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cluponka [151]
4 years ago
14

The density of silver is 10.5 g/cm3. A piece of silver that occupies a volume of 42.5 cm3 would have a mass of ________ g.

Chemistry
2 answers:
tia_tia [17]4 years ago
8 0
M=D*V
D=10.5 g/cm³
V=42.5 cm³
m= 10.5 g/cm³ * 42.5 cm³ ≈ 446 g
m≈446 g
MA_775_DIABLO [31]4 years ago
8 0

Answer:

446.25 grams.

Explanation:

To calculate mass, we must multiply the volume by the density.

m = v. d

If the volume is 42.5 cm3 and the density is 10.5 g / cm3, we can multiply the two values and find the mass. Thus we will have:

m = 42.5 x 10.5

m = 446.25 grams

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For each row in the table below, decide whether the pair of elements will form a molecular or ionic compound. If they will, then
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Answer:

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Explanation:

You look at the type of atom and their electronegativity difference.

If ΔEN <1.6, covalent; if ΔEN >1.6, ionic

Ar/Xe: Noble gases; no reaction

F/Cs: Non-metal + metal; ΔEN = |3.98 – 0.79| = 3.19; Ionic

N/Br: Two nonmetals; ΔEN = |3.04 - 2.98| = 0.

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3 years ago
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nikitadnepr [17]

Answer:

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Explanation:

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3 years ago
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GREYUIT [131]
According to provided equation it is clear that Zn metal is oxidized from Zn⁰ into Zn²⁺ which means that Zn metal dissolves and forming Zn²⁺ solution so the correct answer is:
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8 0
3 years ago
The energy of a photon needed to cause ejection of an electron from a photoemissive metal is expressed as the sum of the binding
slega [8]

Answer:

Binding\ energy=43.43\times 10^{-20}\ J

Explanation:

Using the expression for the photoelectric effect as:

E=h\nu_0+\frac {1}{2}\times m\times v^2

Also, E=\frac {h\times c}{\lambda}

\nu_0=\frac {c}{\lambda_0}

Applying the equation as:

\frac {h\times c}{\lambda}=\frac {hc}{\lambda_0}+\frac {1}{2}\times m\times v^2

Where,  

h is Plank's constant having value 6.626\times 10^{-34}\ Js

c is the speed of light having value 3\times 10^8\ m/s

\lambda is the wavelength of the light being bombarded

Given, \lambda=4.00\times 10^{-7}\ m

\frac {hc}{\lambda_0} is the binding energy or threshold energy

\frac {1}{2}\times m\times v^2 is the kinetic energy of the electron emitted.  = 6.26\times 10^{-20}\ J

Thus, applying values as:

\frac{h\times c}{\lambda}=Binding\ Energy+Kinetic\ Energy

\frac{6.626\times 10^{-34}\times 3\times 10^8}{4.00\times 10^{-7}}\ J=Binding\ Energy+6.26\times 10^{-20}\ J

\frac{19.878}{10^{19}\times \:4}\ J=Binding\ Energy+6.26\times 10^{-20}\ J

49.69\times 10^{-20}\ J=Binding\ Energy+6.26\times 10^{-20}\ J

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5 0
3 years ago
Whats the difference between Physics and Chemistry?
KonstantinChe [14]

Physics: Physics is more focused to finding the universal laws of general processes

Chemistry: Chemistry focuses more on details and specific phenomena, such as what is the boiling point of this substance and why.

4 0
3 years ago
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