Answer:
Only the valence shell are shown in the Lewis electron dot structures because, the chemical reactivity of an atom of an element is determined by the valence electrons of the atom and not by all the electrons of the atom including the inner electrons.
Explanation:
Lewis electron dot structures are structures that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule.
In the Lewis symbol for an atom, the chemical symbol of the element is written, and the valence electrons of the atom are represented as dots surrounding it. Only the electrons in the valence shell are shown using the Lewis electron dot structures.
Lewis structures for molecules show each atom and its position in the structure of the molecule using its chemical symbol. Dots or lines are drawn between atoms to show the electrons that are involved in the chemical bonding between the atoms in the molecule. Valence electrons in each atom that are not involved in bonding known as lone pairs, are represented as pairs of dots, and are placed next to each atom bearing the electron.
Electrons that are not in the valence level are not shown in the Lewis electron dot structures . This is because, the chemical reactivity of an atom of an element is determined by the valence electrons of the atom and not all the electrons of the atom including the inner electrons.
What happens to that atom of magnesium-24 if it GAINS a PROTON
Answer:
Adding or removing protons from the nucleus changes the charge of the nucleus and changes that atom's atomic number. So, adding or removing protons from the nucleus changes what element that atom is! For example, adding a proton to the nucleus of an atom of hydrogen creates an atom of helium
Explanation:
I WILL GIVE BRAINLIEST IF IT IS CORRECT
Match the term and definition Lesson 2.13 Question 6 options: wave height wavelength crest trough 1. top of a wave 2. lowest point of the wave 3. distance between crest and trough 4. Distance from crest to crest or the distance from trough to trough
Answer:
Question 6 options:
2
trough
1
crest
4
wavelength
3
wave height
Explanation:
BRAINLYEST PLEASE
Reproductions is the process by which organisms CANNOT make one or more organisms
True
False
14. Which type of bond is formed when an ammonia
molecule accepts a proton?
1) electrovalent
2) ionic
3) coordinate covalent
4) metallic
Answer: dative covalent bond
Explanation: one hydrogen ion is transferred from HCl to the lone pair on NH3 . This particular hydrogen only has its nucleus transferred—its electrons remain with chlorine. So, the bond between this particular hydrogen atom and the central nitrogen is a dative covalent bond.
If NaOH is added to 0.010 M Al3+, which will be the predominant species at equilibrium: Al(OH)3 or Al(OH)- 4 ? The pH of the solution is 14.00. [Kf for Al(OH) - 4 = 2.0 1033.]
Answer:
Al(OH)- 4,
Explanation:
NaOH added to 0.010 M Al3+
The predominant species at equilibrium will be = Al(OH)- 4, and this because sodium hydroxide ( NaOH ) is a base will readily form a stable complex ion with aluminum ion like ( Al( OH ) - 4 . also the higher the Kf value the more stable the complex ion becomes and the more soluble Al(OH)3 becomes
hence the predominant species at equilibrium is : Al(OH)- 4,
true or false, when something heats up, new energy is created, and when something cools down, energy is destroyed.
How many moles of a gas would occupy 22.4 Liters at 273 K and 1 atm?
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Answer:
The following relationship makes this possible: 1 mole of any gas at standard temperature and pressure (273 K and 1 atm) occupies a volume of 22.4 L.
Explanation:
1 mole of any gas would occupy 22.4L of gas at standard temperature and pressure (STP) i.e at 273K and 1 atm.
The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C (or 273 K) are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.
An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P V = n R T
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Buoyancy, density, ductility and solubility describe the ________ of matter
Answer:
the answer is physical properties
plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz help :) ..
Answer:
Explanation:the best guess I will go with is H but I might be wrong
Where could you find hydrocarbon chains?
Answer: Most Hydrocarbon chains are found in petroleum, coal, and natural gas. First of all, a hydrocarbon chain is a molecule that consist of entirely hydrogen and carbon.
