Answer:
This question appears incomplete
Explanation:
This question appears incomplete because of the absence of options. However, hydrogen is placed in group 1 because it has just one electron in it's outermost shell (which happens to be the only shell it has) just like every other group 1A/group 1 element. While helium is placed in group 8A/group 18 because it has a completely filled outermost shell (which is also the only shell it has) just like every other element in group 8A/group 18.
In the periodic table hydrogen is placed in Group 1A (group 1) and helium is placed in Group 8A (group 18). The most likely reason for this is configuration, energy level and properties.
Hydrogen is located in group 1 of the periodic table, although its electronic configuration is 1s¹ and its properties do not correspond to those of the alkali metals of that group. But in its electronic configuration you can see that it has only one electron in its outermost shell (which turns out to be the only shell it has), just like any other element of group 1A /group 1, so it is located in that group.
On the other hand, although the electronic configuration of helium is 1s², this element does not appear in group 2 of the periodic table of elements, but is placed in group 18. This is because it has the energy level complete, so it has the properties of a noble gas, that is, it is inert (it does not react), and it is a colorless and odorless monatomic gas.
In summary, in the periodic table hydrogen is placed in Group 1A (group 1) and helium is placed in Group 8A (group 18). The most likely reason for this is configuration, energy level and properties.
Learn more:
https://brainly.com/question/11453962?referrer=searchResultshttps://brainly.com/question/14658500?referrer=searchResultshttps://brainly.com/question/12250124?referrer=searchResultsWhich option will increase the rate of reaction?
Answer:
Explanation:
there's no options that you put but usually if you add more of the reactant the rate will increase, adding a catalyst will increase the rate, and increasing the temperature if it's endothermic
The ocean both absorbs and releases heat more slowly than land does
True or false.
Chemical bonding is the combining of elementa to form
-energy levels
-atoms
-electrons
-compounds
which atom or ion is the largest?
A. K
B. K^+
C. Ca
D. CA^2+
E. Li
Answer:
A
Explanation:
Which statement best describes the process of the formation of the solar system?
Formation. Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material
What role does the Automated Surface Observing Systems (ASOS) play in weather forecasting?
Answer:
What role does the Automated Surface Observing Systems (ASOS) play in weather forecasting? It is a system of radar sensors used to track storms. It is the nation's primary weather-observing network. It provides weather reports much like the National Weather Service.
Explanation:
Answer:
the answer is c).It is the nation's primary weather-observing network.
Explanation:
4. Hot material in the Earth's mantle rises and cool material
sinks. This is an example of
a. conduction
b. convection
c. radiation
d. none of these
Answer:
Th answer is b. convection.
Explanation:
As the heat rises it cools down and it sinks and as the cold sinks it heats up so then it rises back up.
If You are given 14 moles of C2H5OH(Ethanol) and 13 moles of O2( Oxygen), how
many moles of the limiting reactant is produce? C2H5OH + O2 -> CH3COOH +
H2O
Explanation:
1 ) first u have to balance the equation but in this case it is already balanced.
2) checking for the limiting reactant:
13 mol O2 × (1mol H2O / 1mol of O2) = 13 mol of H2O
14 mol of ethanol × (1mol H2O/ 1molof ethanol) = 14 mol of H2O
the less amount of moles produced from the O2 so the limiting reactant is oxygen
3) calculating the products moles
13 mol O2 × (1mol H2O / 1mol of O2) = 13 mol
13 mol O2 × (1mol Ch3Cooh / 1mol O2) = 13 mol
note: the ratios obtained from the balanced equation
4) the excess reagent is the ethanol 1 mol will be remain
pb3(po4)2 compound name
Answer:
Lead phosphate
Explanation:
Pb3(po4)2 has the compounded name of lead(II) phosphate.
What is lead(II) phosphate like ?It is a white, crystalline solid that is insoluble in water. Lead(II) phosphate is used in some paints and plastics, and it is also used as a pigment.
The name of the compound is based on the oxidation state of the lead atom. Lead can have two oxidation states, +2 and +4. In Pb3(PO4)2, the lead atom has an oxidation state of +2, so the compound is named lead(II) phosphate.
The phosphate ion has an oxidation state of -3, so there are two phosphate ions in the compound to balance the +6 charge of the three lead atoms.
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heyy pls help anyone?
