Let us explain about green house gases
Explanation:
Green house effect
It can be explained as :
The sun emit radiations that consist of infra red rays , ultra violet rays and visible light .The infra red rays (responsible for heating ) when come from sun , it travels through atmosphere and reaches earth surface .On striking the earth surface , it gets reflected and reflected infra red ray has greater wavelength .Then this reflected rays moves back through atmosphere .On doing so , they encounter certain gas molecules like carbon dioxide , methane etc .This gases absorb these rays and do not let them to escape through them .As a result, they get trapped .As we have already mention that they cause heating effect , due to this property they raise the temperature of atmosphere leading global warming .Use the periodic table to determine the electron configuration for Ca and Pm in noble-gas notation
Ca:
Pm:
✓
Ca:
[Ar]4s
[Ar]4s
[Xe]6s2506
[Xe]6s25f4
Pm:
[Xe6s245
[Xe]6s244
[Ar]3s2
[kr]452
Answer:
Ca: [Ar] 4s²
Pm : [Xe} 6s² 4f⁵
Explanation:
The electronic configuation of an element in noble gas notation is written by giving the symbol of the nearest noble gas that is present in the period above it in the periodic table, followed by the electronic configuration of the remaining electrons.
For Ca the atomic no is 20
It is in 4th period.
The electronic configuration of Ca is 1s²2s²2p⁶3s²3p⁶4s²
1s²2s²2p⁶3s²3p⁶ represents the electronic congiguation of Ar with completely filled valence shell. So we can represent electronic configuration of Ca as [Ar] 4s².
The atomic no. of Promethium,Pm is 61. It's electronic configuration is
1s²2s²2p⁶3s²3p⁶4s² 3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f⁵
1s²2s²2p⁶3s²3p⁶4s² 3d¹⁰4p⁶5s²4d¹⁰5p⁶ is the configuration of the noble gas Xe . So we can represent electronic configuration of Pm as
[Xe} 6s² 4f⁵
Answer:
Ca: [Ar] 4s²
Pm : [Xe} 6s² 4f⁵
Explanation:
The simulation shows a quantity of oxygen molecules. What state of matter is this?
Answer:
It should be gas.
Explanation:
It should be gas but I don't see the simulation so it's possible that it's solid/liquid
When an ion is positive is has____ electrons
Answer:
When an ion is positive is has "more protons than" electrons
Explanation:
In case of an atom when gets involved with other atom due to uneven nos. of electrons and the protons, the atom formed is known as the ion. When, the atom has higher number of electrons than that of the protons it will form an negative ion. Bt in case of more number of protons as compared to the electrons it will form a positive ion. The ion with positive charge is basically called as the cation, with negative charge called as anion.
( Balance each equation) Na + MgF2 NaF + Mg
Answer:
2Na + MgF₂ → 2NaF + Mg
Explanation:
Chemical equation:
Na + MgF₂ → NaF + Mg
Chemical equation:
2Na + MgF₂ → 2NaF + Mg
The given reaction follow the law of conservation of mass because there are equal number of atoms of sodium, magnesium and fluorine are present on both side of equation.
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
This law was given by french chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
Type of reaction:
The given chemical reaction is type of single replacement reaction. Sodium replace the magnesium and form sodium fluoride.
Single replacement:
It is the reaction in which one elements replace the other element in compound.
AB + C → AC + B
there are 3.45 moles of (NH_4)_2 SO_4, how many grams is this?
Answer:
455.4 g (NH_4)2 SO_4
Explanation:
Given:
no of moles of (NH_4)2 SO_4 , n=3.45 moles
To find:
The mass (w) of (NH_4)2 SO_4 in 3.45 moles (n)of it.
Molar mass (M) of (NH_4)2 SO_4 = 132 g
No of moles n is given by the formula;
[tex]n =\frac{w}{M}[/tex]
n is no. of moles
w is mass of the compound
M is the molar mass of the compound
Substituting the values in the formula,
[tex]3.45=\frac{w}{132}[/tex]
w=3.45 × 132=455.4g
How many grams of NH3 can be prepared from the synthesis of 77.3 grams of nitrogen and 14.2 grams of hydrogen gas?
