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3 years ago

What does conserve mean?

Chemistry

1 answer:

Wewaii [24]3 years ago

8 0

To protect(something, especially an environmentally or culturally important place or thing) from harm or destruction.

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Phosphorus crystallizes in several different forms, one of which is a simple cube with an edge length of 238 pm. What is the den

algol13

<u>Answer:</u> The density of phosphorus is $3.81g/cm^3$

<u>Explanation:</u>

To calculate the density of phosphorus, we use the equation:

$\rho=\frac{Z\times M}{N_{A}\times a^{3}}$

where,

$\rho$ = density

Z = number of atom in unit cell = 1 (CCP)

M = atomic mass of phosphorus = 31 g/mol

$N_{A}$ = Avogadro's number = $6.022\times 10^{23}$

a = edge length of unit cell = $238pm=238\times 10^{-10}cm$ (Conversion factor: $1cm=10^{10}pm$ )

Putting values in above equation, we get:

$\rho=\frac{1\times 31}{6.022\times 10^{23}\times (238\times 10^{-10})^3}\\\\\rho=3.81g/cm^3$

Hence, the density of phosphorus is $3.81g/cm^3$

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Whats the number of moles of O2(g) needed to completely react with 8 moles of CO(g).

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A mole of CO2 = 2 moles of O2
8 CO moles x 2 =

16 moles

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