ion-ion, is the dominant intermolecular force that determines the solubility of the amine hydrochloride salt of ethyl 4-aminobenzoate in water.
What is hydrochloride ?It is standard practice to transform amines into their hydrochlorides in order to increase their water solubility, which might be advantageous for compounds used in pharmaceuticals. More than 200 hydrochlorides are listed as active components in pharmaceuticals in the European Pharmacopoeia. In comparison to free bases, these hydrochlorides might dissolve more easily in the digestive system and be absorbed into the bloodstream faster. Furthermore, many amine hydrochlorides have a longer shelf life than their corresponding free bases.
Amine hydrochlorides are latent forms of a free base, which is more reactive. In this sense, protection is granted by the production of an amine hydrochloride. The hydrochlorides of the amino acids serve as an example of this phenomenon. Shelf-stable glycine methyl ester hydrochloride is easily transformed into reactive glycine methyl ester, a substance.
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Which of the following is a chemical property of a fossil fuel?
A. ability to burn
B. dark color
C. phase of matter
D. density
A student places two charged objects near each other. The objects repel each other. The student concludes that the objects must both be negative. Do you agree ? Explain.
When student places two charged objects near each other. The objects repel each other. The student concludes that the objects must both be negative .
YES, the conclusion is accurate according to rule like charges repel each other for example negative to negative, positive to positive and unlike charges attracts each other for example negative to positive or positive to negative.
It is governed by Coulomb's law how two sets of charges interact. According to the law, two charges held apart will attract or repel one another with a force equal to their product and the square of the distance between them. While items with differing charges attract one another, those with the same charge repel one another.
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Through how many volts of potential difference must an electron, initially at rest, be accelerated to achieve a wavelength of 0.29 nm ?
The energy supplied to the charge carriers in a circuit exists measured by the potential difference (or voltage) of a supply.
What is meant by potential difference?The difference in electric potential between two points, which is defined as the work required per unit of charge to move a test charge between the two points, is referred to as voltage, electric potential difference, electric pressure, or electric tension. The energy given to the charge carriers in a circuit is calculated using the potential difference (also known as voltage) of a supply. The potential difference is the difference between a point's higher potential and lower potential, whereas the voltage is the amount of energy needed to transfer a unit charge between two locations.m = mass of electron = 9.1 x 10⁻³¹ kg
λ = wavelength of electron = 0.29 x 10⁻⁹ m
v = speed of electron
Using de-Broglie's hypothesis
λ m v = h
(0.29x 10⁻⁹) (9.1 x 10⁻³¹) v = 6.63 x 10⁻³⁴
v = 2.9 x 10⁶ m/s
ΔV = Potential difference through which electron is accelerated
q = charge on electron = 1.6 x 10⁻¹⁹ C
Using conservation of energy
(0.5) m v² = q ΔV
(0.5) (9.1 x 10⁻³¹) (2.9x 10⁶) ² = (1.6 x 10⁻¹⁹) ΔV
ΔV = 20.7 volts
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At what ph are the anion and zwitterion species of equal concentration for an amino acid having no ionizable group in the side chain?
The particular pH at which a given amino acid exists in solution as a zwitterion is called the isoelectric point (pI).
The structure of an amino acid allows it to act as both an acid and a base. An amino acid has this ability because at a certain pH value (different for each amino acid) nearly all the amino acid molecules exist as zwitterions.
If acid is added to a solution containing the zwitterion, the carboxylate group captures a hydrogen (H+) ion, and the amino acid becomes positively charged. If base is added, ion removal of the H+ ion from the amino group of the zwitterion produces a negatively charged amino acid.
Amino acids undergo reactions characteristic of carboxylic acids and amines. The reactivity of these functional groups is particularly important in linking amino acids together to form peptides and proteins, as you will see later in this chapter. Simple chemical tests that are used to detect amino acids take advantage of the reactivity of these functional groups.
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Which molecule would you expect to be least reactive in nucleophilic acyl substitution?
