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wlad13 [49]
3 years ago
15

Which has truly differentiates into the skin and nervous system of the embryo?

Chemistry
1 answer:
damaskus [11]3 years ago
7 0

Answer:

Ectoderm

Explanation:

the ectoderm, develops into the integumentary system (the skin) and the nervous system. As the embryo develops, a portion of the ectoderm differentiates into a specialized region of neuroectoderm, which is the precursor for the tissue of the nervous system.

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A heterogeneous mixture can be made by mixing.........
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4 years ago
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The density of lithium is 0. 546 g/cm3. what volume is occupied by 3. 66 x 10 23 atoms of lithium?
s344n2d4d5 [400]

The volume occupied by 3.66 x 10^{23} atoms of lithium is 7.73 cm^3

<h3>What is Density?</h3>

The density of a substance is defined as the mass of the substance per unit volume. It is often denoted by the symbol ρ

The density of a substance is given by,

\rho = \frac{m}{V}

The mass of a substance is the measure of the amount of matter present in it. It is generally measured in grams (g) or kilograms (kg).

The volume of a substance is defined as the amount of 3D space occupied by it.

<h3>What is Mole Concept?</h3>

It is a concept which uses mole as a unit to measure the number of atoms, molecules or ions.

A mole is defined as the amount of substance which has the same number of elementary particles as there are atoms in 12 grams of \ce{^{12}C}

1 mole = Avogadro's number = 6.022 x 10^{23\\ atoms

<h3>Steps to find out the volume</h3>

Molar Mass of Lithium = 6.94 g/mol

1 mole of Lithium has 6.022 x 10^{23} atoms

3.66 x 10^{23} atoms of lithium has molar mass = \frac{6.94 g}{6.022\times10^{23} } \times 3.66 \times 10^{23}

m = 4.218 g

Substitute in density formula,

\rho = \frac{m}{V}

V = \frac{m}{\rho}

=\frac{4.218g}{0.546g/cm^3}

= 7.73 cm^3\\

Therefore, 3.66 x 10^{23} atoms of lithium occupies 7.73 cm^3\\ of volume.

Learn more about the mole concept:

brainly.com/question/1427235

#SPJ4

3 0
2 years ago
A chemical lab has isolated a metallic element from a compound. The metal
trapecia [35]

Answer:

C. 1

Explanation:

Group 1 metals are highly reactive (such as Sodium) and form 1 to 1 ratio of ions with halogens (such as chlorine, bromine etc).

This happens because group 1 element can donate 1 valence electron to fulfill their octet rule and halogens can receive 1 valence electron to fulfill their octet.

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3 years ago
What type of reaction is Au2S+H2---&gt; 2Au+H2S
sladkih [1.3K]

Answer:

single replacement reaction is type of reaction is Au2S+H2---> 2Au+H2S.

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3 years ago
Chemical reactions differ from nuclear reactions because ...
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By eliminating the other incorrect answers, the best answer is (b) <span>chemical reactions involve bonding and nuclear reactions involve releasing particles. Chemical reactions are mainly concerned with bonding between chemicals (though sometimes electrons are released but another atom/ion will absorb it), unlike nuclear reactions which always involves releasing subatomic particles.</span>
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