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Butane (C₄H₁₀(g), Hf = –125.6 kJ/mol) reacts with oxygen to produce carbon dioxide (CO₂ , Hf = –393.5 kJ/mol ) and water (H₂O, Hf = –241.82 kJ/mol) according to the equation below. What is the enthalpy

GreenROBO asked Dec 27, 2024

by GreenROBO

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The molecular formula of allicin, the compound responsible for the characteristic smell of garlic, is C6H10OS2. How many sulfur atoms are present in 5.00 mg of allicin?

Amit Tiwary asked Dec 27, 2024

by Amit Tiwary

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5 votes

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The atom is the ________ unit of matter that retains the identity of the substance. A) smallest B) indivisible C) fundamental D) basic

Victorx asked Dec 27, 2024

by Victorx

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5 votes

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What is a reaction written with TWO arrows instead of one called ?

Drashti Dobariya asked Dec 27, 2024

by Drashti Dobariya

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1 answer

1 vote

179k views

A bond's modified duration cannot be larger than its Macaulay duration assuming a positive yield-to-maturity. (True/False)

Ruben Decrop asked Dec 27, 2024

by Ruben Decrop

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1 answer

4 votes

10.3k views

Write the empirical formulas for the following compounds: a) C₂H₅ b) CH₃O c) C₃H₈O₂ d) C₄H₁₀

Clarice Bouwer asked Dec 27, 2024

by Clarice Bouwer

8.3k points

1 answer

3 votes

214k views

What is the correct name for K2HPO4? a. dipotassium hydrogen phosphate b. potassium hydrogen phosphoxide c. potassium hydrogen phosphate d. potassium dihydrogen phosphate

Pat James asked Dec 27, 2024

by Pat James

8.0k points

2 answers

4 votes

29.0k views

The diagram below shows: •three of the pathways the alpha particles take. •the number of alpha particles detected at positions A, B and C. Determine the simplest ratio of the number of alpha particles

SammyT asked Dec 27, 2024

by SammyT

7.7k points

1 answer

3 votes

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Separating a compound requires a (chemical or physical) reaction. a) chemical b) physical c) both d) neither

Seanysull asked Dec 27, 2024

by Seanysull

8.0k points

1 answer

2 votes

221k views

What portion of Cheddar cheese is scattered over a loaded baked potato? A) 1 tsp B) 1 Tbl C) 1/2Tbl D) 1/2 cup

Dexty asked Dec 27, 2024

by Dexty

7.8k points

1 answer

5 votes

143k views

A reaction occurs between calcium metal and water to form aqueous calcium hydroxide and hydrogen gas. State one chemical evidence for this reaction.

Antoine Gamond asked Dec 27, 2024

by Antoine Gamond

8.1k points

1 answer

5 votes

192k views

For each of the following, fill in the blanks for all parts. 1. 12 m 10 m B=_ P = h=

Peter Smith asked Dec 27, 2024

by Peter Smith

6.8k points

1 answer

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119k views

Given that hotter blackbodies produce more energy than cooler blackbodies, why do cooler red giants have much higher luminosity than much hotter red dwarfs?

Tonycoupland asked Dec 27, 2024

by Tonycoupland

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1 answer

5 votes

182k views

How is the location of the functional group indicated in the molecular name?

Akhan asked Dec 27, 2024

by Akhan

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5 votes

139k views

Compare beryllium (Be) and strontium (Sr). Which element has the higher atomic radius? A) Beryllium B) Strontium C) They are the same. D) Cannot be determined.

Anastasya asked Dec 27, 2024

by Anastasya

8.6k points

1 answer

2 votes

104k views

A chemistry student needs 70.0 g of acetone for an experiment. By consulting the CRC Handbook of Chemistry and Physics, the student discovers that the density of acetone is 0.790 g/cm³. Calculate the volume

Ajtamwojtek asked Dec 27, 2024

by Ajtamwojtek

8.6k points

1 answer

0 votes

28.1k views

The energy level model of the nucleus describes nucleons residing in levels analogous to the energy level structure for electrons in atoms. Nuclear stability is then attributed to filled nucleon energy

Faulty Orc asked Dec 27, 2024

by Faulty Orc

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1 answer

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96.3k views

An atom has 11 protons, 10 electrons and 13 neutrons what is the mass number of the element?

Neha Chopra asked Dec 27, 2024

by Neha Chopra

8.1k points

1 answer

4 votes

52.0k views

With the *highest melting point of any pure element*, it is the *filament in ordinary *light bulbs*. Its one letter symbol comes from the name *wolfram.*

Alper asked Dec 27, 2024

by Alper

8.5k points

1 answer

4 votes

25.3k views

What is the following difference? 11√45 - 4.5 O 7.40 O 14√10 O 29.05 O 95.5

Javier Cuervas asked Dec 27, 2024

by Javier Cuervas

7.1k points

1 answer

0 votes

100k views

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