Carboxylate groups are the least reactive towards nucleophilic acyl substitution among carboxylic acid derivatives, followed by amides, (protonated) carboxylic acids, thioesters, esters and finally acyl phosphates, that are most reactive among biologically relevant acyl groups.
Before delving into the details of nucleophilic acyl substitutions, it is critical to understand the relative reactivity of carboxylic acid derivatives. In general, the carbonyl carbon in an acyl group is less electrophilic than the carbonyl carbon in an aldehyde or ketone. This is because the partial positive charge on the carbon in carboxylic acid derivatives is somewhat stabilized by resonance effects from the adjacent heteroatom.
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A 10-g sample of aluminum has a volume of 3.70 cm3. what is the density of aluminum?
Density = mass/volume
ρ = [tex]m/v[/tex]
Density = 10/3.70
Density of aluminum 2.702 g/cm3.
What is aluminum ?A thin, silvery-white metal, aluminum is. It is soft and pliable. Aluminum is used in a wide variety of products, including cans, foil, kitchenware, window frames, beer kegs, and parts for airplanes.
In the Earth's crust, aluminum is the most prevalent metal and the third most abundant element. On Earth, it is typically found in substances and minerals such feldspar, beryl, cryolite, and turquoise. But mining minerals for aluminum is quite expensive.
Rust doesn't occur in aluminum. It's important to remember, though, that aluminum is a highly reactive metal in its purest form. Although pure aluminum technically dissolves when it comes into contact with water, its reactivity may also be its greatest strength.
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A student mixes 50.0 ml of 0.15 m na2co3 and 50.0 ml of 0.15 m cacl2 and collects 0.71 g of dried caco3. calculate the theoretical yield caco3.
The theoretical yield CaCO₃ is 0.75 grams.
The balanced chemical equation for the reaction:
Na₂CO₃ + CaCl₂ → 2NaCl + CaCO₃
NaCl is sodium chloride or common salt
Na₂CO₃ is sodium carbonate or washing soda
CaCO₃ is calcium carbonate or limestone
From balanced chemical equation: n(Na₂CO₃) = n(CaCl₂) = n(CaCO₃)
n(CaCO₃) = 0.05 l × 0.15 mol/l
n(CaCO₃) = 0.0075 mol
m(CaCO₃) = 0.0075 mol × 100 g/mol
m(CaCO₃) = 0.75 g; the theoretical yield
Theoretical yield is the maximum amount of product that can be produced from limiting reactant and actual yield is a product that is obtained by experimentation.
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what is the subatomic particles for oxygen
Answer:
ProtonNeutronElectron
Kamal's science class has just finished a lesson where they
learned the similarities and differences of solids, liquids, and
gases. The next day, Kamal's science teacher displayed four
types of substances. Which substance does not have a definite
shape, color, or texture?
a air
b milk
C grass
d metal
I think it's A. air, because that's the one that will never have a confirmed shape because air can be trapped in jars, bags, closed spaces, and our body til we breathe it out.
snow melts after a snowstorm because of the additon of
How is nitrogen gas separated from air?
When developing prints, _________________________ light doesn’t affect the picture.
When developing prints, Red light doesn’t affect the picture.
The only film you may use is a red light whilst developing it's a far orthochromatic black & white movie which isn't always touchy to crimson mild red seems black in the photographs. photograph resolution is often given in PPI pixels according to the inch. It was how many pixels are displayed in keeping with the inch inside the image. photo decision is a factor that determines picture satisfaction. but the camera sensor processor and even the great lens you're the use of also play an element.
Lighting is a key component in creating a hit picture. lighting fixtures determine now not the handiest brightness and darkness but additionally tone temper and environment. therefore, it's far important to control and control mild efficiently on the way to get the first-rate texture, vibrancy of color, and luminosity in your topics. A safelight is a light source suitable for use in a photographic darkroom. It provides illumination most effective from parts of the visible spectrum to which the photographic cloth in use is almost or absolutely insensitive.
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Classify the following reactions as synthesis, decomposition, single replacement or double
replacement.
