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3 years ago

Which processes occur when energy is removed from a substance

Chemistry

1 answer:

ratelena [41]3 years ago

8 0

Answer:

Note that melting and vaporization are endothermic processes in that they absorb or require energy, while freezing and condensation are exothermic process as they release energy.

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Can someone please help me with this

SOVA2 [1]

The answer is I would help but I’m slow

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3 years ago

Stars are _____ for most of their lives. A) stable B) unstable C) unpredictable

vladimir1956 [14]

Answer:

A. Stable

Explanation:

unless ur talking about the star in your PFP, then it's unstable xd

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3 years ago

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The different unit cell types have a different packing efficiency. The simple cubic has the least efficient packing and the face

kozerog [31]

Answer:

The answer is "52.8".

Explanation:

Please find the graph file in the attachment.

They have the atoms in 8 corners with one unit cell in an one so mesh (SCC).

Atoms throughout the corner contribute $\frac{1}{8}$ to both the cell unit

Atom number per SCC unit cell, $Z = (8 \times \frac{1}{8}) = 1$

Let 'r' become the atom's radius. $r = 3.43\times 10^{-8}\ \ cm$

We can see from the diagram that edge length $AB = a = 2r$

$Packing\ efficiency = \frac{(1 \ atom \ Volume \times Z)}{Volume \ of \ unit\ cell \times 100}\\\\$

$= \frac{\frac{4}{3}\times \pi \times r^3 \times 1}{a^3 \times 100}\\\\=\frac{\frac{4}{3}\times \pi \times r^3 \times 1}{(2r)^3 \times 100} \\\\=\frac{\frac{4}{3}\times \pi \times( 3.43\times 10^{-8}cm)^3 \times 1}{(2\times 3.43\times 10^{-8}cm)^3 \times 100}\\\\= 52.8 \%$

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3 years ago

. ______________ will slow down alcohol absorption. Sleeping well Food in the large intestine Being happy and relaxed Food in th

solong [7]

Answer:

Food in the stomach that is high in protein will dilute absorption of alcohol in your stomach :) therefore always drink with food in your stomach, just drinking alchol without food will have serious consequences on helath.

Explanation:

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3 years ago

The integumentary system is an organ system consisting of the skin, hair, nails, exocrine glands, and sensory nerves. What is th

-BARSIC- [3]

Answer is: epidermis is the most superficial layer of the skin.
Epidermis is consist of epithelial cells (the outermost protective shield of the body). Functions of epidermis are: barrier (physical, chemical,
immunologically), skin color and skin hydration.

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3 years ago

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