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Vlada [557]
2 years ago
11

Pure silver has a brilliant white metallic luster. How many moles of silver, Ag, are in 7.54 × 1023 atoms of silver?

Chemistry
1 answer:
AleksAgata [21]2 years ago
7 0

The number of moles of silver, Ag, that are in 7.54 × 10²³ atoms of silver is 1.25 moles

From the question,

We are to determine the number of moles of silver, Ag, that are present in 7.54 × 10²³ atoms of silver

From the formula

Number\ of\ moles  =\frac{Number\ of\ atoms}{Avogadro's\ constant}

Avogadro's  constant = 6.022 × 10²³  atoms mol⁻¹

and

From the given information

Number of silver atoms = 7.54 × 10²³ atoms

Putting the parameters into the formula, we get

Number of moles of silver present = \frac{7.54\times 10^{23} }{6.022\times 10^{23}}

Number of moles of silver present = 1.2520757 moles

Number of moles of silver present ≅ 1.25 moles

Hence, the number of moles of silver, Ag, that are in 7.54 × 10²³ atoms of silver is 1.25 moles

Learn more on calculating number of moles here: brainly.com/question/15839520

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3 years ago
If 11.00 mL of a standard 0.2831 M NaOH solution is required to neutralize 26.86 mL of H2SO4, what is the molarity of the acid s
MrRa [10]

Answer:

0.1159 M

Explanation:

Using the formula below:

CaVa = CbVb

Where;

Ca = concentration/molarity of acid (M)

Cb = concentration/molarity of base (M)

Va = Volume of acid (mL)

Vb = volume of base (mL)

According to this question, the following information were given:

Ca = ?

Cb = 0.2831 M

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Vb = 11.00 mL

Using CaVa = CbVb

Ca × 26.86 = 0.2831 × 11

26.86Ca = 3.1141

Ca = 3.1141 ÷ 26.86

Ca = 0.1159

The molarity of the acid (H2SO4) solution is 0.1159 M

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3 years ago
What is the value that corresponds to the number of atom
chubhunter [2.5K]

Answer:

6.022 x 10²³

Explanation:

Data Given:

mass of carbon = 12.01 g

individual particles = 6.02 x 10²³

number of atoms = ?

Solution:

Formula used to find the number of atoms

                no. of moles = number of atoms / 6.022 x 10²³ . . . . . (1)

So, first we have to find number of moles

Formula to find no. of moles

               no. of moles = mass in grams/ molar mass. . . . . (2)

molar mass of Carbon = 12.01 g/mol

Put values in eq.2

            no. of moles = 12.01 g / 12.01 g/mol

            no. of moles = 1 mol

Now put the values in eq. 1

                no. of moles = number of atoms / 6.022 x 10²³ . . . . . (1)

                    1 mol = number of atoms / 6.022 x 10²³

Rearrange the above equation

               number of atoms = 1 mol x 6.022 x 10²³

                number of atoms = 6.022 x 10²³

So it is 6.022 x 10²³ atoms in 12.01 grams of carbon. This 6.022 x 10²³ also Known as Avogadro's number that is one mole of any substance consists this number of atoms.

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