The process to separate the various components of a liquid mixture is fractional distillation. True False

What is the hydrogen concentration of a solution with a pH of 2.1?

Black_prince [1.1K]

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.

5 0

3 years ago

Do you know the answer to this question?

Yakvenalex [24]

Yes i do know what this question is.

6 0

4 years ago

John dalton was the first person recorded as thinking that matter was ultimately composed of atoms. true or false

Alona [7]

<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>

3 0

3 years ago

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Consider the chemical equation for the combustion of sugar. _C6H12O6(s) + _O2(g) Right arrow. _CO2(g) + _H2O(l) Which sequence o

ioda

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:

And this is the balanced reaction

6 0

3 years ago

Read 2 more answers

How many moles of PCl5 can be produced from 28.0 g of P4 (and excess Cl2 )? Express your answer to three significant figures and

umka2103 [35]

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

$\frac{n_{P_4}}{1} = \frac{n_{PCl_5}}{4}$