Answer:
-Sulfur is a chemical element with the symbol S and atomic number 16. It is abundant, multivalent and nonmetallic. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S₈. Elemental sulfur is a bright yellow, crystalline solid at room temperature.
(Atomic number: 16
Electron configuration: [Ne] 3s²3p⁴
Electrons per shell: 2,8,6
Electronegativity: 2.58)
-Calcium is the 20th element, with 20 protons. Since a stable atom has a net charge of 0, we must have 20 electrons.
-Carbon is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes up only about 0.025 percent of Earth's crust.
(Symbol: C
Atomic mass: 12.0107 u
Atomic number: 6
Electrons per shell: 2, 4
Electron configuration: [He] 2s22p2
Electronegativity: 2.55)
According to the electronic configuration, number of valence electrons in each atom of calcium,carbon and sulfur is 2, 4 and 6 respectively.
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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What are water and carbon dioxide converted into by the end of
photosynthesis? *
air and sunlight
water and air
sugar and water
sugar and oxygen
Answer:In photosynthesis, solar energy is harvested as chemical energy in a process that converts water and carbon dioxide to glucose. ... In cellular respiration, oxygen is used to break down glucose, releasing chemical energy and heat in the process. Carbon dioxide and water are products of this reaction.
Explanation:
2Na(s) + Cl2(g) → 2NaCl(s)
Which of the following choices shows the correct Lewis electron-dot diagram for a molecule of chlorine, Cl2?
Answer: 2!
Explanation:
The best lewis structure for [tex]Cl_2[/tex] is in option 2.
Na or sodium is the cation in the reactant.
Cl or chlorine is the anion in the reactant side.
NaCl is the product of the reaction.
Lewis Structure is a very simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule. Electrons are shown as "dots" or for bonding electrons as a line between the two atoms.
Chlorine is a group VIIA element in the periodic table and contains seven electrons in its last shell.
Valence electrons are given by chlorine atoms = [tex]7\times2=14[/tex]
Total valence electrons = 14
So, each of Cl is surrounded by three pairs of dots, connected by a single line. So, the best lewis structure for [tex]Cl_2[/tex] is in option 2.
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Riddle
Why did the rock collector like his
collection of metamorphic rocks so much?
Answer:
Because they would keep changing? Or Because they were the hottest?
what's the difference between viscosity and flow rate
Answer:
Flow rate is how fast a fluid moves. The flow rate can depend on several factors. These factors are the type of fluid that you are using, the force that is pushing on a fluid, the size of the pipe the fluid flows from and the type of surface the fluid flows over. Viscosity is the resistance of a fluid to flow.
Explanation:
just looked it up
what type of lens is shown -covex lens
-this isnt a lens
concave lens
[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the Concept of the Lens and Ray Optics.
We must understand the Concept that,
1.) When a beam of parallel light pass through a Convex lens, all the rays get deviated and converges to a special point at the axis that is a Focus.
2.) When a beam of light passes through the Concave lens,the light beams diverge from one another forming a virtual focus in the primary side of lens,
Hence the above given diagram beam rays are diverging, it is a CONCAVE LENS
answer is C.) Concave lens
What is the most common oxidation number for group 3 on the periodic table?
Answer:
español
Un elemento del grupo 3 es un elemento situado dentro de la tabla periódica en el grupo 3. Los átomos de estos elementos tienen gran tendencia a oxidarse y son muy reactivos, predominando el estado de oxidación +3. Presentan propiedades muy similares al aluminio. Dan lugar a iones incoloros.
ingles
An element of group 3 is an element located within the periodic table in group 3. The atoms of these elements have a great tendency to oxidize and are very reactive, with the +3 oxidation state predominant. They have properties very similar to aluminum. They give rise to colorless ions.
Explanation:
ingles
Group -> 3
Group -> 3Period
Group -> 3Period4 21
Group -> 3Period4 21Sc
Group -> 3Period4 21Sc5 39
Group -> 3Period4 21Sc5 39Y
Group -> 3Period4 21Sc5 39Y6 57
Group -> 3Period4 21Sc5 39Y6 57The
Group -> 3Period4 21Sc5 39Y6 57The7 89
Group -> 3Period4 21Sc5 39Y6 57The7 89Ac
español
Grupo -> 3
Grupo -> 3Periodo
Grupo -> 3Periodo4 21
Grupo -> 3Periodo4 21Sc
Grupo -> 3Periodo4 21Sc5 39
Grupo -> 3Periodo4 21Sc5 39Y
Grupo -> 3Periodo4 21Sc5 39Y6 57
Grupo -> 3Periodo4 21Sc5 39Y6 57La
Grupo -> 3Periodo4 21Sc5 39Y6 57La7 89
Grupo -> 3Periodo4 21Sc5 39Y6 57La7 89Ac
Molar Concentration of H2O+ lons
in Four Solutions
Solution Molar Concentration
of H3O+ lon
(M)
A 0.1
B 0.01
с 0.001
D I’m 0.0001
Which solution has the highest pH?