Answer:
i agree
Explanation:
PLEASE HELP!
How many moles of NaOH would produce 10 moles of water in this reaction?
2NaOH + H2SO4 → Na2SO4 + 2H20
Answer:
The correct answer is 10
How do I do an energy profile diagram
Answer:
first u have to like draw like a number line uk how dey do in math but instead of num u add wht eva da question askin u
Explanation:
Vocab Term
Letter of matching definition
Definition
Proton
E
A) An element containing a charge.
Neutron
K
B) The defined distances away from the nucleus that electrons exist.
Electron
M
C) The electrons exclusively on the outermost energy level
Neutral
L
D) A model of the atom that shows rings for energy levels and the total number of electrons in each energy level
Ion
E) A subatomic particle found in the nucleus with a positive charge
Cation
I
F) A negatively charged ion
Anion
F
G) The different shaped zones where electrons can be found most of the time but have undefined paths within.
Energy Level
L
H) A model of the atom that simply shows the element abbreviation and the number of valence electrons
Orbital
D
I) A positively charged ion
Valence Electrons
J) A model of the atom that shows the truest shape of the atom by showing orbitals stacked on top of each other to form layers of energy levels.
Quantum Mechanical Model
J
K) A subatomic particle found in the nucleus with no charge
Bohr’s Model
L) The state of an atom having no charge
Lewis Dot Structure
H
M) A subatomic particle found outside of the nucleus with a negative charge.
Answer:
E
Explanation:
took the test
the process that breaks down rocks
How many molecules are there in 8.25 moles of CaHia?
The number of molecules : 4.967 x 10²⁴
Further explanationA mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
8.25 moles of C₈H₁₈
The number of molecules :
[tex]\tt 8.25\times 6.02\times 10^{23}=4.967\times 10^{24}[/tex]
asthenosphere
OA.
oceanic continental convergent boundary
B.
oceanic-oceanic convergent boundary
O c.
divergent boundary
D.
transform boundary
Awnser I know if ur right I’ll mark brainlesst
Answer:C
Explanation:The samples are composed of different proportions of copper and zinc
Which option is a compound?
Examples of compounds include table salt or sodium chloride , sucrose (a molecule, nitrogen gas, a sample of copper, and water.
The _____ law of thermodynamics states that when two objects of different temperature are in contact, heat energy will flow from the hotter to the cooler object.
Answer:
Second.
Explanation:
There are four types or kinds of the laws of thermodynamics, but in this question we are actually considering the second law of thermodynamics.
The second law of thermodynamics, in a simple sense means that energies can flow in an equilibrate manner. It can also be stated as the total entropy of the universe. The second law is normal refer to as Law concerning Entropy.
Thus, filling the gap in the Question above. Note that the word written in capital letters is the missing word.
"The SECOND law of thermodynamics states that when two objects of different temperature are in contact, heat energy will flow from the hotter to the cooler object."
HELP!! PLEASE 10+ points!
Can you tell from the masses of the reactants which one of the reactants will be the limiting reactant? Defend your answer (use an equation within your defense).
Answer:
Explanation:
so, limiting reactants are the reactant which limit the continuing of the reaction or in simple word they are the element that run out first and are totally consumed
equation :
2koh+h2so4⇒ k2so4 +2h2o
if we have 4 mol of h2so4 and 3 mol of 2koh
number of produced moles of k2so4 on consuming all :
h2so4 ⇒ k2so4
1 mol 1 mol
4 mol ?mol
no of mol of k2so4 if all h2so4 is consumed 4 mol
2koh⇒ k2so4
2 mol 1 mol
3 mol ?mol
no of mol of k2so4 if we consume all koh = 1.5 mol
since the koh produces less mol on consuming it all
the koh is the limiting reactant
Are these correct?? Help please
Is Steel a compound?
Steel is a mixture of iron and carbon fused together with one or more other metals or nonmetals. Because steel is a mixture rather than a chemical compound, steel does not have a set chemical compound formula.
Answer:
No
Explanation:
Steel is a mixture of iron and carbon fused together with one or more other metals or nonmetals. Because steel is a mixture rather than a chemical compound, steel does not have a set chemical compound formula.
What mass of water must be used to dissolve 0.500 kg C2H5OH to prepare a 3.00 m solution?
