Answer:
The possible valances can be determined by electron configuration and electron negativity
Good Luck even though this was asked 2 weeks ago
Explanation:
All atoms strive for stability. The optima electron configuration is the electron configuration of the VIII A family or inert gases.
Look at the electron configuration of the nonmetal and how many more electrons the nonmetal needs to achieve the stable electron configuration of the inert gases. Non metals tend to be negative in nature and gain electrons. ( They are oxidizing agents)
For example Florine atomic number 9 needs one more electron to reach a valance number of 8 electrons to equal Neon atomic number 10. Hence Flowrine has a valance of -1
Oxygen atomic number 8 needs two more electrons to reach a valance number of 8 electrons to equal Neon atomic number 10. Hence Oxygen has a valance charge of -2.
Non metals with a low electron negativity will lose electrons when reacting with another non metal that has a higher electron negativity. When the non metal forms an ion it is necessary to look at the electron structure to determine how many electrons the element can lose to gain stability.
For example Chlorine which is normally -1 like Florine when it combines with oxygen can be +1, +3, + 5 or +7. It can lose its one unpaired electron, or combinations of the unpaired electron and sets of the three pairs of electrons.
According to the passage, as a result of a mutation, an organism
A
will most likely die.
B
will receive chemical radiation.
С
may evolve for better survival.
D
may be duplicated.
Answer: C
Explanation:
According to the passage, as a result of a mutation, an organism may evolve for better survival. The correct option is C.
What is mutation?The mutation is a condition in which genes and DNA sequence changes. Mutation occurs due to mutagens. These mutagens can be biological or chemical. Cells come in contact with these mutagens and undergo mutation.
The mutation causes diseases, due to changes in DNA sequence and genes. People die due to mutation. Sometimes mutation causes the birth of new genes and traits in an organism.
So, in the given condition, the organism will evolve new traits that can be good or necessary for the better survival of the organism. The passage is talking about radiation.
Therefore, the correct option is С, which may evolve for better survival.
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The question is incomplete. Your most probably complete question is given below:
When a cell divides to grow into two new cells, the double helix splits into two single strands of chromosomes, each of which can then replicate a mirror image of itself. This process, called mitosis, happens every time a cell divides, except for sex cells preparing for sexual reproduction. The result is two new cells, each with a double helix of DNA strands identical to that of the original cell.
Though rare, sometimes an error occurs in this process, resulting in a mutation. Radiation or the appearance of other chemicals can increase their frequency. Sometimes an extra base is inserted, substituted, deleted, or damaged. Usually, these mistakes repair themselves, but sometimes they remain and, as a result, can create a change in the coding for a specific trait. If the new trait helps the organism survive, it may be duplicated and passed on to offspring, which, in time, may lead to an evolution in the organism.
List all the ways you can change oceanic crust into continental crust using the sliders.
IS
Answer:
By moving the thickness slide just a little bit to the right and just before the oceanic crust turns to continental crust, I can use either the temperature slider or the composition slider by moving either of them to the right until the oceanic crust turns to be continental crust.
Explanation:
By moving the thickness slider slightly to the right and just before the oceanic crust transitions to continental crust, one can use either the temperature slider or the composition slider to the right until the oceanic crust transitions to continental crust.
What is continental crust?Continental crust, the outermost layer of Earth's lithosphere that forms the planet's continents and continental shelves and is formed near plate boundaries between continental and oceanic tectonic plates.
Almost all of Earth's land surface is made up of continental crust.
The thinner oceanic crust is typically less than four miles thick, whereas the thicker continental crust can be up to 25 miles thick.
Individuals can choose to use the temperature slider or the composition slider to the right through till oceanic crust transitions to continental crust by moving the thickness slider bit to the right and just prior to the oceanic crust transitions to continental crust.
Thus, these are the three ways one can change oceanic crust into continental crust using the sliders.
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hi guys what is mean
Answer:
mean is something that rude
mean is when ur dont undetstand something and u say what do u (mean)
Explanation:
lol why dont u know this answer
Answer:mean is Vete a la mierda con tu pellizco mamá
Explanation:its something nice
help me with this science question for brainiest:)
Answer:
solid liquid and gas
Explanation:
Answer: Forms: Liquid water, solid water (ice) and gaseous water (water vapor)
Explanation:
Obviously liquid water comes from the sink, ice can be found in the freezer, and water vapor comes from boiling water, it is always in the air around us.
Liquid water is used for hydration or for food preparation. Ice is used to cool things down or in drinks, and water vapor isn't really used by humans. Rather, it serves as a natural greenhouse gas.
What are the different stages in the cell cycle? (hint: you should have six)
prophase, prometaphase, metaphase, anaphase, telophase and cytokinesis
Explanation:
covalent bonds always share electrons equally
A: True
B: False
I hope this helped! +*♡
How much of earth's freshwater is in the solid state or under ground?