Answer:
d
Explanation:
because it’s moving the most spots to the left
The acidity or alkalinity of a solution depends upon its hydronium ion concentration and hydroxide ion concentration. Here among the given solutions, the solution D has the highest pH. The correct option is D.
What is pH?The pH of a solution is defined as the negative logarithm to the base 10 of the value of the hydronium ion concentration in moles per litre. The pH scale is introduced by the scientist Sorensen. It is more easy to express the concentration of H₃O⁺ using this method.
The equation used to calculate the pH of the solution is given as:
pH = -log[H₃O⁺]
For 0.1 M
pH = -log[0.1] = 1
For 0.01 M
pH = -log[0.01] = 2
For 0.001 M
pH = -log[0.001] = 3
For 0.0001 M
pH = -log[0.0001] = 4
So solution D has the highest pH which is 4.
Thus the correct option is D.
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when combined the two substances together in the cup, the product can be described as a ____ or ____ (there are two possible answers . you just need to choose one )
1. white gas
2. white liquid
3. white solid
The following dot plot represents the litter sizes of a random sample of labrador retrievers.
Calculate the mean, median, and mode for this set of data.
Calculate the range, interquartile range, and mean absolute deviation (rounded to the nearest hundredth) for this set of data. For the mean absolute deviation, do not round the mean.
Make two inferences about the litter size of labrador retrievers.
Answer:
12
Explanation:so the mean deviation is for the square and the square is for you so you keep the square and add it.
Answer:
1. mean: 7.78 median: 8 mode: 7
2. range: 9 interquartile range: 2 MAD: 4.5367
3. The range is about 4 times bigger than the interquartile range. The mean is around double the MAD.
Explanation:
Select the correct answer.
Copper carbonate (CuCO3) reacts with hydrochloric acid (HCl) according to this equation:
CuCO3(s) + 2HCl(aq) → CuCl2(aq) + H2O(l) + CO2(g).
Which statement correctly describes the substances in this reaction?
A.
Exactly one product and two reactants are either liquid or dissolved in water.
B.
Exactly one of the reactants is in a water-based solution, but none of the products are.
C.
The reactants include both a liquid and a gas.
D.
Exactly one reactant is a solid, and exactly one product is a gas.
E.
The products include a solid, a liquid, and a gas.
Answer:
I think the answer would be option d.
hope it helps.
How much heat does it take to move 45 g of ice at -25°C to water at 31°C?
Deep, cold water has __________. Warm, shallow water has ___________.
low density; low density
high density; high density
low density; high density
high density; low density
Answer:
Deep cold water has a high density and warm, shallow water has a low density.
Explanation:
Because when it is cold, water shrinks together it acts as a factor for it to have a high density and it's deep which also acts as a factor because to deeper something is near the Earth's core the more pressure it has leads to high density as well because gravity is stronger near the Earth's core. When water is warm it has a low density which is the first factor and because it is shallow it is far from the earth's core it has a lower density and pressure.
what mixture is salt and water?
a.solutions
b.colloids
c.suspensions
A chemist determined by measurements that 0.0400 moles of potassium iodide participate in a chemical reaction. Calculate the mass of potassium iodide that participates. Be sure your answer has the correct number of significant digits.
Answer:
#############################
Answer:
j
Explanation:
Which statement describes asexual reproduction but not sexual
reproduction?
A. Offspring are genetically identical to the parent.
B. The process involves cell division by meiosis.
c. Offspring are genetically different from one another.
D. The process involves two parents.
Plz i’ll give brainless plz pick correct
Answer:
A. Offspring are genetically identical to the parent.
That's the answer. I hope it helps!
The statement which describes asexual reproduction but not sexual
reproduction is A. Offspring are genetically identical to the parent.
What is Asexual Reproduction ?Asexual reproduction is a type of reproduction that does not involve the fusion of gametes or change in the number of chromosomes.
The offspring that arise by asexual reproduction from either unicellular or multicellular organisms inherit the full set of genes of their single parent.
An Asexual reproduction means that the parent organism will simply split into two child organisms, and that there will be no mixing of the DNA, as it is the case in case of the sexual reproduction which mixes up the DNA.
Therefore the child and the parent organism will contain exactly the same genetic material - the correct answer is A.
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2. Each type of atom is called an element. Which part of the atom give the
atoms its Identity?
The smallest particle of an element which is indivisible and takes part is chemical reaction as a whole without division is called an atom.
the three fundamental particles that identify the atoms are protons, neutrons and electrons.
Can you divide equation II by another factor and still have it be correct? Why or why not?
Answer:
No. You can not simplify a coefficient of.
Explanation:
:)
Changes in thermal energy provide evidence that a chemical reaction
has occurred. Which of the following BEST describes a chemical reaction
in which energy is released?
Select one:
Exothermic reaction.
