Answer:
An ionic bond forms when atoms transfer electrons.
Explanation:
Ionic bonds are formed when atoms transfer electrons. (In contrast, covalent bonds are formed when atoms share electrons.)
There's a distinction between the two: when two atoms react to form an ionic bond, one atom would completely lose one electron, while the other would completely gain that electron. The atom that loses the electron becomes a positively-charged ion called a cation, whereas the atom that gains the electron becomes a negatively-charged ion called an anion.
For example, consider the reaction between a sodium atom and a chlorine atom: .
When the sodium atom and the chlorine atom encounter, the sodium atom would lose one electron to form a positively-charged sodium ion, . The chlorine atom would gain that electron to form a negatively-charged chlorine ion .
These two ions will readily attract each other because of the opposite electrostatic charges on them. This electrostatic attraction (between two ions of opposite charges) is an ionic bond.
Overall, it would appear as if the sodium atom transferred an electron to the chlorine atom to form an ionic bond.
In contrast, when two atoms react to form a covalent bond, they share electrons without giving any away completely. Therefore, it is possible to break certain covalent bonds apart (using a beam of laser, for example) and obtain neutral atoms.
On the other hand, when an ionic bond was broken, the result would be two charged ions- not necessarily two neutral atoms. The electron transfer could not be reversed by simply breaking the bond.
For example, when table salt is melted (at a very high temperature,) the ionic bond between the sodium ions and chloride ions would (mostly) be broken. However, doing so would only generate a mixture of and ions- not sodium and chlorine atoms.
which substance does not have a definite shape, color, or texture?
I believe gases do not have a definite shape, color, or texture.
A solid has definite volume and shape, a liquid has a definite volume but no definite shape, and a gas has neither a definite volume nor shape
So the answer is a gas
How many ml of a 5.0 m solution of sodium borate must be added to a 200 ml solution of 50 mm boric acid in order for the ph to be 9.6?
4.6 ml of a 5.0 M solution of sodium borate must be added to a 200 ml solution of 50 mM boric acid in order for the pH to be 9.6.
Henderson–Hasselbalch equation for buffer solution:
pH = pKa + log(cs/ck)
pH = 9.6; pH of the buffer solution of sodium borate and boric acid
pKa = 9.24
log(cs/ck) = 9.6 - 9.24
log(cs/ck) = 0.36
cs/ck = 2.29; ratio of sodium borate and boric acid
nk = 0.05 M × 0.2 l
nk = 0.01 mol; amount of boric acid
Vs = 200 ml ÷ 100 × 2.29
Vs = 4.6 ml; volume of sodium borate
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Solve the given differential equation by using an appropriate substitution. the de is of the form dy dx = f(ax by c), which is given in (5) of section 2.5. dy dx = (x y 3)2
Solution for the differential equation xdx + (y - 2x)dy = 0 is x/(y(x) - 1) + log((y(x) - x)/x) c1 - log(x)
What is differential equation?A differential equation in mathematics is an equation that connects the derivatives of one or more unknown functions. Applications often involve functions that reflect physical quantities, derivatives that depict the rates at which those values change, and a differential equation that establishes a connection between the three.
One or more terms as well as the derivatives of the dependent variable in respect to the independent variable make up a differential equation (i.e., independent variable) dydx. = f (x) The independent variable in this case is "x," while the dependent variable is "y." For instance, dydx.
A function y=f(x) that satisfies the differential equation when f and its derivatives are replaced into the equation is a solution to a differential equation.
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What is the mass of an object that requires a force of 25 N to accelerate at 5 m/s/s?
An object with a mass of 5 kg requires a force of 25 N to accelerate at 5 m/s/s.
Force is described as the amount of energy need to move an object, either push or pull. For an object of constant mass, force is equal to the product when you multiply mass and its acceleration.
F = ma
where F = force (N or kg m/s^2)
m = mass (kg)
a = acceleration (m/s^2)
If an object requires a force of 25 N (= 25 kg m/s^2) to accelerate at 5 m/s/s, the using the formula F = ma, solve for its mass.
F = ma
25 N = 5 m/s/s (m)
25 kg m/s^2 = 5 m/s/s (m)
25 = 5m
m = 5 kg
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When comparing 2 hydrocarbons, why would the larger, higher molecular weight molecule have a higher melting point?
When comparing two hydrocarbons, the larger, higher molecular weight molecule would have a higher melting point due to greater amounts of dispersion forces.
What are hydrocarbons?Hydrocarbons are organic compounds made up of only carbon and hydrogen. They are non-polar molecules; therefore, they do not have partial charges or hydrogen bonds. The only form of intermolecular attraction between them are dispersion forces.
What are dispersion forces?Dispersion forces are the weakest type of intermolecular forces. They exist in non-polar molecules and gases like neon, hydrogen gas and oxygen gas. It is formed by the attraction between electrons and the nucleus.
