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melamori03 [73]
3 years ago
13

Here is a chemical formula 3CO2 to the coefficient in the formula is

Chemistry
1 answer:
Flura [38]3 years ago
5 0
The coefficient for the chemical formula 3CO2 is the 3.
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How can two objects of similar shape and size have different densities
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The mass and Volume is different even thought they have a similar shape and size
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What are two factors that can affect salinity?
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precipitation and evaporation

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salinity :salt concentration

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evaporation: takes all the water and leaves the salt behind

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4 years ago
Select all the true statements regarding chemical equilibrium. the concentrations of reactants and products are equal. the conce
lys-0071 [83]
The true statements are B, C, and D
-first ( A ) the concentrations of reactants and products are equal is false, As the concentrations of reactants and products may be different from each other.
- But (B) the concentrations of reactants and product remains constant is true, as the equilibrium remains when there is no change in the concentration of the reactants and products.
-(c) reactants are being converted to products (and vise verse) is true also, as there are reactions still happened at a constant rate so it looks like nothing is happening.
5 0
4 years ago
¿Que ocurre cuando alteramos la temperatura de una disolución?
Gelneren [198K]

Answer: Explanation:

Temperatura. La solubilidad de un soluto en un determinado solvente principalmente depende de la temperatura. Para muchos sólidos disueltos en el agua líquida, la solubilidad aumenta con la temperatura hasta 100 °C,​ aunque existen casos que presentan un comportamiento inverso.

8 0
3 years ago
()
const2013 [10]

Answer:

\large \boxed{\text{-1276 kJ/mol}}

Explanation:

You calculate the energy required to break all the bonds in the reactants.

Then you subtract the energy needed to break all the bonds in the products.

                             CH₃CH₂OH        +  3O₂ ⟶ 2CO₂ + 3H₂O

Bonds:         5C-H 1C-C 1C-O 1O-H    3O=O     4C=O   6O-H

D/kJ·mol⁻¹:    413    347  358  467       495        799      467

\Delta H = \sum{D_{\text{reactants}}} - \sum{D_{\text{products}}}\\\sum{D_{\text{reactants}}} = 5 \times 413 + 1 \times 347 + 1 \times 358 + 1 \times 467 + 3 \times 495 = 3237 + 1485\\=\text{4722 kJ}\\\sum{D_{\text{products}}} = 4 \times 799 + 6 \times 467 =3196 + 2802 = \text{5998 kJ}\\\Delta H = 4722 - 5998= \textbf{-1276 kJ} \\ \text{The overall energy change is $\large \boxed{\textbf{-1276 kJ/mol}}$}.

6 0
3 years ago
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