Answer:
80.41 g
Explanation:
Data Given:
Mass of Nitrogen (N₂) = 77.3 g
Mass of Hydrogen (H₂) = 14.2 g
many grams of NH₃ = ?
Solution:
First we look at the balanced synthesis reaction
N₂ + 3 H₂ ------—> 2 NH₃
1 mol 3 mol
As 1 mole of Nitrogen react with 3 mole of hydrogen
Convert moles to mass
molar mass of N₂ = 2(14) = 28 g/mol
molar mass of H₂ = 2(1) + 2 g/mol
Now
N₂ + 3 H₂ ------—> 2 NH₃
1 mol (28 g/mol) 3 mol(2g/mol)
28 g 6 g
28 grams of N₂ react with 6 g of H₂
So
if 28 grams of N₂ produces 6 g of H₂ so how many grams of N₂ will react with 14.2 g of H₂.
Apply Unity Formula
28 g of N₂ ≅ 6 g of H₂
X g of N₂ ≅ 14.2 g of H₂
Do cross multiply
X g of N₂ = 28 g x 14.2 g / 6 g
X g of N₂ = 66.3 g
As we have given with 77. 3 g of N₂ but from this calculation we come to know that 66.3 g will react with 14.2 g of hydrogen and the remaining 10 g N₂ will be in excess
So, Hydrogen is limiting reactant in this reaction and the amount of NH₃ depends on the amount of hydrogen.
Now
To find mass of NH₃ we will do following calculation
Look at the reaction
As we Know
N₂ + 3 H₂ ------—> 2 NH₃
6 g 2 mol
So, 6 g of hydrogen gives 2 moles of NH₃, then how many moles of NH₃ will be produce by 14.2 g
Apply Unity Formula
6 g of H₂ ≅ 2 mol of NH₃
14.2 g of H₂ ≅ X mol of NH₃
Do cross multiply
X mol of NH₃= 14.2 g x 2 mol / 6 g
X mol of NH₃ = 4.73 mol
So, 14.2 g of hydrogen gives 4.73 moles of NH₃
Now
Convert moles of NH₃ to mass
Formula will be used
mass in grams = no. of moles x molar mass . . . . . . (2)
Molar mass of NH₃
Molar mass of NH₃ = 14 + 3(1)
Molar mass of NH₃ = 14 + 3 = 17 g/mol
Put values in equation 2
mass in grams = 4.73 mole x 17 g/mol
mass in grams = 80.41 g
mass of NH₃= 80.41 g
Using the principles of stoichiometry, it can be calculated that while 77.3 grams of nitrogen could produce 93.5 grams of NH3, the 14.2 grams of hydrogen can only generate 80.6 grams of NH3. Hence, the reaction is limited by hydrogen and can only yield 80.6 grams of NH3.
Explanation:To figure out how many grams of NH3 can be prepared from 77.3 grams of nitrogen and 14.2 grams of hydrogen gas, you need to use the stoichiometry principle in chemistry which refers to the calculation of quantities in a chemical reaction.
The balanced chemical equation for the formation of ammonia is: N2 + 3H2 -> 2NH3. From this equation, we see that 28 grams of nitrogen (N2) react with 6 grams of Hydrogen (H2) to produce 34 grams of ammonia (NH3). Therefore, for 77.3 grams of N2, it would form (77.3/28)*34 = 93.5g of NH3 if there is sufficient H2.
However, we only have 14.2 grams of H2. Given the stoichiometry of the reaction we know that 6 grams of H2 can produce 34 grams of NH3, so 14.2 grams of H2 will produce (14.2/6)*34 = 80.6g of NH3. Hence, the amount of NH3 that can be produced is limited by the amount of H2, and only 80.6 grams of NH3 can be synthesized.
Learn more about Stoichiometry here:https://brainly.com/question/34828728
#SPJ3
Which of the following substances is a solution?
a) Acid rain
b) Table salt
c) Helium gas
d) Baking soda
Answer:
a) Acid rain
Explanation:
Because the rest are slolutes
Which of the following statements is true? An element is made of only one type of atom. Positively charged atoms have gained protons. A molecule must be made of two or more elements. Electrons and neutrons are found in the nucleus of an atom.