1. KCIO,
2. HCI + NaOH -
3. Mg + 2HCI
4. H₂ + O₂
5.
6.
Al + NiBr₂
KCI + O₂
Al + 30₂
4
1
NaCl + H₂O
MgCl₂ + H₂
H₂O
AlBr, + 3NI
Al₂O,
systhesis
decomposition
systhesis
decomposition
Move faster with Chro
systhesis
decomposition
systhesis
decomposition
systhesis
decomposition
systhesis
decomposition
ace
single replacement
double replacement
single replacement
double replacement
single replacement
double replacement
single replacement
double replacement
single replacement
double replacement
single replacement
double replacement
We can classify the given reaction as Synthesis Reactions are : Ni + Cl₂ → NiCl₂, C₃H₆ + Br₂ → C₃H₆Br₂. Decompositions Reactions are : CaCO₃ → CaO + CO₂,2NaCl → 2Na + Cl₂, 2HI → H₂ + I₂. Single Displacement Reactions are : 2Fe + 6HCl → 2FeCl₃ + 3H₂. Double Displacement Reactions are : CaCO₃ +2HCl → CaCl₂ +H₂CO₃
What is Synthesis Reactions?In this type of reaction , two or more chemical components combine in order to form a complex product which is given as:
A + B → AB
What is Decomposition Reaction?A kind of chemical reaction which only one type of reactant results to produce of two or more than two products.
What is Single Displacement reaction?A single displacement reaction which has an another name as single replacement reaction is a type of oxidation-reduction chemical reaction in which an ion or element moves out of compound.
What is Double Displacement Reactions ?A double displacement reaction is a type of chemical reaction which tells that the reactant ions exchange its's places in order to form new products.
Thus, From the above Conclusion we can say that,
Synthesis Reactions are : Ni + Cl₂ → NiCl₂
C₃H₆ + Br₂ → C₃H₆Br₂
Decompositions Reactions are : CaCO₃ → CaO + CO₂
2NaCl → 2Na + Cl₂
2HI → H₂ + I₂
Single Displacement Reactions are : 2Fe + 6HCl → 2FeCl₃ + 3H₂
Double Displacement Reactions are : CaCO₃ +2HCl → CaCl₂ +H₂CO₃
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Note: The question is incomplete in the portal. Here is the complete question.
Question: Classify the following reactions as synthesis, decomposition, single replacement or double replacement.
Ni + Cl₂ → NiCl₂C₃H₆ + Br₂ → C₃H₆Br₂ CaCO₃ → CaO + CO₂ 2NaCl → 2Na + Cl₂2HI → H₂ + I₂2Fe + 6HCl → 2FeCl₃ + 3H₂CaCO₃ +2HCl → CaCl₂ +H₂CO₃1. Ancient atomic models described the atom as a solid sphere with no charge. In the 1800s and 1900s, scientists discovered subatomic particles with charges inside the atom.
Which statement most likely explains why the early models did not include the subatomic particles?
A statement which most likely explains why the early atomic models did not include the subatomic particles is that: D. subatomic particles could not be detected with the technology available.
The three subatomic particles.Generally, an atom comprises three (3) distinct subatomic particles and these include the following
Protons.Neutrons.Electrons.The experiment on atoms.Ernest Rutherford performed a set of experiments on atoms in 1910 which has helped several scientists and researchers to better understand the structure of atoms by using gold foil.
In his experiment on structure of atoms, Rutherford directed a beam of small, positively charged particles referred to as alpha () particles at a very thin sheet of gold foil.
However, the early atomic models did not include the subatomic particles is that they could not be detected with the technology available at the time.
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Complete Question:
Ancient atomic models described the atom as a solid sphere with no charge. In the 1800's and 1900's, scientist discovered subatomic particles with charges inside the atoms.
Which statement most likely explains why the early models did not include the subatomic particles?
answer choices
atoms changed over time to develop the subatomic particles
not all atoms contain subatomic particles
subatomic particles move and cannot be counted
subatomic particles could not be detected with the technology available.
