Answer:
As the atomic number of elements increases, the melting point increases because there are more electrons around the nucleus, which creates a stronger negatively-charged force. With stronger forces, the melting point rises. 3. Non-metals usually have low melting points.
Explanation:
The melting point rises as the atomic number of elements increases because there are more electrons surrounding the nucleus, creating a stronger negatively charged force. The melting point rises as the forces become stronger.
What is nucleus?The nucleus is made up of protons, which are positively charged, and neutrons, which are electrically neutral. Quarks are particles that make up protons and neutrons. The nucleus (plural, nuclei) is a positively charged region in the atom's center. It is made up of two types of subatomic particles that are tightly packed together. Protons, which have a positive electric charge, and neutrons, which have a neutral electric charge, are the particles. The nucleus is the most important component of the cell (plural: nuclei). It is derived from a Latin word that means "nut kernel." Definition of Nucleus: A nucleus is a double-membraned eukaryotic cell organelle that contains genetic material.To learn more about nucleus, refer to:
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The volume of a single molybdenum atom is 1.05*10^-23 cm^3. What is the volume of a molybdenum atom in micro liters
Answer:
1.05 × 10^-20 microlitres
Explanation:
The computation of the volume of a molybdenum atom in micro liters is shown below:
As we know that
1 litre = 1000cm^3
1 microlitre= 10^-6 litre
Therefore
1 cm^3 = 10^3 microlitres.
hence,
1.05 × 10^-23 cm^3 = 1.05 × 10^-20 microlitres
Hence, the volume of a molybdenum atom in micro liters is 1.05 × 10^-20 microlitres
The same is to be considered
the acid present in our stomach is ________.
A.nitric acid
B.sulphuric acid
C.hydrochloric acid
D.carbonic acid
Answer:
c, hydrochloric acid
Explanation:
How many atoms are there in 46.4 g of sulfur?
Answer:
371.2
Explanation:
.
Can you explain why you feel warm when you are standing near a campfire?
Answer:
You feel warm when you stand near a campfire because the flames of the fire warm your body. The heated waves are hit towards you and your body feels warm.
Hope this helped :)
Explanation:
what is true about mass
Answer:
Mass is both a property of a physical body and a measure of its resistance to acceleration (a change in its state of motion) when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies.
Explanation:
I have leaned it
The growth of a certain plot was measured over a period of more than a month. How many centimeters did the plant grow between day 10 and day 30. 0.5 cm 1.0 cm 1.5 cm 2 cm
Answer:
2cm would be the answer I think
Which type of bonds do polar covalent bonds break down in chemical reactions?
A. polar covalent and ionic bonds
B. nonpolar covalent bonds and polar covalent bonds
C. ionic bonds and nonpolar bonds
D. none of the above
Answer:
(C) im pretty sure is the answer
Explanation:
The type of bonds does polar covalent bonds break down in chemical reactions is ionic bonds and nonpolar bonds. Therefore, option C is correct.
What is an ionic bond ?Ionic bond is also known as electrovalent bond. The term ionic bond is defined as a chemical bond formed when one atom gives up one or more electrons to another atom.
It is also defined as when positively charged particle produce a bond with negatively charged particle. The chemical molecule sodium chloride is an example of an ionic bond.
In ionic bonding, the electrostatic attraction between oppositely charged ions, or between two atoms with sharply different electronegativities. The type of bonds does polar covalent bonds break down in chemical reactions is ionic bonds and nonpolar bonds.
Thus, option C is correct.
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Science...............
A student ran the following reaction in the laboratory at 751 K: N2(g) + 3H2(g) 2NH3(g) When she introduced 3.47×10-2 moles of N2(g) and 6.38×10-2 moles of H2(g) into a 1.00 liter container, she found the equilibrium concentration of H2(g) to be 6.25×10-2 M. Calculate the equilibrium constant, Kc, she obtained for this reaction.
Answer:
Kc = 4.86×10⁻⁶
Explanation:
We begin from the equation:
N₂ + 2H₂ ⇄ 2NH₃
We start from 3.47×10⁻² moles of N₂(g) and 6.38×10⁻² moles of H₂(g), so when we reach the equilibrium, we get 6.25×10⁻² moles of H₂.
This data means, that in the reaction we made react:
6.38×10⁻² - x = 6.25×10⁻²
x = 1.3×10⁻³ moles of H₂
As stoichiometry is 1:3, we will know that the moles of N₂ that have been reacted were:
1.3×10⁻³ moles / 3 = 4.33×10⁻⁴ moles of N₂
So, in the equilibrium we would have:
3.47×10⁻² moles of N₂ - 4.33×10⁻⁴ moles of N₂ = 0.0343 moles of N₂
How many ammonia, would we have in the equilibrium?
4.33×10⁻⁴ mol . 2 = 8.66×10⁻⁴ moles (from stoichiometry with N₂, 1:2)
(1.3×10⁻³ mol . 2) / 3 = 8.66×10⁻⁴ moles (from stoichiometry with H₂, 2:3)
Let's make the expression for Kc
Kc = [NH₃]³ / [N₂] . [H₂]²
(8.66×10⁻⁴ )³ / (0.0343 . (6.25×10⁻²)² = 4.86×10⁻⁶
Lions and cheetahs live in the same area and both eat they same type of prey. Which type of competition occurs between a lion and a cheetah?
intraspecific
predator-prey
interspecific
mutualism
