Drag the names to the order planets based their distance from the sun, beginning with the planet closet to the sun.
Answer: In this order
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
Explanation:
Answer:
Mars.....................
Li+1 is an ion of Lithium with an overall +1 charge. It has 3 protons. How many electrons does it have?
Answer:
2 electrons.
Explanation:
Soil forms layers when mixed with water. sand is found above what ?
Answer:
Explanation:
Clay:)type the max number of electrons that can be present in each shell or sub below
n = 5 shell __
n = 2 shell __
n = 2 l = 0 sub: __
n = 2 / 1 sub: __
3d sub: __
2s sub: __
5f sub: __
Explanation:
The maximum no. of electrons in a shell is given by. 2n^2 .
So for
n= 5 , 2× 5× 5 = 50
n=2 , 2×2×2 = 8
For a sub shell the maximum no. of electrons possible is given by 2(2l + 1)
So for n= l= 0
2 [(2×0) +1] = 2
for n=2 l=1
2 [(2×1) + 1] = 6
3d
d sub shell has l= 2 quantum number
Therefore 2[ (2×2) + 1] = 10
2s
s sub shell has l=0 quantum number
2 [(2×0) +1] = 2
5f
f sub energy level has l=3 quantum number
So 2[ (2×3) +1 ] = 14
The azimuthal quantum numbers for the sub shells are as follows
( s ---> 0
p----> 1
d----> 2
f ----> 3 )
Someboyd please helppppppp!!!
Sodium: Na+
Iron (II): Fe2+
Iron (III): Fe3+
Titanium (IV): Ti4+
Vanadium (V): V5+
Ammonium: NH4+
I hope this helps! :)
How many moles is 78.0 grams of sodium?
Answer:3.39
Explanation:
Please help me.
a 750 sample of technetium-99 decays in 4 half lifes, how much of the sample will remain?
Answer:
93.75
Explanation:
In first half life 750×1/2 will remain
In second one half from that remained at the end of first half life will remain
That is 1/2 × 750×1/2
likewise at the end of 3rd half life 1/2 × 1/2 ×750×1/2 remains
at the end of 4th half life 1/2 × 1/2 × 1/2 ×750×1/2 remains
1/2 × 1/2 × 1/2 ×750×1/2 = 93.75 remains.
You can also use the equation
Remainder = X × 1/2^n .
This saves time
n= no. of half lives
X= initial amount
so in this case 1/2^4 × 750 = 93.75
I need help with this! I don't fully understand it
Answer:
1. highest is 25.7c° and lowest is 20.0c°
2.Is Exothermic. An Endothermic Reaction is a chemical reaction that absorbs energy in the form of light or heat. In it, the energy or enthalpy of the reactants is less than that of the products. An Exothermic Reaction is a chemical reaction that gives off energy in the form of light or heat.
3. Reactans.
4. The substance(s) to the left of the arrow in a chemical equation are called reactants. A reactant is a substance that is present at the start of a chemical reaction. The substance(s) to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.
How many moles are present in 1.39 grams of carbon?
Answer:
0.116 moles
Explanation:
To go from grams to moles, you take the given mass (1.39g) and divide it by the molar mass (which is about 12 grams for Carbon). This gives you the moles. I have attached my work below.
Hope this helps! :^)
Which of the following is NOT a conductor of heat?
A. a plastic pot handle
B. a copper pan
C. a metal spoon
A) A plastic pot handle.
Explanation:Metals are very good conductors of heat because they contain delocalised electrons that can flow through the metal, transferring heat.
Both a copper pan and a metal spoon are made of metals, so are very good conductors of heat.
Plastic is an insulator, the opposite of a conductor. This makes it very bad at conducting heat, which is why it is used as the handle (it stops you burning yourself when you hold the pot). The answer is therefore A.
Se dispone de un recipiente de 60 litros que contiene un gas de 1,64 atm y a una temperatura de 100K ¿Cuántos moles de gas hay? *
En este caso, dado que se describe un gas del que se conoce el volumen (60L), la presión (1.64 atm) y la temperatura (100K), es posible usar la ecuación del gas ideal para calcular los moles que hay presentes a estas condiciones:
[tex]PV=nRT[/tex]
Ahora, despejamos las moles del gas como sigue:
[tex]n=\frac{PV}{RT}[/tex]
Finalmente, reemplazamos los valores dados, teniendo en cuenta que R es 0.08206 en atmosferas, litros y Kelvin:
[tex]n=\frac{1.64atm*60L}{0.08206*100K}\\\\n=11.8mol[/tex]
Ver más:
https://brainly.com/question/15890754 https://brainly.com/question/22946811Is the gin world scary?
Answer:
Gin= Machine that picks cotton
Explanation:
This Machine was used in the early 1940s to help pick cotton to make things.
During secondary active transport, the movement of one substance down its electrochemical gradient provides the force to move another substance up its electrochemical gradient. When both substances move in the same direction the mechanism is referred to as a(n)
Given what we know about the mechanisms surrounding the biological movement of substances, we can confirm that when two substances in a secondary active transport move in the same direction, it is called a symport.
A secondary active transport harnesses the electrochemical energy generated by its movement of one substance, to aid the movement of the other. These movements can be of two types, depending on the directions:
AntiportSymportAn antiport transport will move both substances in opposite directions, meaning one out of the cell and one into the cell. The transport described in the question is that of a symport, given that it moves both substances in the same direction.
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Where does the energy come from to break the bonds of water and carbon dioxide molecules?
Answer:
carbohydrates
Explanation:
or carbon dioxide
under which conditions do you expect helium gas to deviate most from ideal behavior?
Answer:
Explanation:
[2-0] NC Special Operation
[2] Supervisor
[2-1] Emergency Response
[2-2] Juggernaut
[2-3] Commander
[2-4] Division Director
An atom of sodium has 11 electrons. Make a sketch of a sodium atom, showing how many electrons it has at each energy level. Infer how reactive sodium atoms are.
SOMEONE PLEASE HELP ME OUT. :( I DONT GET IT !!!
Answer:
Sodium has 11 electrons. The first two fill the innermost energy level. The second energy level is also full, holding eight electrons and one electron remaining in the outer energy level. It is the number of outer electrons that give an element its chemical properties.
Explanation:
Sodium has 11 electrons. Therefore electronic configuration of sodium is (2,8,1).
What are electrons?
Electrons are the negatively charged particles of an atom. An atom contains a positive proton, a negative electron, and a neutral neutron. Electrons are negatively charged particles that rotate around the atom.
There are around 118 elements in the earth. Sodium is a important element. The atomic number of sodium is 11. The first shell contains 2 electrons, 2nd shell contains 8 electrons and 3rd shell will have 1 electron in sodium.
Sodium is a metal. It will loose that one electron and become cation. It become Na+.
Therefore, Sodium has 11 electrons. Therefore electronic configuration of sodium is (2,8,1).
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discuss the solubility differences between the halogens and the halides in both hexane and water. be sure to define what a halogen and halide are to foundation your discussion.
Halides are ionic substances while halogens nonpolar substances. Hence, halides dissolves in water while halogens dissolve in hexane.
A halogen is an element in group seventeen. The name halogen means salt former. This name came about because many of the halogens form salts. Halides are salts formed by the halogens.
Halogens are diatomic covalent molecules. As such, they are nonpolar molecules and can only effectively interact with nonpolar solvents. Benzene is a nonpolar solvent hence it acts as an effective solvent for the halogens.
The halides are polar compounds hence they do not dissolve in nonpolar solvents such as hexane. Rather, halides dissolve in polar solvents such as water due to dipole - dipole interaction between the ions in the halide and the dipoles in water.
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Which of the following are required for plants to carry out photosynthesis?
Group of answer choices
soil
water
carbon dioxide
oxygen
sunlight
Answer:
Carbon dioxide, water, and sunlight
Explanation:
What is the relationship between the pressure of a gas and the absolute
temperature?
they don't have any relationship between them
Nitric acid reacts with zinc oxide.
State the names of the products of this reaction.
……………..and ....……..
Answer:
Zinc reacts with concentrated Nitric acid to produce Zinc nitrate, nitrogen dioxide and water.
That's all I know, sorry if it isnt coplete or the answer you wher looking for.
Type the correct answer in each box to complete the table. Use numerals instead of words.
