Answer:
8×10^(-3) mol/L
Explanation:
The formula for finding the hydrogen ion concentration is...
[H⁺] = 10^-ph
[H⁺] = 10^(-2.1)
[H⁺] = 0.00794...mol/L = 8×10^(-3) mol/L
The answer is to 1 significant digit because the pH has one decimal place.
Yes i do know what this question is.
<span>The statement is false. It was Democritus, a Greek
philosopher, who first theorized that matter was ultimately composed of atoms.
His ideas were not widely accepted in his time (460-370 B.C), but during the 19th
century, John Dalton proposed this theory and gained broad acceptance.</span>
Answer:
1C₆H₁₂O₆(s) + 6O₂(g) → 6CO₂(g) + 6H₂O(l)
Explanation:
In general equation combustions where all carbon produce CO₂ and all hydrogen H₂O we must begin the balance with these two species:
_C₆H₁₂O₆(s) + _O₂(g) → _CO₂(g) + _H₂O(l)
If sugar is 1, CO₂ and H₂O must be:
1C₆H₁₂O₆(s) + _O₂(g) → 6CO₂(g) + 6H₂O(l)
Thus, C and H are balanced. In the right side we have 12 oxygen from CO₂ + 6 oxygen from H₂O = 18 oxygen
In the left there are 6, thus, O₂ must provide 12 oxygens, thus:
<h3>
1C₆H₁₂O₆(s) +
6O₂(g) →
6CO₂(g) +
6H₂O(l)</h3>
And this is the balanced reaction
0.903 mol of PCl₅ can be produced from 28.0 g of P₄ (and excess Cl₂).
<h3>What is Stoichiometry ?</h3>
Stoichiometry helps us to use the balanced chemical equation to measure the quantitative relationship and it is to calculate the amount of product and reactants that are given in a reaction.
<h3 /><h3>What is Balanced Chemical Equation ?</h3>
The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
Now write the balanced chemical equation
P₄ + 10 Cl₂ → 4PCl₅
1 mole of P₄ react with 10 mole of Cl₂ produces 4 moles of PCl₅.
According to Stoichiometry


= 
= 0.22580645161 mol
Now put the value in above equation


mol
Thus from the above conclusion we can say that 0.903 mol of PCl₅ can be produced from 28.0 g of P₄ (and excess Cl₂).
Learn more about the Stoichiometry here: brainly.com/question/25829169
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