Answer:
O
Explanation:
they have O valence electrons
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Answer:
76
120
Explanation:
the upper number is the sum of Protons and neutrons. and the lower one is the number of Protons! to find the number of neutrons, all you have to do is: upper number-lower number=number of neutrons
what element is 1s2 2s22p6 3s23p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f10
The given electronic configuration is that of an element named dysprosium.
What is electronic configuration?Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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before they react and form chemical compounds with other atoms ALL atoms are electrically neutral
A. True
B. False
Answer: true
Explanation:
Definition of periodic trends
Write the chemical formula for the following: silver cyanide
Answer:
AgCN
Explanation:
Ag+C=N
What is the mass of 0.042 mole C8H18
Hope this help you!!! :))
The mass of C8H18 is 4.788g
In chemistry,
The number of moles of a compound is given as Mass/ Molar mass
For C8H18, The molar mass will be calculated as
C8H18=12 x 8 +1 x 18=96+18=114 g/mol
Putting the value in the equation
Number of moles= Mass/Molar mass
0.042moles =Mass/ 114g/mol
Mass=0.042 x 114=4.788g
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4. A 100.0 mL sample of 0.2516 M aqueous barium chloride was treated with an excess of sulfuric acid. The
resulting barium sulfate precipitate was filtered, dried, and found to have a mass of 4.9852 g. Compute the
percentage yield of barium sulfate in this process.
Which of the following is true about an object falling on Earth?
A.The force of air resistance makes the object fall faster.
B.The force of air resistance counteracts the force of gravity.
C.The force of air resistance acts in the same direction as the force of gravity.
Identify the error in the following statement:
A scientific theory is well-substantiated, fact-based, and unchangeable.
O A. Scientific theories can change as scientists continue to test ideas and gather evidence.
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B. The statement is describing a hypothesis rather than a scientific theory.
O
C. A scientific theory is not well-substantiated.
D. A scientific theory is not fact-based.
What is the mass of 4.02 mol Ba(NO2)2
Hope this help you;)))
Considering the definition of molar mass, the mass of 4.02 mol Ba(NO₂)₂ is 921.9468 grams.
Molar mass is the mass of one mole of a substance, which can be an element or a compound.
Therefore, knowing the molar mass, the mass can be calculated using the expression:
mass= moles× molar mass
In the periodic table, you can find the molar mass of the elements, also called atomic mass or atomic weight.
To calculate the molecular mass of a compound, also called mass or molecular weight, you must add the molar mass of the elements of the compound multiplied by the number of atoms of each element that make up the compound.
In this case, being the atomic mass:
Ba: 137.34 g/moleN: 14 g/moleO: 16 g/moleThe molecular mass of Ba(NO₂)₂ can be calculated as:
Ba(NO₂)₂= 137.34 g/mole× 2× (14 g/mole +2×16 g/mole)
Ba(NO₂)₂= 229.34 g/mole
Then, the mass of 4.02 mol Ba(NO₂)₂ can be calculated as:
mass= 4.02 moles× 229.34 g/mole
mass= 921.9468 grams
Finally, the mass of 4.02 mol Ba(NO₂)₂ is 921.9468 grams.
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https://brainly.com/question/13763038?referrer=searchResultshttps://brainly.com/question/12225144?referrer=searchResultshttps://brainly.com/question/20486507?referrer=searchResultsDescribe two substances that are useful because of their viscosity
Find any errors in the orbital notation diagrams below and correct them.
Answer:
See explanation.
Explanation:
A. 2s is incorrect, the right arrow should be pointing downwards.
B. In 2p, the last box has 3 arrows. This is invalid. Each box can only store 2 arrows(electrons). The last arrow should be moved to a 3p orbital (new box).
C. In this one, the arrows switched directions (left is down and right is up). You could fix each box or just the last one (in 3p) to point downwards.
what happen when two light waves traveling from oppsite direactions meet?
Answer:
When two or more waves meet, they interact with each other. The interaction of waves with other waves is called wave interference. Wave interference may occur when two waves that are traveling in opposite directions meet. The two waves pass through each other, and this affects their amplitude
Explanation:
hope this helps!
12
How many electrons shells would an atom of Sulfur have?Locate on your Periodic Table*
(5 Points)
03
6
16
O 32
13
What is the total number of carbon atoms in 10C4H10?
Answer:
40 C atoms
Explanation:
Step 1: Write organic compound
10C₄H₁₀
We see here that in 1 mol of C₄H₁₀, we would have 4 atoms of C.
We are given that we have 10 moles of C₄H₁₀.
Therefore, we have 4 · 10 = 40 atoms C
The group that has a single factor changed in an experiment is called:
Answer:
the experimental variable
Explanation:
Help please! Which of earth's layers is responsible for creating the earth's magnetic field?