Answer:
The true statement is
An element is made of only one kind of atom.
Explanation:
An element is made of only one kind of atom. For example if we take element carbon it is made of carbon atoms only .
The other atatements are false.
Positively charged atoms lose electrons and don't gain electrons.
A molecule can also be made of two or more atoms of the same element. Eg H₂, P₄, Cl₂ etc.
Protons and neutrons are found in the nucleus of the atom and electrons are present outside the nucleus.
Simple diffusion is defined as the movement of
A molecules from areas of higher concentration to areas of lower concentration.
B) molecules from areas of lower concentration to areas of higher concentration.
c) water molecules across a membrane.
b) gas molecules across a membrane.
E) gas or water molecules across a membrane.
Explanation:
Diffusion
It is the movement of substances from the region of higher concentration to lower concentration .
This diffusion is shown almost negligible by solids , a little by liquids and maximum by gases .
The factors on which diffusion depends :
Inter-molecular force between particles : It is inversely proportional to diffusion .That is : more is the force , lesser the diffusion rate Inter-molecular space between particles : More is the space , more is the diffusion or vice versa .Density of substance :More is the density , less is the diffusion or vice versa .Applications of diffusion
It helps in the movement of substance in and out from the cell and its components .
It helps in spreading the fragrance when sprayed with some perfume etc .
It helps in dissolving substance in any medium
Etc
Simple diffusion is the movement of molecules from areas of higher concentration to areas of lower concentration.
Explanation:Simple diffusion is defined as the movement of
molecules from areas of lower concentration to areas of higher concentration.water molecules across a membrane.gas molecules across a membrane.gas or water molecules across a membrane.Simple diffusion refers to the movement of molecules from an area of higher concentration to an area of lower concentration. This process occurs due to the natural tendency of molecules to move from regions of high concentration to regions of low concentration in order to achieve equilibrium. This movement does not require the assistance of any external energy or transport proteins.
Learn more about Simple diffusion here:https://brainly.com/question/35891118
#SPJ6
which one of the following gases is evolved when a mixture of concentrated sulphuric acid, manganese oxide and sodium chloride is warmed?
When a mixture of concentrated sulfuric acid, manganese oxide and sodium chloride is warmed, the chlorine gas is formed.
Explanation:
NaCl + MnO₂ + H₂SO₄ -----> NaHSO₄ + MnSO₄ + H₂O + Cl₂
For balancing the equation
i) 2 Cl atoms are present at right side while 1 atom is present in left side.
Cl atoms get balanced by putting 2 before NaCl.
ii) Now there are 2 Na atoms present at left while 1 atom is present at the right side.
To balance it, put 2 before NaHSO₄.
iii) (SO₄) is 3 units on the right-hand side, 1 on the left-hand side.
Put a 3 before H₂SO₄ on the left-hand side, thus balancing the number of (SO₄) units.
iv) Balance the excess H atoms present at the left side, by putting a 2 before H₂O.
4NaCl + MnO2 + 4H2SO4 ---> MnCl2 + 4NaHSO4 + 2H2O + Cl2
When Manganese oxide reacts with sodium chloride and sulfuric acid, it gets warmed and produces manganese chloride, chlorine gas, sodium bisulfate, and water.
When this mixture is warmed it produces chlorine gas.
Which statement correctly describes two organ systems working together when the body increases its movement?
Answer:
Explanation: The respiratory system increases gas exchange, and the circulatory system circulates blood faster to deliver oxygen to muscles.
Question 15 of 32
1 Point
Which of the following pairs of elements will form ionic bonds with each
other?
The Periodic Table
O A. Lithium (Li) and iodine (1)
O B. Silver (Ag) and silver (Ag)
O C. Bromine (Br) and bromine (Br)
O D. Carbon (C) and chlorine (CI)
Lithium and Iodine will likely form an ionic bond. Lithium, a metal, will lose an electron while Iodine, a non-metal, will gain that electron, resulting in a stable electron configuration and the creation of an ionic bond.