That would be B: 33%, but please correct me if I'm wrong ^^
Answer:
that would be b:33 i believe pls dont blame met
Houses and other buildings use circuits that are wired in
____________ ?
Answer:
parallel circuits
Explanation:
6 CO2 + 6 H2O → C6H12O6 + __ O2
Answer:
co2 is the answer
Explanation:
I hope it helps you
A delivery truck hits a parked car from behind. The mass of the car is 2550 kg. What force is exerted on the car if (a) the car is rigid and accelerates to 4.5 m/s in 0.20 s? (b) the car has crumple zones and accelerates to 4.5 m/s in 0.30 s?
Helpp meee........TT
Explanation:
Given parameters:
Mass of the car = 2550kg
Initial velocity = 0m/s
Solution:
First problem is to find the force exerted on the car;
Velocity = 4.5m/s
Time = 0.2s
Acceleration = [tex]\frac{final velocity - initial velocity }{time}[/tex] = [tex]\frac{4.5 - 0}{0.2}[/tex] = 22.5m/s²
Force = mass x acceleration = 2550 x 22.5 = 57375N
B. Force on the car with crumple zones
Acceleration = [tex]\frac{final velocity - initial velocity }{time}[/tex] = [tex]\frac{4.5 - 0}{0.3}[/tex] = 15m/s²
Force = 2550 x 15 = 38250N
a. The force when the car is rigid and accelerated is 57375N.
b. The force where the car should have crumple zones should be 38250N
Calculation of the force:
Since Mass of the car = 2550kg
Initial velocity = 0m/s
Here,
Velocity = 4.5m/s
Time = 0.2s
a.
Here force = mass * acceleration
= 2550 * (4.5 - 0/0.2)
= 2550 * 22.5
= 57375 N
b.
Here force is
= mass * acceleration
= 2550 * (4.5 - 0/0.3)
= 2550 * 15
= 38250 N
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A well-mixed mixture containing a solvent and dissolved a solute.
Answer:
Solution
Explanation:
A solution is a well-mixed mixture containing a solvent and dissolved solute.
It is termed a homogenous mixture.
Solutions are homogeneous mixtures of solutes and solvents. In a solution, the solute particles are distributed uniformly in the solvent. The solute is the substance that is dissolved to make the solution
It is usually present in smaller amount than the solvent. The solvent is the dispersing substance that allows the solute to go into solution.
The solute could be a solid or liquid or gas but usually a liquid. A solution in which the solvent is water is an aqueous solution.
The uncertainty in the measurement 1500 m is
Answer:
Its 1500 meters, which is equal to 0.9320568 miles. Hope this helps!
Explanation:
How do you compare the total mass of reactants to the total mass of the products when modeling an equation?
(8th Grade Science)
Answer:
Balance the stoichiometric amounts of both the reactants and the products.
Please Help! Thank You
28.5 L = 1.00647 ft³
Further explanationGiven
28.5 Liters
Required
Convert to cubic feet
Solution
Dimensional analysis (unit analysis) is used to convert one unit to another using a conversion factor
Liters and A cubic foot (ft³) is a unit of volume
cubic feet (ft³) are commonly used in the US
Conversion factor :
1 Liter = 0,0353147 ft³
So for 28.5 Liters :
[tex]\tt 28.5~L\times \dfrac{0.0353147~ft^3}{1~L}=1.00647~ft^3[/tex]
what is this number called?
Answer:
Atomic mass i believe..
what are table sugar and baking soda examples of
Answer:
Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances. Tin, sulfur, and diamond are examples of pure substances that are chemical elements. All elements are pure substances.
Explanation:
PLEASE MARK ME AS BRAINLIEST
What is the answer to Isotope 3?
The speed of light is .99*10^ 8 m/s . Change this to feet-per-minute (ft/min) 1 foot = 0.3048 m, 60.000 sec (exact)= 1 min Unrounded Answer = 5.88583 * 10 ^ 10 ft /min
Answer:
5.88583×10¹⁰ ft/min
Explanation:
From the question given above, the following data were obtained:
Speed of light (in m/s) = 2.99×10⁸ m/s
Speed of light (in ft/min) =.?
Next, we shall convert 2.99×10⁸ m/s to ft/s. This can be obtained as follow:
0.3048 m/s = 1 ft/s
Therefore,
2.99×10⁸ m/s = 2.99×10⁸ m/s × 1 ft/s / 0.3048 m/s
2.99×10⁸ m/s = 980971129 ft/s
Finally, we shall convert 980971129 ft/s to ft/min. This can be obtained as follow:
1 ft/s = 60 ft/min
Therefore,
980971129 ft/s = 980971129 ft/s × 60 ft/min / 1 ft/s
980971129 ft/s = 5.88583×10¹⁰ ft/min
Thus, 2.99×10⁸ m/s is equivalent to 5.88583×10¹⁰ ft/min
Explain why no experiment is a failure.
Answer:
No experiment is a failure, because anytime you mess up, you learn from your mistakes and when you try the experiment again you can fix what you messed up on last time.
whose photographs were instrumental in the discovery of DNA?
