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Recent questions in Chemistry
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
8.2k
points
Chemistry
high-school
1
answer
2
votes
222k
views
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
7.9k
points
Chemistry
high-school
1
answer
5
votes
58.7k
views
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
8.0k
points
Chemistry
high-school
1
answer
5
votes
161k
views
What is a reaction written with TWO arrows instead of one called ?
Drashti Dobariya
asked
Dec 27, 2024
by
Drashti Dobariya
7.9k
points
Chemistry
college
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
8.4k
points
Chemistry
high-school
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
Chemistry
high-school
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
Chemistry
high-school
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
Chemistry
high-school
1
answer
3
votes
5.2k
views
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
Chemistry
high-school
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
Chemistry
high-school
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
Chemistry
high-school
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
Chemistry
high-school
1
answer
0
votes
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
8.5k
points
Chemistry
college
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
8.4k
points
Chemistry
high-school
1
answer
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
Chemistry
high-school
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
Chemistry
high-school
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
8.2k
points
Chemistry
high-school
1
answer
0
votes
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
Chemistry
high-school
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
Chemistry
high-school
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
Chemistry
high-school
1
answer
0
votes
100k
views
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