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Nutka1998 [239]
2 years ago
5

How many ATOMS of sulfur are present in 2.30 moles of sulfur trioxide?

Chemistry
1 answer:
zysi [14]2 years ago
8 0

Answer:

1.39 Atoms

Explanation:

When converting from moles to atoms, multiply the number of moles by Avogadro's number

Multiply 2.30 moles by Avogadro's number (6.022*10^23)

= 1.3851 Atoms

=1.39 Atoms (sigfig)

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What is the speed of light of an orange light with a wavelength of 600nm and a frequency of 5.00x1014?
vovangra [49]

Answer:

3 × 10^8 m/s

Explanation:

The wavelength, can be calculated by using the following formula;

λ = v/f

Where;

λ = wavelength (m)

v = velocity/speed of light (m/s)

f = frequency (Hz)

According to the provided information in this question, λ = 600nm i.e. 600 × 10^-9m, f = 5.00 x 10^14 Hz

Hence, using λ = v/f

v = λ × f

v = 600 × 10^-9 × 5.00 x 10^14

v = 6 × 10^-7 × 5.00 x 10^14

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2 years ago
What is the concentration of H3O+ ions in saliva if [OH-] = 4.22 x 10-10 M? Provide the pH and the classification of this sample
OLEGan [10]

pH=4.625

The classification of this sample of saliva : acid

<h3>Further explanation</h3>

The water equilibrium constant (Kw) is the product of concentration

the ions:

Kw = [H₃O⁺] [OH⁻]

Kw value at 25° C = 10⁻¹⁴

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then the concentration of H₃O⁺:

\tt 10^{-14}=4.22\times 10^{-10}\times [H_3O^+]\\\\(H_3O^+]=\dfrac{10^{-14}}{4.22\times 10^{-10}}=2.37\times 10^{-5}

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What is smaller than atoms and bigger than molecule
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Atoms are smaller than molecules, and they are also the smallest building blocks of matter. Atoms make up molecules when two or more atoms bond.
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1.5M

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Molarity = moles/volume

0.60 mol / 0.40 L = 1.5 M

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