Reversible reaction
Physical reaction
Endothermic reaction.
Answer:
Exothermic reaction
Explanation:
Exothermic reaction is a reaction in which energy is evolved from the reaction to the surroundings
balance the following equation FeC²+Cl². FeCl³
Answer:
this equation is not proper see that where is the reactant.
Explanation:
give give a proper question and I will
if fecl2 + c2 gives a fecl3 where does the carbon compound go
Answer:
2FeCl2 + Cl2 → 2FeCl3
Explanation:
What is the temperature in kelvin of a gas if it is allowed to expand from 1.50 L to 4.50 L? The initial temperature is 10.0°C and pressure is constant throughout the change.
Which equation should you use?
StartFraction V subscript 1 over T subscript 1 EndFraction equals StartFraction V subscript 2 over T subscript 2 EndFraction.
T subscript 2 equals StartFraction V subscript 1 over V subscript 2 EndFraction T subscript 1.
T subscript 2 equals StartFraction V subscript 2 over V subscript 1 EndFraction T subscript 1.
Answer:
first question is the third option and the second question is 849K.
Explanation:
Answer:
third option
849K
Explanation:
Sodium bicarbonate is the chemical name for baking soda. Its chemical formula is NaHCO3. What does the subscript 3 mean?
Answer:
'3' in NaHCO₃ is the number of moles oxygen in 1 mole of sodium bicarbonate
Explanation:
see above note.
C.
There Are Three Atoms Of Oxygen In Sodium Bicarbonate.
_______
I Got It Right On The Test, Hope It Helps :)
2 Write a word equation and
a symbol equation for the
reaction of solid zinc oxide
(ZnO) with sulfuric acid.
Answer:
Zinc oxide is react with sulphuric acid to give zinc sulphate and water.
zinc oxide +sulphuric acid ⇒ zinc sulphate + water
Zno +H2So4 ⇒ZnSo4 + H2O
SULPHURIC ACID = H2SO4
ZINC SULPHATE =ZnO
Explanation:
What are the intermediate chemical equations for this reaction
Reaction 1
Reaction 2
Reaction 3
Answer:
REACTION 2
Explanation:
BEACUSE IT SYA IN THE QUESTION
Answer:
Reaction 1: Mg(s) + 2HCl(aq) -> MgCl2(aq) + H2(g)
Reaction 2: MgO(s) + 2HCl(aq) -> MgCl2(aq) + H2O(l)
Reaction 3: H2(g) + ½ O2(g) -> H2O(l)
Explanation:
Help plz pozlzlzksj help
Answer:
increase moles of gas inside
Explanation:
Answer:
Its ( C )- Decrease the temperature of the gas inside the basketball
Explanation:
To make sure the balloon doesn't inflate so much it bursts you should NOT completely inflate the balloons when you know the temperature will increase!
Which of the following diagrams represents a single
replacement reaction?
Explanation:
i think the answer is....b
The diagram that represents single replacement reaction is:
b.
Single replacement reaction:This reaction is also known as displacement reaction. It is a reaction in which one element is substituted for another element in a compound. When a replacement reaction occurs, a new aqueous compound and a different pure element will be generated as products. For example:
[tex]2HCl(aq)+Zn(s)--->ZnCl_2(aq)+H_2(g)[/tex]
Thus, option b is correct.
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A mole of carbon has the same number of atoms as a mole of beryllium.
O True
False
Answer:
False.
Explanation:
Carbon = 12
Beryllium = 9
good luck, i hope this helps :)
Compound X has a molar mass of 104.01·gmol−1 and the following composition: element mass % nitrogen 26.93% fluorine 73.07% Write the molecular formula of X .
Answer: N2F4
Explanation:(NF2)x2 = N2F2
The compound X has a molar mass of 104.01·gmol−1 and the following composition: element mass % nitrogen 26.93% fluorine 73.07%, then the molecular formula of X is N2F4.
What is molecular formula?Molecular formula is defined as a chemical formula that give the total number of atoms of each elements in each molecule of a substance.
It can also be defined as a phrase that specifies the number of atoms of each element in a complex molecule.
It represents the actual number of each atom in a molecules.
It tells us which atoms and how many of each types of atoms are present in a molecule.
NF2 x 2 = N2F4
Thus, the compound X has a molar mass of 104.01·gmol−1 and the following composition: element mass % nitrogen 26.93% fluorine 73.07%, then the molecular formula of X is N2F4.
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the more massive an object is, the more
Answer:
it have more more mass, gravitational potential energy
Explanation:
the atoms in the same period on the periodic table all have what ?
A - The same abbreviation
B - The same number of electron shells
C - the same number of electrons
D - the same number of electrons on the outer energy level
Answer:
B.
Explanation:
A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor.
HCO3− + H2S → H2CO3 + HS−
In the reaction above, what is the Bronsted-Lowry acid?
Answer:
H₂S is the proton donor => Bronsted Acid
Explanation: