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Bond [772]
3 years ago
11

What is the second most abundant element in earths crust?

Chemistry
1 answer:
FrozenT [24]3 years ago
8 0
C. Silicon

EXPLANATION

Silicon is the second most common element present in the crust with an abundance of 276,900 ppm or equivalent to 27.7%. The most abundant element is oxygen with 46.6%.
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This is a model of a normal chromosome
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3 years ago
What is the balanced equation for solid ammonium nitrate (NH4NO3) decomposes explosively to form nitrogen gas, oxygen gas, and w
Karolina [17]

Answer:

2NH4NO3 —> 2N2 + O2 + 4H2O

Explanation:

We begin by writing the skeletal equation as shown below:

NH4NO3 —> N2 + O2 + H2O

The equation can be balance as follow:

There are 4 atoms of H on the left side of the equation and 2 atoms on the right side. It can be balance by putting 2 in front of H2O as shown below:

NH4NO3 —> N2 + O2 + 2H2O

Now we have a total of 4 atoms of O on the left side and 3 atoms on the right side. It can be balance by putting 1/2 in front of O2 as shown below:

NH4NO3 —> N2 + 1/2O2 + 2H2O

Now, multiply through by 2 to clear the fraction as shown below

2NH4NO3 —> 2N2 + O2 + 4H2O

Now the equation is balanced

3 0
3 years ago
What evidence do you have that tpgs-750m increases the reaction rate? How does tpgs-750m act to increase the reaction rate?
notka56 [123]

TPGS-750 M conducts reaction under lower temperature then the reactions carried out in organic solvents.

<h3>What is tpgs-750m ?</h3>

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Learn more about Reaction rate here:

brainly.com/question/25724512

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