Explanation:The formation of ionic bonds typically occurs between a metal and a non-metal element due to the transfer of electrons from the metal to the non-metal. In this case, Lithium (Li) and Iodine (I) will likely form an ionic bond. Lithium, a metal, tends to lose an electron while iodine, a non-metal, tends to gain an electron, to achieve a stable electron configuration. This exchange of electrons leads to the formation of an ionic bond with Lithium becoming a positive ion (Li+) and Iodine becoming a negative ion (I-).
Learn more about Ionic Bonds here:https://brainly.com/question/18297125
#SPJ2
Which solution is more concentrated?
A. 2.00 moles of NaOH dissolved in 1.00 liter of solution
B. 2.00 grams of NaOH dissolved in 1.00 liter of solution
2 moles of NaOH dissolved in 1 litre of solution is the solution with more concentration.
Answer: Option A
Explanation:
Concentration of solution is the measure of the amount of solute dissolved in the solvent of the solution. So this is measured using the molarity of the solution. Molarity is determined as the number of moles of the solute present in the given amount of solvent.
[tex]\text {Molarity}=\frac{\text {Moles of solute}}{\text {Amount of solvent }}[/tex]
In this present case, the option A gives the molarity of 2 M as
[tex]\text {Molarity}=\frac{2}{1}=2 M[/tex]
But the second option, mass of NaOH is given. So we have to determine the molarity. First we have to find the molar mass of NaOH. We know that 1 mole of NaOH will contain 40 g/mole.
1 g of NaOH = 40 g of NaOH
1 g of NaOH = 1/40 moles
So 2 g of NaOH will contain [tex]\frac{2 g}{40 g/mole}[/tex] which is equal to 0.05 moles of NaOH.
Thus, the molarity of 2 g of NaOH will be
Molarity = [tex]\frac{0.05 moles }{1 L}[/tex]=0.05 M
Thus, the option A is having higher concentration as the molarity is more for 2 moles of NaOH dissolved in 1 l of solution.
There are four distinct techniques used to separate mixtures described in this lesson. Name and describe each technique.
Explanation:
Mixtures
They are formed when two or more substances are simply mixed in any ratio not chemically combined with each other.
Characteristics
They can be homogeneous or heterogeneous in nature that is the constituents can be seen to have visible boundaries or they may appear to mix thoroughly. The Properties of mixtures are same as that of constituents. The constituents can be separated by physical methods. Their formations do not require or release energy as there is no bond formation or breakage involved. The Properties of mixtures like melting point & boiling points are not fixed.Let us discuss few techniques :
1. Evaporation
For example :To obtain colored component (Dye) from Ink
Materials Required : Watch glass ink (blue/ black) beaker , stand, burner.
Procedure :
Take a beaker and fill it half with water. Take ink (Blue/ black) in the watch glass and place it on the mouth of the beaker Start heating the beaker and observe. Heating is continued as long as the evaporation is taking place Heating is stopped when no any further change can be noticed on the watch glassObservation:
Evaporation taking place from the watch glass can be seen
Residue is left on the watch glass
Conclusion drawn :
it can be concluded that ,”Ink is not a pure substance but it is a mixture of dye in water which can easily be separated by evaporation method”. Ink is not a single substance2, Centrifugal method
For example : To separate cream from milk by using centrifuge method.
Materials Required : Full cream milk centrifuging machine/milk churner, jug test-tubes.
Procedure:
Take un-boiled cold milk in two test-tubes and place these test-tubes in a centrifuging machine Centrifuge it at high speed by using a hand centrifuging machine for two minute and observe.Observation
Cream floating on the milk can be seen.
Conclusion drawn
When milk is rotated at high speed then the suspended lighter particles (fats and protein molecules) bind with each other forming ‘cream’ and ‘skimmed milk’. The cream being lighter floats over the skimmed milk which can be removed easily.
3. Sublimation
For example :To separate a mixture of common salt and ammonium chloride :
Materials Required : China dish, tripod stand mixture of common salt and ammonium chloride glass funnel cotton and burner.