Answer:
Watson and Crick were also aided in their discovery by Maurice Wilkins (1916-2004) and Rosalind Franklin (1920-1958). Franklin had taken X-ray photographs of DNA that her colleague, Wilkins, showed to Watson
Explanation:
Answer:
Rosalind Franklin. She discovered DNA as a double helix form. But men got jealous of her and stole her work just because she is a woman. How cruel! That's why there is something called feminism in this world.
Explanation:
Hope it helped!
What are the 4 main types of tissues in the human body?
Answer: nervous tissue connective tissue epithlial tissue muscle tissue
Explanation:
The effect on temperature on The rate of the reaction between marble chips hydraulic acid can be investigated by measuring The production of carbon dioxide
is it a b c or d
Answer:
D. Thermometer
Explanation:
The equipment used to measure the temperature of any reaction is the thermometer.
A thermometer is any device that has been specifically calibrated to measure the temperature values of reaction.
Temperature is the degree of hotness or coldness of a body. Cold bodies have very low temperature. Hot bodies have high temperatures. There are different types of thermometers in use for various purposes.Blood absorbs oxygen and releases carbon dioxide in the lungs' ______.
A. picks up nutrients, water, and waste materials
B. pulmonary circulation
C. the lungs, where it picks up oxygen again
D. capillaries
E. 5
F. systemic circulation
Answer:
B. pulmonary circulation
Explanation:
just a guess
When 29 grams of sodium metal (Na) react with 49 grams of chlorine gas (C1), solid
sodium chloride (NaCl) is created in synthesis reaction. How much excess sodium OR
chlorine is left over?
Answer:
Explanation:
Na + Cl = NaCl
23 g 35.5 g
23 g sodium reacts with 35.5 g of chlorine
29 g of sodium reacts with 35.5 x 29 / 23 g of chlorine
= 44.76 g
So 44.76 g of chlorine reacts and 49 - 44.76 = 4.24 g of chlorine is left over .
All the sodium is used up in the reaction .
A sample of gold has a volume of 2 cm3 and a mass of 38.6 grams. What is the density of this sample? HINT: Use the formula D=m/v
The diagram above describes the movement of molecules in a substance used to make fuel. What change did the fuel scientist observe in the substance? (The diagram only shows some gray colored pots and underneath one it says "before: molecules move around each other" and the other one says "after molecules move away from each other") I needd helpppp asappp
A. Before the process, the substance was a solid. After the process, it was a liquid.
B. Before the process, the substance was a gas. After the process, it was a liquid.
C. Before the process, the substance was a liquid. After the process, it was a solid.
D. Before the process, the substance was a liquid. After the process, it was a gas.
Answer:
D "Before the process, the substance was a liquid. After the process, it was a gas.
Explanation:
hope this helps.
According to the forces of attraction , before the process substance was liquid and after the process it was a gas as gas molecules are farther away than those in liquid.
What are forces of attraction?Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
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An old lady walks her dog for 12 minutes. How many seconds did she walk the dog for?
60 s = 1 minute
a 72 seconds
b 1200 seconds
c 720 seconds
d 60 seconds
Answer:
The answer is 720 seconds :)
Explanation:
Someone please help! this is the last question
I only need help with B.
1. mol ratio of Al(NO₃)₃ : Na₂CO₃ = 2 : 3
2. Na₂CO₃ as a limiting reactant
Further explanationGiven
Reaction
2 Al(NO₃)₃ + 3 Na₂CO₃ → Al₂(CO₃)₃ + 6 NaNO₃
Required
mol ratio
Limiting reactant
Solution
The reaction coefficient in the chemical equation shows the mole ratio of the components of the compound involved in the reaction (reactants and products)
1. From the equation mol ratio of Al(NO₃)₃ : Na₂CO₃ = 2 : 3
2. mol : coefficient of Al(NO₃)₃ : Na₂CO₃ = 2 mole/2 : 2 mole/3 = 1 : 0.67
Na₂CO₃ as a limiting reactant (smaller)
Balance each of these equations.
A. NO + O2 NO2
B. Co + O2 Co2O3
C. Al + Cl2 Al2Cl6
D. C2H6 + O2 CO2 + H2O
E. TiCl4 + Na Ti + NaCl
Answer:
A. 2NO + O2 -> 2NO2
B. 4Co + 3O2 -> 2Co2O3
C. 2Al + 3Cl2 -> Al2Cl6
D. 2C2H6 + 7O2 -> 4CO2 + 6H2O
E. TiCl4 + 4Na -> Ti + 4NaCl
In a given column of the periodic table the elements have _____.
a. similar properties
b. sequential atomic numbers
c. similar atomic masses
d. the same densities
Answer:
a. similar properties
Explanation:
In a given column of the periodic table, the elements have similar properties.
A column on the periodic table is known as a group or family. The group is a vertical arrangement of elements on the periodic table.
Elements in the same group have the same number of valence electrons after their group number.
For example, all the elements in group 1 have one valence electron. Those in group 2 have 2 valence electrons.
The valence electrons of an atom determines its chemical properties. So, all elements in the same group have the same chemical properties.
Answer: similar properties
Explanation:
