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2 years ago

Provide a definition of a closed system.

Chemistry

2 answers:

Salsk061 [2.6K]2 years ago

8 0

Answer:

No idea

Explanation:

I don't know the answer. You're welcome!

tensa zangetsu [6.8K]2 years ago

5 0

Answer:

A closed system is a physical system that does not allow transfer of matter in or out of the system, though, in different contexts, such as physics, chemistry or engineering, the transfer of energy is or is not allowed.

Explanation:

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There are several reagents that can be used to effect addition to a double bond including: acid and water, oxymercuration–demerc

ExtremeBDS [4]

The answer & explanation for this question is given in the attachment below.

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3 years ago

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QUESTION 1

Svetlanka [38]

Answer:

Explanation:

Because nothing is left at the end of the reaction.

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3 years ago

Heptane and water do not mix, and heptane has a lower density (0.684 g/mL) than water (1.00 g/mL). A 100-mL graduated cylinder w

kicyunya [14]

Answer:

$h=100.8cm$

Explanation:

Hello,

In this case, considering the density and mass of both water and heptane we first compute the volume of each one:

$V_{water}=\frac{m_{water}}{\rho _{water}}=\frac{34g}{1.00g/mL}=34mL\\ \\V_{heptane}=\frac{m_{heptane}}{\rho _{heptane}}=\frac{34.6g}{0.684g/mL}=50.6mL\\$

Now, the total volume is:

$V=50.6mL+34mL=84.6mL$

Which is equal to:

$V=84.6cm^3$

Then, by knowing that the volume of a cylinder is πr²h or π(D/2)²h, we solve for the height as follows:

$h=\frac{V}{\pi (D/2)^2} \\\\h=\frac{84.6cm^3}{\pi (3.16cm/2)^2} \\\\h=100.8cm$

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3 years ago

The identity of an element depends on the number of

raketka [301]

Answer:

The answer would be:

Protons in the atom.

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3 years ago

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Match the following equation with the type of chemical reaction. Question 6 options: H2 + O2 ---> H2O HBr ---> H2 + Br2 HC

kenny6666 [7]

Hello there!

1. Synthesis: 2H₂ + O₂ → 2H₂O
2. Decomposition: 2HBr → H₂ + Br₂
3. Single-Replacement: 2Al + 3H₂SO₄ → 3H₂ + Al₂(SO₄)₃
4. Double-Replacement: 2HCl + 2NaOH → 2H₂O + 2NaCl
5. Combustion: 2C₂H₆ + 7O₂ → 6H₂O + 4CO₂

I hope this helps!
Brady

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3 years ago