Procedure:
Take the mixture of sand and ammonium chloride in a china dish. Cover the china dish with an inverted glass funnel and place it on a tripod stand. Put a loose cotton plug in the opening of the funnel so as to prevent the escape of ammonium chloride vapors. Heat the china dish on a low flame and observe.Observation :
White fumes (vapors) of ammonium chloride can be seen coming out of the mixture. These white fumes start depositing as white solid on coming in contact with the cold, inner walls of the funnel. Sand salt is left behind in the china dish.Conclusion drawn: Ammonium chloride, being a volatile substance , changes into white vapors easily which deposits on the cold inner wall of the funnel. This ammonium chloride obtained is called the
A compound contains 70.18 % oxygen by mass. What mass of this compound would be needed to obtain 48.45 grams of oxygen?
Answer:
69.036 g of Compound is required to obtain 48.45 g of Oxygen.
Explanation:
Let us assume that the total mass of the compound is 100 g. So it means that this compound weighing 100 is composed 70.18 % of Oxygen or among 100 g of this compound 70.18 g is constituted by oxygen only. Hence, we can make a relation as that,
70.18 g O is present in = 100 g of a Compound
So,
48.45 g of O will be present in = X g of a Compound
Solving for X,
X = 100 g × 48.45 g ÷ 70.18 g
X = 69.036 g of Compound
Which effects would many organisms likely experience if global warming occurs? Check all that apply. disrupted food webs increased competition increased number of glaciers disrupted life-cycle events forced relocation
Answer:
Disrupted food webs
increased competition
disrupted life-cycle events
forced relocation
Explanation:
The results of global warming can be devastating for every living organism. Global warming will cause mist of the organisms of a species to die as they will not be able to maintain themselves in such heated environments. As a result, there will be more competition for resources among different organisms. Organisms will be forced to leave their habitats and relocate themselves as a result of global warming.
Answer:
Disrupted food webs
increased competition
disrupted life-cycle events
forced relocation
Explanation:
after 40 days have passed, how many grams of a 250-g sample of thorium-234 would remain?
78.78 g out of 250 g of Thorium-234 would remain after 40 days.
Explanation:
All radioactive samples are unstable in nature and so they will be decaying with time. So the equation of disintegration of the radioactive element is given as
[tex]N=N_{0}e^{-kt}[/tex]
So N is the mass of the radioactive element at time t and [tex]N_{0}[/tex] is the mass of the radioactive element at initial stage. Here k is the disintegration constant and t is the time.
We can determine the disintegration constant from the half life term of any element.
[tex]Half life = \frac{0.693}{k}[/tex]
So, [tex]k = \frac{0.693}{Half life}[/tex]
Since, the half life time of thorium-234 is known to be 24 days. Then, the disintegration constant is
[tex]k = \frac{0.693}{24}=0.028875[/tex] [tex]days^{-1}[/tex]
As the given questions have the initial mass [tex]N_{0}[/tex] as 250 g and t is given as 40 days, then the mass after 40 days will be
[tex]N = 250 * e^{-0.02887*40}= 250 * e^{-1.1548}=78.78 g.[/tex]
Thus, 78.78 g of thorium-234 would remain after 40 days.
To determine how many grams of thorium-234 would remain after 40 days, we need to understand the concept of radioactive decay. Using the formula for remaining mass, the approximate remaining mass would be 28.69 grams.
Explanation:To determine how many grams of thorium-234 would remain after 40 days, we need to understand the concept of radioactive decay. Thorium-234 undergoes radioactive decay with a half-life of 24.1 days. This means that after 24.1 days, half of the thorium-234 sample would decay.
To calculate the remaining grams after 40 days, we can use the following formula:
Remaining mass of thorium-234 = Initial mass × (1/2)^(number of half-lives)
Substituting the values, we have:
Remaining mass of thorium-234 = 250 g × (1/2)^(40/24.1)
Using a calculator, the remaining mass of thorium-234 after 40 days would be approximately 28.69 grams.