Answer:
500g Ika= 10.85 mol 500g (46.0699) - 10.35 mol - 3.00m - 13.62 kq 5.
Explanation:
Does this help?
A 3.00 M solution of [tex]C_2H_5OH[/tex] would be prepared by dissolving 0.500 kg of [tex]C_2H_5OH[/tex] in 3.62 kg of water.
Stoichiometric calculation0.500 kg [tex]C_2H_5OH[/tex] is equivalent to (mole = mass/molar mass):
500g/46.07 = 10.85 moles of [tex]C_2H_5OH[/tex]
3.00 M solution of [tex]C_2H_5OH[/tex] can be prepared by dissolving 10.85 moles in (molarity = moles/volume):
10.85/3 = 3.62 Liters of water
3.62 liters of water weighs (density = mass/volume);
1 x 3.62 = 3.62 kg
Thus, 3.62 kg of water will be required to prepare the solution.
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Why is our mindset more important when you try to learn remotely than when you are learning face to face?
Answer:
It is more important because of the freedom.
Explanation:
While at home you can do your work of course... but you could lay down, take a nap. You could get on the game, play around. You could draw, and fiddle and dance and do WHATEVER you want with no teacher to stop you so you have to be your own motivation. You have to be your own teacher or its VERY easy to fail.
The “rise” of the muffin is caused by the release of ___________ gas trapped in the mix as it is heated. carbon dioxide hydrogen oxygen helium
Answer:
Carbon dioxide
Explanation:
In the making of the muffins, there are many ingredients are used including flour, egg, butter, sugar, and flavoring of fruits. There is also a raising agent, the baking powder or baking soda used that reacts with the batter.
This reaction form bubbles of carbon dioxide, trapped in the air spaces during the baking and muffin raises. Carbon dioxide makes muffins light, by lifting the batter as it bakes.
What is the molar mass of H2SO4?
Answer:
98.08g/mol is your answer
Explanation:
hope this helps
what is polling in chemistry?
Answer:
Polling is a method used for the purification of copper or tin which contains oxide impurities
Answer:
Polling is used for the purification of copper or tin which contains oxide impurities. The impure metal is melted and stirred with green logs of wood. The heat of molten metal makes the green logs to liberate hydrocarbon gases which in turn reduce the metal oxide into metal.
How many moles of Nitrogen gas are in 135L of Nitrogen gas at STP?
Explanation:
P×V=n×R×T
L×atm / mol×K
n= PV /RT
Description:
So as we know that our Known variables: are P, V, R, T and our unknown variables are n. N= PV / RV. = 6.02 moles.
Answer: 6.02 moles
Hope this helps.
The moles of nitrogen gas present in 135 L at STP have been 6.02 moles.
The nitrogen gas has been assumed to be the ideal gas. For an ideal gas, at STP or standard pressure and temperature, the volume of 1mole of gas has been 22.4 L.
The STP conditions have been 273.15 K temperature, and 1 atm pressure.
Since, moles in 22.4 L gas been 1 mole. The moles in 135 L gas has been:
22.4 L = 1 mole
135 L = [tex]\rm \dfrac{1}{22.4}\;\times\;135\;moles[/tex]
135 L gas = 6.02 moles.
The moles of nitrogen gas present in 135 L at STP have been 6.02 moles.
For more information about the volume at STP, refer to the link:
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Which formula represents a tetrahedral molecule?
LiBr
CO2
H₂
SIF4
um this is kinda weird I am take a guest SIF4
The formula that represents a tetrahedral molecule is SiF₄. The correct option is the fourth option - SIF4
From the question,
We are to determine which of the given formulae represents a tetrahedral molecule
In order to determine the molecule that represents a tetrahedral molecule, we will determine which of the molecules has a tetrahedral molecular geometry.
A tetrahedral molecular geometry has a central atom located at the center with four substituents that located at the corners of a tetrahedron
Among the given options, the molecule that has four substituents is SiF₄. Si is the central atom and the F atoms are the substituents.
Hence, the formula that represents a tetrahedral molecule is SiF₄. The correct option is the fourth option - SIF4
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When is electrolysis used to extract metal?
Answer:
Explanation:
electrolysis is the technique that use direct current to drive a non spontaneous chemical reaction chemical reaction is the gain or lose of electron this technique is use to extract metal from theirs ores
Heyy, I am a 14 year old girl