How much water would you add to 10 ml of a 1.0 m salt solution to change its concentration to 0.001 m?
1000 times dilution of 1.0M salt solution needs to be done to obtain a solution with 0.001M concentration.
Dilution is the method of reducing a solute's concentration in a solution. It generally only involves mixing the solution with extra solvent, such as water.
Serial dilution is the best option to obtain 0.001M concentration from a stock solution of 1.0M salt solution.
1ml 1.0M solution + 9ml water = 0.1M concentration (10 times dilution)
1ml 0.1M solution + 9ml water = 0.01M concentration (100 times dilution)
1ml 0.01M solution + 9ml water = 0.001M concentration (1000 times dilution)
This method of dilution also saves water, time and energy.
OR
To 10ml of 1.0M salt solution, 990ml of water should be added to obtain a solution of 0.001M concentration.
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2. 0 moles of a monatomic ideal gas undergoes an isobaric process in which the temperature changes from 260 k to 320 k. What is the work done on or by the gas?
Тhe work done by the gas is -1.0×10^3 J.
The work of an ideal gas is directly proportional to the temperature of the gas:
W = n × R × ΔT
ΔT = 320 K - 260 K
ΔT = 60 K; change of the temperature
n = 2.0 mol: amount of a monatomic ideal gas
R = 8.314 J/mol×K;the ideal gas constant
W = 2 mol × 8.314 J/mol×K × 60 K
W = 1000 J
W = -1.0×10^3 J; the work of the gas
Isobaric process is a type of process in which the pressure of the system stays constant.
Charles' Law: The Temperature-Volume Law - the volume of a given amount of gas held at constant pressure is directly proportional to the Kelvin temperature
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Help ASAP! Brainliest for best answer!
The length of a bond, between two atoms, is the distance between the two nuclei of the atoms that is the point of ________.
Covalent inclusion
Maximum Energy
Minimum Energy
Nuclear fission
A+volumetric+flask+contains+25.0+ml+of+a+14%+m/v+sugar+solution.+if+2.5+ml+of+this+solution+is+added+to+22.5+ml+of+distilled+water,+what+is+the+%+m/v+of+the+new+solution?
The concentration of the new solution, obtained by adding 22.5 mL of distilled water to 2.5 mL of 14 % m/V sugar solution, is 1.4% m/V.
What is distilled water?The terms ACID (atomicity, consistency, isolation, and durability) refer to a set of characteristics of database transactions that are meant to ensure data validity despite errors, power outages, and other unforeseen circumstances.
A transaction is a series of database activities that adhere to the ACID principles and can be thought of as one logical operation on the data in the context of databases. For instance, a transfer of money between bank accounts, even when it involves many adjustments like debiting one account and crediting another, is only one transaction.
Building on previous work by Jim Gray, who identified atomicity, consistency, and durability but not isolation when describing the transaction concept, Andreas Reuter and Theo Härder created the acronym ACID in 1983.
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3) The distance from the Earth to the Moon is 238,900 mi. What is the distance in inches?
The distance from the Earth to the Moon in inches is 18304704000 inches.
What is the distance from the Earth to the Moon?Distance is a measure of the point of separation of two point or the amount of space between two points.
The SI unit for measuring distance is meters with symbol m.
Other common units of measuring distance or length include:
miles with distance miinches with symbol infeet with symbol ftThe distance from the Earth to the Moon is given in miles as 238,900 mi
1 mile = 63360 inches
238900 miles = 238900 * 63360
238900 miles = 18304704000 inches.
Distance = 18304704000 inches.
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An element has 32 protons, 40 neutrons, and 36 electrons. What is the name of the element?
Germanium (Ge) with a charge of -4
Which will be attracted to a negatively charged region of a protein?
a. the o atom in the water molecule
b. a phosphate group
c. the h atom in a c-h bond
d. cl-
e. the h atom in the water molecule
The H atom in the water molecule will be attracted to a negatively charged region of a protein. So, the correct option is (e).