Learn more about Radioactive decay here:
https://brainly.com/question/1770619
#SPJ3
Jöns Jakob Berzellus _.
developed atomic theory
created the Periodic Table of Elements
proposed the planetary atomic model
Invented the chemical notation system
Answer:
Jöns Jakob Berzellus _
Invented the chemical notation system
Explanation:
Meaning of chemical notation : It is the representation of chemical composition of element by symbols.
Berzelius was the first person to measure accurate atomic weight of the elements, which helped to confirm Dalton's Atomic Theory.
He described how chemical bonds are formed by electrostatic attraction.
Berzelius, work with atomic weight and his theory of electrochemical dualism led to the development of Chemical notation that decide the chemical notation of the compounds.This chemical notation determines about the element both qualitatively and quantitatively.
He identified that compounds can be distinguished by the opposing constituents which are the acidic constituent , the basic and the neutral part.
This formula representation is given by Berzelius.
Answer:
Jöns Jakob Berzellus
Invented the chemical notation system
Explanation:
I got this one right on my test so it is right.
What is the relationship between changes in air pressure and wind speeds?
When a high- and a low-pressure air mass are close together, air moves slowly from high to low pressure.
When a high- and a low-pressure air mass are far apart, air moves slowly from high to low pressure.
When a high- and a low-pressure air mass are far apart, air moves quickly from high to low pressure.
When a high- and a low-pressure air mass are far apart, air moves quickly from low to high pressure.
( 13 point plz be right!)
Answer:
it's a i just took the test
YAY :D
Explanation:
Answer:
A
Explanation:
Took test got it right
Identify the combustion reaction.
a) Al 2S 3 — 2A1 + 35
b) 2H 2 + O2 – 2H 20
c) C12 + 2KBr — 2KCI + Br2
d) C4H 12 + 70 2 - 6H 20 + 4CO 2
Answer:
D) C4H 12 + 70 2 - 6H 20 + 4CO 2
Explanation:
I'm certain this is a combustion reaction.
help needed ASAP plz
Answer:
6 cucumberslices.
Explanation:
You can make a maximum of 4 sandwiches. 8 slices of tomato and 2 needed for each. 8/4=2. You need 4 slices of cucumber per sandwich and have 22. the maximum of sandwiches we can make is 4 so 4×4=16. 22-16=6 leftover slices of cucumber.
How many atoms of each element are present in the nucleotide adenine:C9H14N3O8P
Answer:
not sure but i think that there are 35 atoms.
Have a great day!
An old (pre-1987) penny is nearly pure copper. If such a penny has a mass of 3.3 g, how many moles of copper atoms would be on one penny?
Answer:
Approximately 3.1 × 10²².
Explanation:
Start by considering: how many moles of copper atoms in this 3.3-gram coin?
To answer that, it would be necessary to know the mass of one mole of copper atoms. The mass (in grams) of one mole of copper atoms is numerically equal to the relative atomic mass of copper. Look up the relative atomic mass of copper on a modern periodic table.
Cu: 63.546.In other words, the mass of one mole of copper atoms is equal to 63.546 grams. Hence, the number of moles of copper atoms in the 3.3-gram coin would be equal to
[tex]\displaystyle n = \frac{m}{M} = \frac{3.3}{63.546} \approx 0.0519309 \; \rm mol[/tex].
How many copper atoms would that be? Avogadro's Constant gives the number of particles in one mole.
[tex]N_A \approx 6.023\times 10^{23}\; \rm mol^{-1}[/tex].
Since there are approximately [tex]0.0519309 \; \rm mol[/tex] copper atoms, the number of copper atoms would be
[tex]\displaystyle N = \frac{n}{N_A} \approx \frac{0.0519309}{6.023\times 10^{23}} \approx 3.3 \times 10^{22}[/tex].
The number of moles of copper in a penny of mass 3.3g is about 0.052 moles. By multiplying by Avogadro's number, we find that there are approximately 3.1 × 10²² copper atoms in the penny.
Explanation:To determine the number of moles of copper in a single penny, you need to know the atomic weight of copper and Avogadro's number. The atomic weight of copper is approximately 63.5 g/mol. So, given that the mass of the penny is 3.3 g, we can use the following conversion to find the number of moles:
moles of copper = mass of copper / atomic weight of copper
moles of copper = 3.3 g / 63.5 g/mol = 0.052 moles.
