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grandymaker [24]
2 years ago
7

Question 1 of 10

Chemistry
2 answers:
Zepler [3.9K]2 years ago
8 0
A. The pH indicates how acidic or basic a
solution is.
aleksandrvk [35]2 years ago
4 0

________________________________________

What does the pH of a solution represent?

A. The pH indicates how acidic or basic a solution is.

B. The pH represents the partial pressure of hydrogen gas.

C. The pH is an indicator of the salt content of a solution.

D. The pH tells how quickly a reaction reaches equilibrium.

________________________________________

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How many atoms of gold (Au) are equal to 212g of gold?
Lostsunrise [7]

Given :

Mass of gold ( Au ) is 212 gram.

To Find :

Atoms of gold present in 212 gram of gold.

Solution :

Molecular mass of gold is 197 gram.

So, number of moles of gold in 212 gram is :

n = \dfrac{212}{197} \ moles\\\\n = 1.076 \ moles

Now, we know 1 mole of any element contains 6.022 \times 10^{23} atoms.

So, number of atoms present in 1.076 moles are :

N = 1.076 \times 6.022\times 10^{23}\\\\N = 6.48 \times 10^{23}

Hence, this is the required solution.

8 0
3 years ago
1<br> The process of a solid turning into a liquid is called
katrin [286]

Answer:

Melting

Explanation:

Once heat is added it will turn to a liquid

7 0
3 years ago
Read 2 more answers
Which of the following is a mixture steel water oxygen or gold
MAXImum [283]
Steel is an alloy and consists of more than one element (mainly iron and carbon), therefore steel is a mixture.
7 0
3 years ago
An analytical chemist is titrating 118.3 mL of a 0.3500 M solution of butanoic acid (HC3H7CO2) with a 0.400 M solution of KOH. T
TEA [102]

Answer:

pH = 12.33

Explanation:

Lets call HA = butanoic acid and A⁻ butanoic acid and its conjugate base butanoate respectively.

The titration reaction is

HA + KOH ---------------------------- A⁻ + H₂O + K⁺

number of moles of HA :   118.3 ml/1000ml/L x 0.3500 mol/L = 0.041 mol HA

number of  moles of OH  : 115.4 mL/1000ml/L x 0.400 mol/L  = 0.046 mol A⁻

therefore the weak acid will be completely consumed and what we have is  the unreacted strong base KOH which will drive the pH of the solution since the contribution of the conjugate base is negligible.

n unreacted KOH = 0.046 - 0.041 = 0.005 mol KOH

pOH = - log (KOH)

M KOH = 0.005 mol / (0.118.3 +0.1154)L = 0.0021 M

pOH = - log (0.0021) = 1.66

pH = 14 - 1.96 = 12.33

Note: It is a mistake to ask for the pH of the <u>acid solutio</u>n since as the above calculation shows we have a basic solution the moment all the acid has been consumed.

4 0
2 years ago
The isomers butane and methyl propane have
madreJ [45]

Explanation:

“The isomers butane and methyl propane have the same molecular formula and different properties”, this is because structural isomers usually have different properties to their parent.

3 0
3 years ago
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