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makvit [3.9K]
3 years ago
14

When hydrogen is burned in the presence of oxygen it will form water, as per the equation: 2H2 + O2 -> 2H2O. Which types of r

eactions does this fall under?
I. synthesis
II. decomposition
III. single replacement
IV. double replacement
V. combustion



A. I, II, and III
B. I and V
C. II, III, and IV
D. II and IV
Chemistry
1 answer:
nadya68 [22]3 years ago
4 0

Answer:

B

Explanation:

Hydrogen is synthesized to water by adding Oxygen.

Hydrogen is oxidised to water by combustion ( burning in presence of oxygen).

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Marizza181 [45]

-Acids release hydrogen ions

-Acids taste sharp

-Some Acids can cause serious burns

The answer is "All of the above"

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<em>Hope this helps! Please mark brainliest!!!</em>

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3 years ago
On average, tectonic plates move approximately 3 cm per year; about as fast as your fingernails grow
V125BC [204]
True the answer is true :) have a nice day
5 0
3 years ago
Use the normal boiling points: propane, C3H8, –42.1˚C; butane, C4H10, –0.5˚C; pentane, C5H12, 36.1˚C; hexane, C6H14, 68.7˚C; hep
svlad2 [7]

Answer:

The answer to your question is 126.1°C

Explanation:

                  Boiling point         Difference of boiling points  

C₃H₈             - 42.1°C

C₄H₁₀             -   0.5°C                 41.6 °C

C₅H₁₂               36.1°C                  36.6°C                       41.6 - 36.6 = 5°C          

C₆H₁₄               68.7°C                 32.6°C                        36.6 - 32.6 =4°C

C₇H₁₆               98.4°C                 29.7°C                        32.6 - 29.7 = 2.9°C

We can observe on the table that the difference of boiling points diminishes 1°C when the hydrocarbon has one more carbon, then the difference of temperature between the hydrocarbon of 8 carbons and the hydrocarbon of 7 carbons must be 2°C.

So, this difference is 29.7°C - 2°C = 27.7°C.

And the boiling point of octane is approximately 98.4 + 27.7°C = 126.1°C

7 0
3 years ago
The chemical formula is different from the empirical formula in
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Answer:be careful and relax

Explanation:

7 0
3 years ago
Read 2 more answers
Determine the missing species in these transmutations, and write a full nuclear equation from the shorthand notation:(b) ²⁸Si (d
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Shorthand notations are a part of the Wolfram Language's rich syntax system that allows multiple ways to feed arguments to functions. In addition to creating compact code, using shorthand notation lets you customize your workflow in the Wolfram Language.

<h3>What is the shorthand notation of an atom?</h3>

Often, a shorthand method is used that lists only those electrons in excess of the noble gas configuration immediately preceding the atom in the periodic table. For example, sodium has one 3s electron in excess of the noble gas neon (chemical symbol Ne, atomic number 10), and so its shorthand notation is [Ne]3s1.

<h3>How do you write shorthand configuration?</h3>

In shorthand electron configuration, the electron configuration starts with the symbol of the noble gas in the previous period, followed by the additional configuration of the electrons for the given element. For example, aluminum has the atomic number 13, which is the number of protons in the nuclei of its atoms.

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2 years ago
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