CHEMISTRY HIGH SCHOOL

When the forward rate of reaction is greater than the reverse rate of reaction, the reaction has reached a state of balance called chemical equilibrium. True False

Answers

Answer 1
Answer: The correct answer is false. It is not chemical equilibrium when the forward rate of reaction is greater than the reverse rate of reaction. Instead, these two rates should be equal to achieve chemical equilibrium.

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List four properties of a candle

Answers

  1. Physical properties 
. Its soft 
. Its moldable 
. Its white/translucent without color added 
. Its insoluble in water 
. its soluble in benzene and ether 
. it melts around 120 degrees farenheit 

2. Chemical properties 
. It is a hydrocarbon with around 25 carbon atoms 
. it reacts with oxygen to form water vapor and CO2 
. its nonpolar (not sure if thats physical or chemical)

What’s the independent and dependent variable?

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Answer:

independent variable: a variable (often denoted by x ) whose variation does not depend on that of another.

dependent variable: a variable (often denoted by y ) whose value depends on that of another.

Explanation:

What is a spelling bee​

Answers

Answer: a contest in which you are eliminated if you fail to spell a word correctly.
a contest where you attempt to spell a series of words that you are given by the judges

How does thermal energy travel?

Answers

Thermal energy travels by conduction, convection, and radiation. It occurs when a cooler and warmer object touches each other. 
Thermal energy travels by conduction, convection, and radiation. Conduction occurs when two or more objects of different temperatures are touching each other. The heat flows from the warmer object to the cooler object, until the objects reach equal temperatures.
I hope this helps! :)

Given the reaction below: N2O4 (g) ⇌ 2 NO2 (g)Kc= 4.2
What is the equilibrium concentration of N2O4 if the equilibrium concentration of NO2 is 0.785 M?

Answers

N₂O₄ (g) ⇌ 2 NO₂ (g)

Kc = [ NO₂ ]² / [ N₂O₄ ]

4.2 =  [ 0.785 ] [ N₂O₄ ]

[ N₂O₄ ] = 4.2 / 0.785

[N₂O₄ ] = 5.350 M

hope this helps!

Does anyone know where i can find a practice cumulative chem test online?

Answers

exam board websites often have past papers from several previous years, if you know what exam board you are going to be using, try that, if not there may be content on the edexcel and AQA websites
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