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Radda [10]
3 years ago
8

If you use about 4.5 x 1023 atoms of carbon in your pencil as you complete this

Chemistry
1 answer:
raketka [301]3 years ago
3 0

Answer:

0.74mol

Explanation:

4.5×10^23/6.02×10^23=0.74mol

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frozen [14]

Answer:

A. air pressure,this is answer.

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3 years ago
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Energy in Devices. An engineer needs to design a device that transforms light energy into sound energy. Describe a design for a
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Answer:

built a special cavity where the electromagnetic quantum states resonate with the natural vibrations of the atoms. In doing so, one cancouple a photon-based oscillator to a mechanical oscillator, controlling the mechanical quantum states with visible light. The result is a prototype of a quantum transducer, a device that converts light energy into mechanical energy (sound energy)

Explanation:

Sound energy is created by vibrating particles of medium that propagates as a wave. So in order to convert light (electromagnetic wave) to sound wave it has to be converted into electric or magnetic signals. Then these signals can be converted into sound waves.

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3 years ago
Consider the equilibrium reaction and its equilibrium constant expression. Br 2 ( g ) + 2 NO ( g ) − ⇀ ↽ − 2 NOBr ( g ) K = [ NO
zavuch27 [327]

Answer:

K_2=\frac{[NOBr]^4_{eq}}{[NO]^4_{eq}[Br]^2_{eq}}

Explanation:

Hello,

In this case, for the equilibrium condition, the equilibrium constant is defined via the law of mass action, which states that the division between the concentrations of the products over the concentration of the reactants at equilibrium equals the equilibrium constant, for the given reaction:

2 Br_2 ( g ) + 4 NO ( g ) \rightleftharpoons  4NOBr ( g )

The suitable equilibrium constant turns out:

K_2=\frac{[NOBr]^4_{eq}}{[NO]^4_{eq}[Br]^2_{eq}}

Or in terms of the initial equilibrium constant:

K_2=K_1^2

Since the second reaction is a doubled version of the first one.

Best regards.

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3 years ago
How many milliliters of 3.0M phosphoric acid can be made from 95mL of 5.0M solution?
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Thats a tuff one ummmmmm 4.5 m

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Which of the following statements correctly describes what happens in all chemical reactions?
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Bonds between atoms are broken/ or new bonds are formed

Explanation:

Due to chemical changes.

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3 years ago
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