g of sodium metal is added to an excess of hydrochloric acid, 6410 6410 J of heat are produced. What is the enthalpy of the reaction as written? 2Na(s)+2HCl(aq)⟶2NaCl(aq)+H₂(g) 2Na( s

Scarlett asked Dec 24, 2024

by Scarlett

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___ is defined as the production of a substance by the coming together of chemical elements, groups, of simpler compounds or by the degradation of a complex compound where simple molecules are built larger

Pocockn asked Dec 24, 2024

by Pocockn

8.2k points

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3 votes

216k views

What volume is occupied by 14.1 g of argon gas at a pressure of 1.50 atm and a temperature of 354 K ? Express your answer with the appropriate units. V = μA Value S Units ?

Jason Faulkner asked Dec 24, 2024

by Jason Faulkner

8.1k points

1 answer

1 vote

155k views

The standard enthalpy of formation of H₂O(l) at 298 K is -285.8 kJ/mol. Calculate the change in internal energy for the following process at 298 K and 1 atm: H₂O (l) → H₂ (g) + 1/2 O₂ (g) ∆E⁰=?

Dschatz asked Dec 24, 2024

by Dschatz

7.7k points

2 answers

0 votes

154k views

Which is MOST LIKELY a solid at room temperature? Question 4 options: Potassium (K) Argon (Ar) Neon (Ne) Hydrogen (H)

Joseph Rodriguez asked Dec 24, 2024

by Joseph Rodriguez

8.2k points

1 answer

3 votes

139k views

Which epidermal layer is often called the spiny layer? A) Stratum corneum B) Stratum lucidum C) Stratum granulosum D) Stratum spinosum

Bolot asked Dec 24, 2024

by Bolot

7.5k points

1 answer

0 votes

33.7k views

_________ (UEL)or the _________ (UFL): The most concentration of vapor or gas in the air that it flammable

Mossroy asked Dec 24, 2024

by Mossroy

8.0k points

1 answer

3 votes

50.3k views

Classify each of the following changes as physical or chemical. a) Melting of ice b) Burning of wood c) Dissolving sugar in water d) Rusting of iron

John Maclein asked Dec 24, 2024

by John Maclein

7.7k points

1 answer

2 votes

210k views

OPBr₃ (where p is the central atom) Lewis structure A) H - P - Br B) P ≡ O - Br C) Br - P = O D) O = P - Br₃

Beren asked Dec 24, 2024

by Beren

8.0k points

1 answer

4 votes

118k views

When large amounts of alcohol are used, the direct reading will tend to indicate a _____ air content. a) Higher b) Lower c) Constant d) Fluctuating

Ali Ashraf asked Dec 24, 2024

by Ali Ashraf

7.9k points

1 answer

1 vote

130k views

The pressure within a cylinder with a volume of 14.5L and 25°C is 530 torr. What is the new pressure when it is heated to 80°C and compressed to a volume of 5.7L?

Mogio asked Dec 24, 2024

by Mogio

8.1k points

1 answer

4 votes

97.8k views

Which of the following is the general valence electron configuration for the alkaline earth elements? Multiple choice question. A) ns1 B) ns2 C) ns2np2 D)ns2np1

Bvj asked Dec 24, 2024

by Bvj

8.0k points

1 answer

3 votes

134k views

Using the Brønsted theory, classify the compounds as either an acid or a base? 1) Acid 2) Base

Tekknolagi asked Dec 24, 2024

by Tekknolagi

8.1k points

1 answer

5 votes

16.8k views

What can make matter look different?

Ethan T asked Dec 24, 2024

by Ethan T

7.9k points

1 answer

0 votes

228k views

Our atmosphere is made up of 78% N2, 21% O2, and 1% other gases. What is the partial pressure of N2 when atmospheric pressure is 0.980 atm?

Az asked Dec 24, 2024

by Az

8.7k points

1 answer

4 votes

194k views

Rank the following ionic compounds, which have the same crystal structure, from least negative to most negative lattice energy: CsCl, CsBr, and CsI. Please explain. a) CsI, CsBr, CsCl b) CsBr, CsCl, CsI

DiligentKarma asked Dec 24, 2024

by DiligentKarma

8.7k points

1 answer

4 votes

175k views

How to find concentration of an acid from ph and pka values

Mariu asked Dec 24, 2024

by Mariu

8.2k points

1 answer

1 vote

29.4k views

Which electron configuration violates Hund's rule? a) [He]2s²2px²2py²2pz' b) [He]2s²2px²2py²2pz² c) [He]2s²2px²2py²2pz² d) [He]2s²2px²2py²2pz' e) [He]2s²2px²2py'2pz'

Samina asked Dec 24, 2024

by Samina

7.9k points

1 answer

4 votes

85.1k views

How do you know an element's principal quantum number easily? a) Mass number of the element b) Period number of the element c) Atomic number of the element d) Group number of the element

Snowcamel asked Dec 24, 2024

by Snowcamel

8.6k points

1 answer

0 votes

103k views

What mass of Fe is required to produce 32.00 g Fe₂O₃?

Rpayanm asked Dec 24, 2024

by Rpayanm

8.1k points

1 answer

5 votes

59.4k views

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