Hydrocarbons with higher molecular weights have more electrons surface area than hydrocarbons with lower molecular weights. This causes the dispersion forces between the molecules to increase, thereby causing an increase in boiling point.
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Which one of the following substances would be the most soluble in cyclohexane, c6h12? nano3 ch3ch2oh c5h12 hi nh3
The solvent that is most soluble in it will be nonpolar C4H10.
What is nonpolar?In chemistry, polarity is the separation of electric charge, which causes a molecule or its chemical groups to have an electric dipole moment, with a negatively charged end and a positively charged end.
Due to a difference in electronegativity between the bound atoms, polar molecules must have one or more polar bonds. If the bond dipoles cancel each other out through symmetry, molecules with polar bonds have no molecular polarity.
Dipole-dipole intermolecular forces and hydrogen bonding are two ways that polar molecules communicate with one another. Surface tension, solubility, melting and boiling points, as well as other physical characteristics, are all governed by polarity.
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The density of a solid is 2.88 g/cm³. The dimensions are 3.2 cm by 1.8 cm by 3.0 cm. What is the mass of the solid?
Answer:
49.7664g
Explanation:
First, we define the formula for the density of a matter.
Density = Mass ÷ Volume
Rearranging the formula, to find mass, we have:
Mass = Density × Volume = 2.88 × (3.2 × 1.8 × 3) = 49.7664g
Take note of all the units,ensure all matches, otherwise, you might have to do some conversions.
when stored energy burns what is it converted/transformed to
Answer:
The energy changes into heat and light energy.
Explanation:
pls mark brainliest
If+a+250-ml+solution+of+ethanol+in+water+is+prepared+with+4+ml+of+absolute+ethanol,+what+will+be+the+concentration+of+ethanol+in+%+v+/v?
% v/v = (volume of ethanol/total volume) x 100%
% v/v = 4 ml/250 ml x 100 % 1.6 % (v/v) ethanol 98.4% water 1.6% ethanol
Mixtures of ethanol and water are not ideal (i.e. have linear properties) so you cannot mix 4 mL of ethanol with 246 mL of water to get a 250 mL mixture and precious 100 But also 250ml contains the same amount of ethanol as the previous 4ml. But the volume is 250/4 = 62.5 times larger. This is therefore the dilution factor by volume.
The concentration of a substance is the amount of solute present in a given volume of solution. Concentration is usually expressed in molarity, defined as the number of moles of solute in 1 L of solution.
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A combustion device was used to determine the empirical formula of a compound containing only carbon hydrogen and oxygen. A 2.62 g sample of unknown produced 2.45 g carbon dioxide and 1.50 g water. What is the empirical formula of a compound
The empirical formula of the compound is C₂H₃O₄.
Mass of composition of the atoms in the compound
mass of carbon in the carbon dioxide, C = (12 x 2.45)/44 = 0.668 g
note molar mass of carbon dioxide = 44 g/mol
mass of hydrogen in the water, H = (1 x 1.5)/18 = 0.083 g
note molar mass of water = 18 g/mol
mass of oxygen, O = 2.62 g - (0.668g + 0.083 g) = 1.869 g
Molar composition of the atomsC = 0.668 g / 12 = 0.056 mole
H = 0.083 g/ 1 = 0.083 mole
O = 1.869 g/16 = 0.1168 mole
Divide through by the smallest number of mole
C = 0.056/0.056 = 1
H = 0.083/0.056 = 1.5
O = 0.1168/0.056 = 2
C = 1 x 2 = 2
H = 1.5 x 2 = 3
O = 2 x 2 = 4
C₂H₃O₄
Thus, the empirical formula of the compound is C₂H₃O₄.
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When water dissolves a substance, weak charges on water molecules attract oppositely charged portions of the substance, pulling them out into solution. Which property of water accounts for this occurrence?.
When water dissolves a substance, weak charges on water molecules attract oppositely charged portions of the substance, pulling them out into solution. The property of water that accounts for this occurrence is the polarity of water.
The water molecule is made up of one oxygen atom and two hydrogen atoms. The three atoms are arranged in such a way that the hydrogen atoms carry a partial positive charge, and the oxygen atom carries a partial negative charge.
Thus, there is a tendency for the partial negative oxygen atom to be attracted to the positively charged portion of another substance, and the partial positive hydrogen atoms to be attracted to the negative portion of the substance.
This attraction is called polarity. A substance is said to be polar when it carries both a positive and negative charge in its neutral state. Hence water dissolves a substance when weak charges on the water molecule attract the oppositely charged portion of that substance due to its polarity.
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PLEASEEEE HELPPPP I’ll make you Brainlys Summary
Now, create of summary of what you've learned.