Determine the least common multiple of the charges for each combination of elements in the table. Ignore the plus (+) and minus (−) signs of the charges and just enter numerals. The first row is completed for you.
The least common multiple of the charges for each combination of elements in the table. Ignoring the plus (+) and minus (−) signs of the charges and just entering the numerals. The table is complete as follows.
chlorine(Cl) oxygen(O) nitrogen(N)
Lithium(Li) 1 2 3
magnesium(Mg) 2 1 3
aluminium(Al) 3 2 1
How charged species formed?The charged species formed by losing and gaining of an electrons from an atoms and which called ions.If an atoms lose one and more an electrons then positive charged species formed called cation. If an atoms gain one and more an electrons then positive charged species formed called an anion.To learn more about charged species here.
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Answer: the first one is incorrect
Explanation:
What is atomic mass? the mass of the atom based on the mass of an atom of hydrogen-1 the mass of an atom based on the mass of an atom of carbon-12 the mass of the atom based on the mass of an atom of oxygen-16 the mass of an atom based on the number of electrons
Answer:
The mass of an atom based on the mass of an atom of carbon-12
Explanation:
a
A sample of gas has a volume of 3.50 L and a pressure of
125 mm Hg. What will the new pressure be when the volume
is decreased to 2.75 L? The temperature stays the same.
Answer:
159.09 mmHgExplanation:
The new pressure can be found by using the formula for Boyle's law which is
[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]
where
P1 is the initial pressure
P2 is the final pressure
V1 is the initial volume
V2 is the final volume
From the question we have
[tex]P_2 = \frac{125\times3.50 }{2.75} = \frac{437.5}{2.75} \\ = 159.090909...[/tex]
We have the final answer as
159.09 mmHgHope this helps you
what makes your pulse? Explain
what is the name of the high-energy compound that cells use to fuel chemical reactions?
Answer: Adenosine triphosphate, or ATP, is the primary carrier of energy in cells. The water-mediated reaction known as hydrolysis releases energy from the chemical bonds in ATP to fuel cellular processes.
Explanation:
How are mitosis and meiosis similar? How are they different? Provide 1 way the two processes are the same and 2 ways the 2 processes are different.
Answer:
Similar: both processes of cell division; both processes take place in the nucleus of the cell
Different: mitosis divides into 2, meiosis divides into 4; one is the division of body cells and the other is of specifically sex cells
Explanation:
https://byjus.com/biology/mitosis-and-meiosis/
^ this has more info!
What is an empirical formula
Answer:
a formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.
Explanation:
Answer:
Meaning of Empirical formula :- A formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.Defination of Empirical formula :- The empirical formula of a chemical compound is the simplest whole number ratio of atoms present in a compound. A simple example of this concept is that the empirical formula of sulfur monoxide, or SO, would simply be SO, as is the empirical formula of disulfur dioxide, S₂O₂.Explanation:
Hope this helps you XD ✌️Carry on learning !!what is the total number of valence electrons in ethyl acetate?
Answer: There are 36 valence electrons.
Explanation:
Two or more than two atoms with different physical or chemical properties can not combine together to form an element. Therefore, the valence electrons of C₄H₈O₂ is 32.
What is element?Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same.
A valence electron is a negatively charged particle, located in the outermost shell of an atom, that can be transferred to or shared with another atom. To calculate total valence electrons in C₄H₈O₂, we need to add the individual valence electrons of each element.
Valence electrons of C₄H₈O₂= {valence electrons of C×4}+{valence electrons of H×4}+{valence electrons of O×2}
Valence electrons of C₄H₈O₂= {4×4}+{1×4}+{6×2}
Valence electrons of C₄H₈O₂=32
Therefore, the valence electrons of C₄H₈O₂ is 32.
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Complete the sentence.
Atoms form chemical bonds to satisfy the ______
rule and to become _______
If I am calculating the volume in pv=nrt
Then, how do I know what units it is in coz normally it would be m3 but how do I know that it's not dm3
Explanation:
If you use the SI units for P, n, R and T ( In Pa, mol, JK-1mol-1 and K respectively) you'll end up with a Volume with m3 units. So if you have others in different units first convert them into the units I mentioned above and you will definitely get the answer in m3.