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Recent questions in Chemistry
J. Tuzo Wilson, a Canadian scientists, developed the theory of plate tectonics based on what three (3) observations? 1) that there are cracks in the continents similar to the cracks found on the ocean
Tang Jiong
asked
Dec 24, 2024
by
Tang Jiong
8.6k
points
Chemistry
high-school
1
answer
5
votes
88.0k
views
How many ions are produced from a 14.3 g sample of calcium nitrate
Cvsguimaraes
asked
Dec 24, 2024
by
Cvsguimaraes
8.4k
points
Chemistry
high-school
1
answer
4
votes
25.2k
views
What type of iron is the result of this more advanced iron refinery (the blast furnace)?
MoonGoose
asked
Dec 24, 2024
by
MoonGoose
8.1k
points
Chemistry
high-school
1
answer
2
votes
230k
views
Which of the following class B foams should be used when ethanol is the known material involved? A) Aqueous Film-Forming Foam (AFFF) B) Alcohol-Resistant Aqueous Film-Forming Foam (AR-AFFF) C) Protein
Belvi Nosakhare
asked
Dec 24, 2024
by
Belvi Nosakhare
9.0k
points
Chemistry
high-school
1
answer
2
votes
216k
views
Explain how 2-chloro-3-methylbutane on treatment with alcoholic potash given 2-methyl but-2ene as the major product.
Dossani
asked
Dec 24, 2024
by
Dossani
8.8k
points
Chemistry
high-school
1
answer
0
votes
63.5k
views
What is required to process Fe and N from food? A) Light B) Oxygen C) Water D) Digestive enzymes
Gandhi
asked
Dec 24, 2024
by
Gandhi
9.2k
points
Chemistry
high-school
1
answer
1
vote
212k
views
Label the given reaction as endothermic or exothermic. 1) Endothermic 2) Exothermic
GEOCHET
asked
Dec 24, 2024
by
GEOCHET
8.8k
points
Chemistry
high-school
1
answer
4
votes
58.3k
views
Which chemical reaction best represents aerobic respiration? a. 6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂ b. C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂ c. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O d. 2C₂H₅OH + 2CO₂ → C₆H₁₂O₆
Christian Fritz
asked
Dec 24, 2024
by
Christian Fritz
8.4k
points
Chemistry
high-school
1
answer
2
votes
8.9k
views
Which of the following forms of Bromine has the LARGEST ionic radius? A. Br B. Br- C. Br+
Sushruth
asked
Dec 24, 2024
by
Sushruth
7.7k
points
Chemistry
high-school
1
answer
1
vote
159k
views
Balance the following equation: NHa(g) + F2(g) - NaF4(g) + HF(g) a. How many moles of each reactant are needed to produce 4.00 moles of HF? b. How many grams of F2 are required to react with 1.50 moles
Bilal
asked
Dec 24, 2024
by
Bilal
7.9k
points
Chemistry
college
1
answer
4
votes
102k
views
Which of the following is considered a base? (a) Mg(OH)₂ (b) C₆H₅COOH (c) CH₃COOH (d) none of the above
Pnj
asked
Dec 24, 2024
by
Pnj
7.5k
points
Chemistry
high-school
1
answer
3
votes
40.7k
views
In the context of the reaction/recovery process, which statement accurately describes the relationship between speed and reaction/recovery time? a) Reaction time and recovery time are independent of each
Kyle Howells
asked
Dec 24, 2024
by
Kyle Howells
7.7k
points
Chemistry
high-school
1
answer
2
votes
177k
views
calculate the entropy change when 0.02 mol of an ideal gas (Cv= 12.6 j/mol.k) is heated from 25⁰C to 100⁰C so that its volume is al
Dave Ward
asked
Dec 24, 2024
by
Dave Ward
7.7k
points
Chemistry
high-school
1
answer
5
votes
20.1k
views
How do the lattice enthalpies of NaCl and NaF compare?
Sam YC
asked
Dec 24, 2024
by
Sam YC
8.5k
points
Chemistry
high-school
1
answer
4
votes
225k
views
Which of the following pairs of elements have same number of valence electrons? (1) Sodium and magnesium (2) Carbon and nitrogen (3) Oxygen and sulphur (4) Potassium and calcium
Jbrehr
asked
Dec 24, 2024
by
Jbrehr
7.5k
points
Chemistry
high-school
2
answers
1
vote
60.0k
views
What is the use of these apparatus? Crusible Descicator Deflagrating spoon
Ralfeus
asked
Dec 24, 2024
by
Ralfeus
8.4k
points
Chemistry
high-school
1
answer
0
votes
64.3k
views
Which of these is a chemical property of a substance? 10 tatue O reactivity O conductivity
Jonsuh
asked
Dec 24, 2024
by
Jonsuh
8.2k
points
Chemistry
college
1
answer
4
votes
46.0k
views
the aquatic plant elodea was placed in distilled water and a 10% sodium chloride solution. which caused the cells to swell? what keeps the cells from bursting?
Kolleen
asked
Dec 24, 2024
by
Kolleen
7.8k
points
Chemistry
high-school
1
answer
3
votes
65.7k
views
6.1 Trace Minerals Homework Unanswered Which of the following minerals is needed in the daily diet in trace amounts? Select an answer and submit. For keyboard navigation, use the up/down arrow keys to
Javier Delgado
asked
Dec 24, 2024
by
Javier Delgado
8.7k
points
Chemistry
high-school
1
answer
3
votes
13.9k
views
Unstable isotopes can be useful A) in medical diagnosis. B) in vitamins. C) in the formation of hydrogen bonds. D) catalysts. E) as buffers.
PEPEGA
asked
Dec 24, 2024
by
PEPEGA
8.7k
points
Chemistry
high-school
1
answer
2
votes
146k
views
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