Explanation: There are many types of hydrocarbon chains, which can be found in alkanes, alkynes, arenes, alkenes, and cycloalkanes. Natural rubber for instance is a hydrocarbon that primarily consists of alternating single and double bonded carbons.
I could swear all of these are nobles gases but here’s the question.
Which one of these is NOT a Noble Gas
A) Argon
B) Helium
C) Xenon
D) Neon
Topics on how humans use energy pls can somebody give me a few..
Answer: Humans use energy to carry out their daily activities, like moving around, working, running etc.
Explanation:
How many liters of nitrogen would be needed to react with 93.0 liters of hydrogen using the balance
equation below:
N2 + 3H2 → 2NH3
Answer:
7NH
Explanation:
What is the formula for silicon tetrabromide?
Answer:
SiBr4
Explanation:
Answer:
SiBr4
hope this helps!
Which list is in order from biggest to smallest
Answer:
we cant see the list
Explanation:
Which is an energy source for a coyote?
Answer:
The coyotes are both a plant and meat eaters whose common food is 90% of their diet, is small animals. Rabbits, hares, birds, snakes, fish, crustaceans, and insects are all on the menu.
hopefully this is right :))
Answer:
sun
Explanation:
enzyme, fat, sugar. Classify them into the group of organic compounds to which they belong to
Answer:
Enzyme: speed up chemical reactions
- protein
Fat: give us energy
- lipid
Sugar: give us energy
- carbohydrate
GIVE BRAINLEST PLEASE
Determine the number of molecules present in 1.53 mol of carbon monoxide
Answer:
hi
Explanation:
this is my first time on this app so what do i do
How would you describe the size of our sun compared to a red dwarf and a supergiant?
The sun is the same size as a red dwarf.
The sun is the same size as a supergiant.
The sun is smaller than the red dwarf and the supergiant.
O The sun is larger than a red dwarf but smaller than a supergiant.
Answer:
D is the answer
Explanation:
PLSSS HELP I AM STUCK ON THIS PROBLEM!!!
Answer:
i can't read it.. maybe upload a visible picture?
Cytokinesis happens differently for plant and animal cells. Both separate cytoplasm between two new daughter cells. However, which type of cell cytokinesis looks like a balloon being separated by a string being pulled tightly between them?
Question 4 options:
Plant Cell cytokinesis
Animal Cell Cytokinesis
Both
Neither
Answer:
Animal Cell Cytokinesis
Explanation:
Answer: Animal cell
Explanation:) It refers to the process of cell division, which takes place during mitosis, is known as cytokinesis.
The process of cytokinesis is different for animal cell and plant cell.
Where, in case of plant cell, a separation, known as cell plate is formed along the center of the parent cell, which is responsible for the separation of the cells.
Whereas, in case of animal cell, the plasma membrane contracts itself along the center, until the two daughter cells are separated from each other.
Hence, from the given information of the question,
The correct answer is animal cell.
what is the difference b/w combustion and synthesis reaction ?explain with example
Answer:
A synthesis reaction occurs when two or more reactants combine to form a single product in a double replacement reaction two compounds exchange elements. Combustion reaction occurs when a substance reacts quickly with oxygen combustion is commonly called burning. Example'- for synthesis reaction is iron+ oxygen —≥ water . Example:- for combustion reaction is often gaseous products.
may be this was ur answer I hope it might help u
How many grams of potassium chloride (KCl) can be produced from 180.6 g of chlorine (Cl2)?
Answer:
379.79 g of KCl
Explanation:
The balanced equation for the reaction is given below:
Cl₂ + 2KBr —> Br₂ + 2KCl
Next, we shall determine the mass of Cl₂ that reacted and the mass of KCl produced from the balanced equation. This can be obtained as follow:
Molar mass of Cl₂ = 70.90 g/mol
Mass of Cl₂ from the balanced equation = 1 × 70.90 = 70.90 g
Molar mass of KCl = 74.55 g/mol
Mass of KCl from the balanced equation = 2 × 74.55 = 149.1 g
SUMMARY:
From the balanced equation above,
70.90 g of Cl₂ reacted to produce 149.1 g of KCl.
