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1 year ago

15

Sixty-five percent of the mass of bone is a compound called hydroxyapatite. sixty-five percent of the mass of bone is a compound

called hydroxyapatite.
a. True
b. False

1 answer:

mafiozo [28]1 year ago

5 0

True. Its simple how i remeberd was the bone has 650,000 cells and the bone has 65% hydroxyapatite

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What element speed of sound is 323 m/s?

Pepsi [2]

Answer:

Speed of Sound

Explanation:

Speed of sound, fluid phases

m/s

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2 years ago

What is the name for molecular compound N4O8?

zmey [24]

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A food worker had safely cooled a large pot of soup to 70 F (21 C) with two hours. What temperature must the soup Reach in the f

padilas [110]

The temperature reached after four hours of cooling is 140 F (or) 42 C.

Explanation:

A food worker cooled a cup of soup for two hours,

step 1: The temperature reached in <u>two hours</u>= 70 F (or) 21 C

step 2: Then for <u>four hours</u>, <u>it is twice the value</u>

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2 years ago

By which process is a precipitate most easily separated from the liquid in which it is suspended

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A hypothetical AX type of ceramic material is known to have a density of 3.55 g/cm3 and a unit cell of cubic symmetry with a cel

postnew [5]

Explanation:

For AX type ceramic material, the number of formula per unit cells is as follows.

$\rho = \frac{n'(A_{c} + A_{A})}{V_{C}N_{A}}$

or, $n' = \frac{\rho a^{3}N_{A}}{(A_{c} + A_{A})}$

where, n' = no. of formula units per cell

$A_{c}$ = molecular weight of cation = 90.5 g/mol

$A_{a}$ = molecular weight of anion = 37.3 g/mol

$V_{c}$ = volume of cubic cell = 3.55 $g/cm^{3}$

a = edge length of unit cell = $3.9 \times 10^{-8} cm$

$N_{A}$ = Avogadro's number = $6.023 \times 10^{23}$

$\rho$ = density = 3.55 $g/cm^{3}$

Now, putting the given values into the above formula as follows.

$n' = \frac{\rho a^{3}N_{A}}{(A_{c} + A_{A})}$

= $\frac{3.55 g/cm^{3} \times (3.9 \times 10^{-8})^{3} \times 6.023 \times 10^{23}}{(90.5 + 37.3)}$

= 0.9

= 1 (approx)

Therefore, we can conclude that out of the given options crystal structure of cesium chloride is possible for this material.

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2 years ago