1. Complete the table below for protons, neutrons, and electrons. Respond with a Y for yes or N of no.
1
2
3
***
***
***
Question
Score: 0/4
Identifies Element?
Affects Mass?
Affects Charge?
***
Proton
***
Neutron
***
Electron
***
Answer:
Explanation:
For the first row, only protons identify an element. For the second row, protons and neutrons affect mass. For the third row, protons and electrons affect charge.
If you wear contact lenses, why should you remove them while you are in the laboratory?
A)
They can dry out your eyes while you are doing your experiment.
B)
They can hold chemicals that accidentally splash into your eye next to your eye and cause permanent damage.
C)
They can fall out if you do not remove them.
D)
None of the above
Please select the best answer from the choices provided
A
B
C
D
Contact lenses have adhesive nature
In laboratory perhaps any chemical rushes into your eye then the contact lenses can catch and hold them there
which can cause severe damage to the eye lids
option B is correctNonpolar amino acid residues are typically found in the interior of globular proteins like trypsin. Which chemical force is most directly responsible?.
The chemical force most directly responsible in the given case is hydrophobic interactions.
The interactions between hydrophobes and water, or low water-soluble compounds, are illustrated by the hydrophobic interactions. Nonpolar hydrophobes often have a longer carbon chain than polar molecules and do not interact with the water molecules. By removing a peptide from the N terminus of trypsinogen, it can become trypsin, which allows a salt bridge to develop between the new N-terminal.
The trypsin "activation domain" undergoes a conformational shift in response to the development of this salt bridge, resulting in the establishment of the oxyanion hole and S1 binding site. Trypsinogen activation thus seems to be an illustration of protein folding influenced by electrostatic interactions. The activation domain receives 5 kcal/mol of stabilization energy through hydrophobic interactions with the Ile16 side chain.
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What mass (in g) of potassium chlorate is required to supply the proper amount of oxygen needed to burn 123.7 g of methane?
So amount of KClO3 required = 123.7*5/3 gms = 206.166 gms.
What amount of KClO3 will be used in the experiment? How long should it be heated?shows how to set the KClO3 crucible on a clay triangle with the cover slightly ajar. Heat the crucible containing the powders gently for about 8 minutes, then vigorously for 10 minutes. Potassium chlorate (KClO3) is a powerful oxidising agent with numerous applications. It's in explosives, fireworks, safety matches, and disinfectants, among other things. You may have used it to generate oxygen in the lab as a high school or college chemistry student. While it is not the most efficient chemical reaction, making potassium chlorate is as simple as boiling bleach, cooling it, and mixing it with a saturated solution of salt substitute in water. Because potassium from the salt substitute displaces sodium from the sodium chlorate formed by boiling the bleach, the synthesis works.
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A cup of coffee contains 87.2 mg of caffeine. how many grams is this?
Answer:
0.0872g
Explanation:
Since mg is smaller than g, you will have to multiply the mg by milli which is equal to 10⁻³.
87.2 × 10⁻³ = 0.0872 grams
A cup of coffee contains 87.2 mg of caffeine. The number of grams present in the cup of coffee is 0.0872g.
What are grams and milligrams?Grams and milligrams are the measurement units that measure the amount or quantity of matter. It measures the solid mass and the quantity of matter. It is the SI unit of mass. There are seven units of measurement.
These units are Length - meter (m), Temperature - kelvin (K), amount of substance - mole (mole), Luminous intensity - candela (cd), Electric current - ampere (A), Mass - kilogram (kg), Time - second (s).
Here the mass of caffeine is asked in grams, which are given in milligrams.
As we know, 1 gram is = 1000 milligrams.
0.0872g = 87.2 mg
Thus, the number of grams present in the cup of coffee is 0.0872g.
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iv. Write down the balanced chemical equation for the reaction: a. after bubbling air through the lime water. b. after the disappearance of pink colour of sodium hydroxide reacting with hydrochloric acid and phenolphthalein.
Answer:
sodium hydroxide + Hydrochloric acid -> Sodium chloride + Water
Explanation:
sodium hydroxide + hydrochloric acid = neutral solution
[Base]. [Acid]
This turns the phenophthalein Colourless
Read and record the temperature on each of these thermometers.
100
09
50
40
30
20
Ro
°C
100
90
06
70
60
50
40
30
20
10
100
80
70
60
50
40
30
220
°C
100
06
50
100-
90
08
70
60
eel heat and measure
40
°C
100
30
20
100
80
50
°℃
-100
40
R20
Answer:
Most thermometers have two scales for temperature, Fahrenheit and Celsius. Read the numbers for °F (degrees of Fahrenheit). Each long line is for 1°F temperature. The four shorter lines between each long line are for 0.2°F (two tenths) of a degree of temperature.
