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3 years ago

What two categories are used in classifying particulate matter?

1 answer:

3 0

<span>The two categories for classifying particulate matter are through analysis of the intensive and extensive properties. Intensive properties are independent properties that can be measured independent of the amount of matter while extensive properties are measured dependent on the amount.</span>

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Which of the following would a chemist be most likely to study?

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B. because the other options are different sciences (biology and entomology)

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3 years ago

Calcium has a cubic closest packed structure as a solid. Assuming that calcium has an atomic radius of 197 pm, calculate the den

NISA [10]

Answer:

$\rho=1.54\ g/cm^3$

Explanation:

The expression for density is:

$\rho=\frac {Z\times M}{N_a\times {{(Edge\ length)}^3}}$

$N_a=6.023\times 10^{23}\ {mol}^{-1}$

M is molar mass of Calcium = 40.078 g/mol

For cubic closest packed structure , Z= 4

$\rho$ is the density

Radius = 197 pm = $1.97\times 10^{-8}\ cm$

Also, for fcc, $Edge\ length=2\sqrt{2}\times radius=2\sqrt{2}\times 1.97\times 10^{-8}\ cm=5.572\times 10^{-8}\ cm$

Thus,

$\rho=\frac{4\times \:40.078}{6.023\times \:10^{23}\times \left(5.572\times 10^{-8}\right)^3}\ g/cm^3$

$\rho=\frac{160.312}{10^{23}\times \:6.023\left(10^{-8}\times \:5.572\right)^3}\ g/cm^3$

$\rho=\frac{160.312}{10^{23}\times \:1.04195E-21}\ g/cm^3$

$\rho=\frac{160.312}{104.19483}\ g/cm^3$

$\rho=1.54\ g/cm^3$

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3 years ago

What is the product of the unbalanced combustion reaction below?

timurjin [86]

Answer: A

Explanation:

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Certain gases in the atmosphere, like carbon dioxide, nitrous oxide, and methane, absorb heat and prevent it from escaping into

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The correct answer is "greenhouse gases." Certain gases in the atmosphere, like carbon dioxide, nitrous oxide, and methane, absorb heat and prevent it from escaping into space. These gases are called greenhouse gases.

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Which statement describes what occurs as two atoms of bromine combine to become a molecule of bromine?

Liono4ka [1.6K]

Br + Br -> Br2 (covalent bond)

<span>forming of bonds releases energy, since the Br's are at a lower energy state as Br2

Answer is #3</span>

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4 years ago

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