The protons at the center of the quantum atom are a significant source of positive charges and are attracted to all negatively charged electrons.Therefore, in a covalent connection, shared electrons are drawn in the direction of the positively charged protons at the centres of the two atoms.
The number of protons in the centre of each atom, the electrons' energy level and orbital, and the quantity or number of electrons between them and the atomic centre (the amount of "screening" by inner electrons) all affect how strongly the electrons are dragged.
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The efficiency of a machine is 60%. Calculate the work done by a student who used this machine to lift a load of 150 kg through a distance of 2.5cm.
Work done by a student who used the machine to lift a load of 150 kg through a distance of 2.5cm is 61.25 J.
How well a machine converts its input energy into useable output energy, or work, is referred to as efficiency. The portion or percentage of the output divided by the input is a key determinant of a machine's usefulness.The push or pull on a mass-containing item changes its velocity. An external force is an agent that has the power to alter the resting or moving condition of a body. It has a direction and a magnitude.Given,
Efficiency of machine in decimal= 60% = 0.6
Weight of load = 150 Kg
Distance must be in meters = 2.5cm = 0.025m
Using the formula,
Efficiency = work output/ input work
Work done is unknown.
work output = Force × Distance
Force can be calculated = m × g = 150 × 9.8 = 1470 N
work output = 1470 × 0.025 = 36.75 J
Work done = work output / Efficiency
= 36.75 / 0.6
= 61.25 J
Therefore, work done by student to lift that load is 61.25 J.
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How big was the universe after 100 seconds
Answer:
The Universe was once just the radius of the Earth-to-the-Sun, which happened when the Universe was about a trillionth (10-12) of a second old. .
Explanation:
Answer: like 25 0's i think
Explanation:
2
In Lei's experiment, one step of the procedure requires her to bring some water to a boil. Which two pieces of equipment should Lei
use to carry out this step?
OA. a magnet and a petri dish
OB. a hot plate and a beaker
OC. a Bunsen burner and a balance
OD. a magnifying glass and a test tube
Reset
Submit
In Lei's experiment, one step of the procedure requires her to bring some water to a boil. Lei should use OC.a Bunsen burner and a balance.
Because it can operate with a variety of gases, has a single flame, and allows for adjustable heat output, the Bunsen burner is crucial in laboratories. Scientists utilize a variety of beakers in the lab. Scientists mix and track the responses of various compounds within them.
The following are three general safety guidelines when using a Bunsen burner: Never leave the lab with the burner on and never leave open flames unattended. Once the gas has been used up, turn it off. Before handling the burner, allow it to cool. Before leaving the lab, make sure the main gas valve is closed.
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The volume of a single potassium atom is . what is the volume of a potassium atom in microliters?
The volume of a potassium atom in microliters is [tex]$4.15 * 10^{-20} \mu L$[/tex]. Potassium is an element with the chemical symbol K and atomic number 19.
What is potassium atom?K is the chemical symbol for potassium, and 19 is its atomic number. Potassium is an alkali metal that is a solid at normal temperature. K is the chemical symbol for potassium, and 19 is its atomic number. (Which in Neo-Latin means kalium).
Potassium exists as a silvery-white metal that may be cut with a knife quickly and painlessly.[tex]$\mathrm{cm}^3$[/tex]to microliters.
We know that:
[tex]$1 \mathrm{~cm}^3=1 \mathrm{~mL}$[/tex]
[tex]$1 m L=10^{-3} L$[/tex]
and, [tex]$1 L=10^6 \mu L$[/tex]
Let's use these conversions factors for the desired conversion utilising dimensional as:
[tex]$4.15 * 10^{-23} \mathrm{~cm}^3\left(\frac{1 m L}{1 c m^3}\right)\left(\frac{10^{-3} L}{1 m L}\right)\left(\frac{10^6 \mu L}{1 L}\right)$[/tex]
[tex]$=4.15 * 10^{-20} \mu L$[/tex]
So, the answer stands [tex]$4.15 * 10^{-20} \mu L$[/tex]
The complete question exists,
The volume of a single strontium atom exists 4.15×10-23 cm3. What is the volume of a strontium atom in microliters
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What+is+the+w/w+%+of+an+aqueous+solution+of+ammonia+at+14.3+m,+with+a+density+of+0.900+g/ml.
w/w+%+of+an+aqueous+solution+of+ammonia+at+14.3+m,+with+a+density+of+0.900+g/ml.