Finally, we shall determine the mass of KCl produced by the reaction of 180.6 g of Cl₂. This can be obtained as follow:
From the balanced equation above,
70.90 g of Cl₂ reacted to produce 149.1 g of KCl.
Therefore, 180.6 g of Cl₂ will react to produce = (180.6 × 149.1)/70.90 = 379.79 g of KCl.
Thus, 379.79 g of KCl were obtained from the reaction.
What do weather scientists
do?
What are they called?
Write the correct formula for each compound named below. Show the from which it is formed.
Answer:
Explanation:
Sodium Chloride = Na⁺ + Cl⁻ = NaCl
Lithium bromide = Li⁺ + Br⁻ = LiBr
Magnesium fluoride = Mg ⁺² + F⁻ = Mg₂F.
Potassium Oxide = K⁺ + O⁻² = K₂O
Calcium sulphide = Ca⁺² + S⁻² = CaS
Aluminum Iodide = Al⁺³ + I⁻ = Al I₃
Barium bromide = Ba⁺² + Br⁻ = BaBr₂
Aluminum sulphide = Al⁺³ + S⁻ = Al₂S₃
Calcium Phosphide = Ca⁺² + P⁻³ = Ca₃P₂
Lithium Nitride = Li⁺ + N⁻³ = Li₃N
Magnesium Oxide = Mg⁺² + O⁻² = MgO
Aluminum Fluoride = Al⁺³ + F⁻ = AlF₃
Lithium Oxide = Li⁺ + O⁻² = Li₂O
Beryllium iodide = Be⁺² + I⁻ = BeI₂
what is one property that is different between water and oil? *
I am wondering how to find out the blood type of my grandson...my daughter is A+..father is in question...she is stressed to the max on the father of this baby boy.
Answer:
A person can identify their blood type at home using a rapid blood typing kit. Using the kit requires a person to pierce a finger with a needle. The kit comes with a card that contains chemicals known as reagents. These test for the presence of the antibodies and Rh factor.
Explanation:
Just like eye or hair color, our blood type is inherited from our parents. Each biological parent donates one of two ABO genes to their child. The A and B genes are dominant and the O gene is recessive. For example, if an O gene is paired with an A gene, the blood type will be A.
If 0.525 moles of O2 are produced, how many moles of KClO3 are decomposed?
Answer:
B. 0.35mol KClO3
Explanation:
The balanced equation in this question is given as follows:
2KClO3 → 2KCl + 3O2
Based on the chemical reaction;
2 moles of KClO3 decomposes into 3 moles of O2
If 0.525 moles of O2 are produced, then:
= 0.525 × 2/3
= 1.05/3
= 0.35mol of KClO3 is decomposed.
Which term describes living things? abiotic biotic
Answer:
biotic
Explanation:
How many bases of RNA represent an amino acid?
Answer:
three bases
Genetic experiments showed that an amino acid is in fact encoded by a group of three bases, or codon.
Explanation:
Hope this helps
In the given question, three bases of RNA represent an amino acid.
RNA (ribonucleic acid) is a molecule that plays an important role in protein synthesis. It carries genetic information from DNA to ribosomes, where it is used to direct the assembly of amino acids into proteins.
The genetic code is the set of rules by which the sequence of nucleotides in DNA or RNA is translated into the sequence of amino acids in a protein. The code is based on the sequence of three nucleotides, known as a codon, which specifies a particular amino acid.There are 64 possible codons, but only 20 amino acids that are used to build proteins. This means that some amino acids are specified by more than one codon. For example, the amino acid leucine can be specified by six different codons: UUA, UUG, CUU, CUC, CUA, and CUG.Therefore, three RNA bases represent an amino acid.
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