To find the number of copper atoms, you would multiply the number of moles by Avogadro's number (6.022 × 10²³ atoms/mol), thus:
number of copper atoms = number of moles * Avogadro's number
number of copper atoms = 0.052 moles * 6.022 × 10²³ atoms/mol ≈ 3.1 × 10²² copper atoms.
Learn more about Moles of Copper here:https://brainly.com/question/32866556
#SPJ11
Carole owns a two story house with a heating and cooling unit on each floor. In the winter she mostly uses the downstairs unit because the volume of warm air __________ and __________ warming the whole house through __________.
A) expands, rises, convection
B) expands, sinks, conduction
C) contracts, rises, conversion
D) contracts, sinks, contraption
will make brainliest if answer correctly.
Why would you expect strontium to be chemically more similar to calcium?
They are in the same family/group.
They are in the same period.
They have the same atomic number.
They have the same atomic mass.
Answer:
They are in the same family/group.
Explanation:
Both Ca and Sr are Group 2 elements, so can be expected to have similar chemical properties. Strontium would be expected to be chemically similar to calcium because they are in the same family/group.
What is the formula for “ammonium sulfite”
Answer:
(NH₄)₂SO₃
Explanation:
Data Given:
formula for "ammonium sulfite”
Solution
Ammonium sulfite consist of following atoms
Nitrogen = N
Hydrogen = H
Sulfur = S
Oxygen = O
Now we will look for the symbols of ammonium and sulfite
Ammonium = NH₄⁺
ammonium consists one nitrogen and 4 hydrogen atoms. it have overall 1 positive charge.
Sulfite = SO₃²⁻
it have one sulfur and 2 oxygen atoms. the overall charge is 2-.
Now we will write Both ammonium and sulfite ions together. the charges will are the combining power and will be written at the base of the alternate position formula unit.
(NH₄)₂SO₃
So 2 ammonium ions combine with one sulfite ion.
So the formula for “ammonium sulfite” is (NH₄)₂SO₃
The formula of compound that shows the types and numbers of atoms present in a molecule of the compound ammonium sulfite is (NH₄)₂SO₃.
The formula of a compound is a chemical shorthand that provides information about the composition of the compound. The formula typically consists of the atomic symbols of the elements present in the compound, along with subscript numbers indicating the number of atoms of each element.
For example, the formula of water is H₂O, which indicates that it contains two hydrogen (H) atoms and one oxygen (O) atom. Similarly, the formula of sodium chloride is NaCl, representing one sodium (Na) atom and one chlorine (Cl) atom.
The formula of a compound is essential for understanding its chemical properties, stoichiometry, and reactions. It provides a concise way to represent the arrangement of atoms in a molecule and allows scientists to communicate and work with compounds more efficiently.
Learn more about Formula of compound, here:
https://brainly.com/question/32900415
#SPJ6
orbital diagram for lead
Answer:
Orbital diagram attached
Explanation:
Lead has an atomic number 82. Which means that it has 82 protons in its nucleus. As we that in a neutral element number of protons are equal to number of electrons. Which that it has also 82 electrons.
Electronic configuration of lead is:
1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²4f¹⁴5d¹⁰6p²
OR [Xe] 6s²4f¹⁴5d¹⁰6p²
What do scientists generally do if they are NOT sure what the expected value of a measurement should be? A. use their best estimate for the true value B. stop the experiment and measure something else C. take the expected value from a different experiment D. decide not to measure the accuracy of the experiment
Answer: A
Explanation: Use their best estimate for the true value
When a person uses a iron to remove wrinkles from a shirt. Why does heat travel from iron to the shirt
Answer: it transfers through conduction, the molecules of the iron are bumping into the molecules of the shirt, giving them energy.
Explanation: conduction is Energy transferred by touching.
Please help me! And if can explain me the work I would really appreciate it! Thank you!! ❤️
Answer: The answer is D
Explanation:
So there is 2K + 2H2O --> 2KOH + 1H2
2Potassium + 2Water ---> 2Potassium Hydroxide + 1Dihyrogen