The molar mass of ammonia is 17g/mol
So, 14.3 mole ammonia = 17×14.3 g = 243.1g
In 1243.3 g solution, ammonia is present = 243.3g
So, in 100 g solution, ammonia is present
= (243.3/1243.3) × 100 g
= 19.57 g
Ammonia here is 19.56% w/w.
What is w/w?
The concentration of a solution can be expressed in a variety of ways. They only differ in terms of the units they utilise, but they consistently express the solute concentration in a specific volume of solution. The solution contains 0.3% (w/w) PCMX, according to the label on the right, where (w/w) stands for weight per weight.
(w/w) The relative amount of solute and solvent present in a solution is indicated by its concentration. The proportion of solute to solvent in a concentrated solution is high.
The concentration of the solution is 14.3 m
So, we can say in 1 kg of solvent (water) , 14.3 mole solute ( ammonia ) is present.
The molar mass of ammonia is 17g/mol
So, 14.3 mole ammonia = 17×14.3 g = 243.1g
In 1243.3 g solution, ammonia is present = 243.3g
So, in 100 g solution, ammonia is present
= (243.3/1243.3) × 100 g
= 19.57 g
So, here , Ammonia 19.56% w/w.
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What are the coefficients in front of no3-(aq) and zn(s) when the following equation is balanced in a basic solution?
The Balanced equation is:
[tex]NO_3^- (aq) + 2Zn (s) \rightarrow Zn^2^+ (aq) + 3NO (g)[/tex]
A balanced equation is a chemical reaction in which the overall charge and the number of atoms for each component are exactly equal for both the products and the reactants. In simple words, the mass and charge of each side of the reaction process are equal.
One may balance equations by adhering to some basic guidelines:
1. Verify that all of the equation's formulas are accurate.
2. Focus on just one component at a time.
3. Balancing requires big number addition. A chemical formula cannot have any little numbers changed. If there has to be any balance, place the number before the substance.
4. Recheck each component and repeat step 3 if necessary.
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Question 6 of 20:
Select the best answer for the question.
6. Which of the following accurately pairs the part of an atom to its charge?
A. Proton-no charge
B. Neutron-positive charge
C. Electron-no charge
D. Electron-negative charge
Mark for review (Will be highlighted on the review page)
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Answer:
D
Explanation:
elections are negatively charged
Valerie and Greg want to bake a cake. They mix the cake batter and preheat the oven. Once the oven reaches the right temperature, they pour the batter in a cake pan, put it in the oven, and close the door. They know that while the cake is in the oven, a chemical change that involves energy occurs. Which of these statements describes the amount of energy in the oven while the cake is baking?
A. The total amount of energy will either increase or decrease, depending on how much cake batter there is.
B. The total amount of energy increases because the oven gets very hot.
C. The total amount of energy decreases because it changes into matter.
D. The total amount of energy stays the same, but it changes from one form to another.
Answer: D
Explanation: Energy cannot be created or destroyed
I NEED HELP NOW PLEASE
One calcium atom (Ca+2) will combine with which of the following atoms in a one-to-one ratio?
Select one:
a. Be+2
b. O-2
c. Cl-
d. Na+
The atom that would combine in a one-to-one ratio with calcium is oxygen.
How does atoms combine?According to the Dalton's atomic theory, atoms combine in simple ratios to one another. As such, we can see that compounds are formed by the combination of atoms in a given ratio.
Now, the calcium atom which is divalent can only combine with a divalent atom in a one to one ratio. Since calcium is positively charged, this ion must be negatively charged to form an ionic bond.
Hence, the atom that would combine in a one-to-one ratio with calcium is oxygen.
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