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stepan [7]
2 years ago
6

A sample of silver metal contains 1.91 X 1021 atoms. How many moles of silver is this?

Chemistry
1 answer:
alexandr402 [8]2 years ago
6 0

Answer:

1.91×1021/6.023×10^23

Explanation:

need thanks and make me brainiest if it helps you

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Balance the chemical equation hcl+ Naoh
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Answer:

NaCL + H2O

Explanation:

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the elements iron (Fe), copper (Cu), and mercury (Hg) are classified as metals. which physical property of metals do they all sh
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They are heavy metals.

Explanation:

Heavy metals are generally defined as metals with relatively high densities, atomic weights, or atomic numbers.

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D. Air molecules touch the warm ground, heating them up
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(Hurry ASAP!!!) There are 1.5 moles of methane (CH4) in a tank. It has a pressure of 4.4 atm at 173°C. Find the volume occupied
slamgirl [31]

Answer:

hope this help !

Explanation:

Use the given functions to set up and simplify 173 ° C .

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8 0
2 years ago
X-rays had a frequency of about 3x10^18 determine it's wavelength (in nm) and energy per photon
Serggg [28]

Answer:

E = 19.89×10⁻¹⁶ J

λ = 1×10⁻¹ nm

Explanation:

Given data:

Frequency of xray = 3×10¹⁸ Hz

Wavelength of xray = ?

Energy of xray = ?

Solution:

speed of wave = wavelength × frequency

speed = 3×10⁸ m/s

3×10⁸ m/s  = λ ×3×10¹⁸ s⁻¹

λ = 3×10⁸ m/s  / 3×10¹⁸ s⁻¹

λ = 1×10⁻¹⁰m

m to nm:

λ = 1×10⁻¹⁰m×10⁹

λ = 1×10⁻¹ nm

Energy of x-ray:

E = h.f

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by putting values,

E = 6.63×10⁻³⁴ Js ×3×10¹⁸ s⁻ ¹

E = 19.89×10⁻¹⁶ J

7 0
2 years ago
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