A. inner core
B. outer core
C. mantle
D. crust
Answer:
inner core
Explanation:
Answer:
The outer core.
Explanation:
There is liquid metal, like iron, which creates electric currents going through the ground. When the Earth rotates on it's axis, it creates a magnetic field.
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largest atomic radius in period 4 row
Answer:
hi
Explanation:
Thus, helium is the smallest element, and francium is the largest.
describe a procedure to remove the water from the mixture that passes through the filter and collects in the beaker.
Answer:
The procedure is Filtration
Explanation:
Filtration is a process that is use to separate insoluble solid from liquid for example Salt and water.
This process uses filter paper which is placed inside a funnel and then placed inside a beaker.
The mixture of sand and water is poured into the the filter paper and water then drains out down to the funnel and the beaker.
The solid part remain at the filter paper and it is called the residue and the water is the filtrate.
the number of electrons if not ionized
Your answer
Answer:
What????
Explanation:
20 characters
what is the role of the sun in forming convection currents in earths water and air?use scientific reasoning to construct your answer.
Answer:
The heating of the Earth's surface and atmosphere by the sun drives convection within the atmosphere and ocean. This convection produces winds and ocean currents. The greater the pressure differences between a low-pressure area and a high-pressure area, the stronger the winds. I hope this helps
The sun heats the air near the equator of the earth, it becomes less dense and rises upward. As warm air rises, it cools and gets less dense than the air around it.
What is convection?Convection can be d defined as the transfer of heat from one place to another due to the movement of heat or fluid. Convective heat transfer involves the processes of conduction as well as advection.
Gases and liquids can not be good conductors of heat under normal conditions, but they can easily transfer heat.
Convection occurs through diffusion or advection but does not take place in solids, as there is no movement of its constituent particles happens. The diffusion of heat in solids is known as thermal conduction.
The heat transfer that occurs between a surface and a liquid that is in contact with the surface is convection heat transfer.
The Sun provides the energy for the convection in the ocean and produces ocean currents. There are two kinds of ocean currents: one is surface currents and the other deep currents.
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Which property of metals allows aluminum to be flattened into thin sheets of aluminum foil?
O shininess
O malleability
O brittleness
O hardness
Answer:
malleability
Explanation:
Answer:
The answer is Malleabillity
Explanation:
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why is it important for a measurement system to have an international standard ?
Answer:
Mark me brainliest
Explanation:
Standards help avoid confusion and ambiguity when taking measurements. For example, a meter will always be the same length, no matter who is taking the measurement or where it is being taken.
Which is an example of how water is used inside and around the home?
fishing in a lake
washing clothes at the laundromat
brushing teeth before bed
washing a car in an automatic carwash
An example of how water is used inside and around the home is brushing teeth before bed. Details about water management can be found below.
How is water utilized?Water is a inexhaustible or renewable resource that can be used for domestic and personal purposes.
Water can be used around the home in the following ways:
Brushing of teethTaking one's bathDoing dishesTherefore, an example of how water is used inside and around the home is brushing teeth before bed.
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when 1337 G of solid dry ice sublimates into gas the mass of the resulting gas is
Answer:
194.65 K
Explanation:
(−78.5 °C −109.3 °F)
Answer:
equal to the mass of the solid dry ice.
Explanation:
The mass of the gas is dependent on the mass of the solid dry ice.
The density of zinc is 7.13 g/mL. What would be the volume of a 300.0 g sample of this metal?
Answer:
The answer is 42.08 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
From the question
mass of metal = 300 g
density = 7.13 g/mL
We have
[tex]volume = \frac{300}{7.13} \\ = 42.07573632...[/tex]
We have the final answer as
42.08 mLHope this helps you
An ordered list of chemical substances is shown.
Chemical Substances
1 CuO
2 O2
3 CO2
4 NO2
5 Fe
6 H2O
Which substances in the list can be some of the reactants and products in the same combustion reaction? (4 points)
A. 1, 2, and 3
B. 2, 3, and 6
C. 1, 4, and 5
D. 1, 2, and 5
answer : the correct option is, (B) 2, 3 and 6.
Answer:
b
Explanation:
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What do animals mean to you?
A)Lovable fur friends
B)Speacial to you
C)They are just animals
D)Who cares
Answer: OMG EMMM, PLZ ANSWER ME, I REALLY MISS U , plz come back...
Explanation:
the horse is probably hungry observation or inference science
Answer:
observation
Explanation:
hope it is correct
Answer:
Inference science
Explanation:
Your inferring that the horse is hungry. The word 'probably' infers that the horse may be hungry.
coefficient of 3MgCl2?