Explanation:
Answer question 7. Circle the largest atom or ion in each grouping (I will give brainliest)
S, S^2-, Cl
Al, Al^3+, Mg
Sb, Se, Se^2+
Ca, K^1-, Ca^2+
Be^2+, Be, Na
According to the atomic radius, the largest atom or ion in each grouping are – [tex]S^2^-[/tex], [tex]Mg[/tex] , [tex]Sb[/tex] , [tex]Ca[/tex] , [tex]Na[/tex] .
A measure of the size of an atom is the atomic radius of a chemical element, which is normally the average distance between the core of the nucleus and the outermost isolated electron. There are several non-equivalent descriptions of atomic radius since the border is not a clearly defined physical object.
Since the net nuclear charge steadily rises as a result of higher electron attraction to the nucleus, the radius of atoms decreases across a period. However, as the number of shells in each atom grows along the group, the atomic radius increases.
Neutral atoms typically become larger down a group and smaller across a period. The radius of a neutral atom increases or decreases as it acquires or releases an electron, becoming an anion or cation, respectively.
In the given groupings, the size of the atoms and ions according to the atomic radius is as follows:
[tex]S^2^- > S > Cl[/tex]
[tex]Mg > Al > Al^3^+[/tex]
[tex]Sb > Se^2^- > Se[/tex]
[tex]Ca > K^+ > Ca^2^+[/tex]
[tex]Na > Be > Be^2^+[/tex]
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What is the net ionic formula if aqueous hypochlorous acid and aqueous calcium hydroxide react?
Calcium hypochlorite is created when aqueous hypochlorous acid and aqueous calcium hydroxide combine.
What is a ionic formula?
The positive ion, also known as a cation, comes first in the formula of an ionic compound, followed by the negative ion, also known as an anion. A balanced formula has a neutral electrical charge, or zero net charge. Ionic compounds can be described using chemical formulas, which show the proportions of interacting components present in an ionic solid or salt.
The term "neutralisation reaction" is typically used to describe the reaction between an acid and a base where salt and water are the end products.In this query, aqueous hypochlorous acid is used as the acid and aqueous calcium hydroxide as the base.Due to the exchange of cations and anions caused by the acid and base, the reaction passes through a double displacement reaction.The net ionic equation primarily demonstrates how water is created because the salt product is typically soluble.Calcium hypochlorite is created when aqueous hypochlorous acid and aqueous calcium hydroxide combine.The graphic that is associated to the solution contains the reaction's balanced equation.To learn more about ionic formula from the given link below,
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is found in all living things which make them organic.
Producing sodium chloride (table salt) is impractical and expensive. Sodium
chloride can be extracted from seawater. How could this be
done using a common renewable energy source?
For the harvesting of salt from seawater, solar energy is used. To evaporate seawater, solar energy is used. As the concentration of the salt increases, it crystallizes.
What is renewable source of energy?Renewable energy is defined as energy derived from natural sources that is replenished at a faster rate than it is consumed.
Sunlight and wind are two examples of such constantly replenishing sources. Renewable energy sources are plenty and are all around us.
Solar energy is utilized to get salt from seawater. Solar energy is used to evaporate seawater. The salt crystallizes as its concentration increases.
Thus, this way, salt extraction can be done using a common renewable energy source.
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What is the concentration of [h ] in molars, millimolars, and micromolars for a solution of ph 5?
concentration of [h +] in molars millimolars, and micromolars for a solution of ph 5
molar concentration of [H +] = 10^(-5)M
concentration of [H +] in millimolar = 10^(-8)milliM
concentration of [H +] in micromolar = 10^(-11)microM
What is molars, millimolar and micromolar?
The term "molar" describes the moles per litre of a solution, which is the unit of concentration molarity. The phrase is most frequently used in chemistry to refer to a solute's molar concentration in a solution. Molar concentration is measured in mol/L or M.
A millimolar is a unit used to quantify molar concentration. It is a multiple of unit molar generated from SI that is frequently stated as 10 -3 molar.
A measuring unit for molar concentration is called a micromolar. It is a multiple of unit molar generated from SI that is frequently stated as 10 -6 molar.
pH = -log 10 [H +]
Thus, molar concentration of [H +] = 10^(-5)M
concentration of [H +] in millimolar = 10^(-8)milliM
concentration of [H +] in micromolar = 10^(-11)microM
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Coffee has a ph of approximately 5. 0. What results would you predict if we added lactase to a solution of milk and coffee? would glucose be produced? provide your rationale.
Lactose contains sugar and glucose, which is found in lactose, glucose will be formed when coffee is added to milk and then lactose is added to the coffee and milk combination.
Because milk contains calcium, it is white in colour and contains the known sugars lactose and glucose. Lactose, a type of sugar present in milk, turns into glucose when combined with coffee.
Farmers dry the brownish bean-shaped coffee seed, which is then ground into a fine powder and combined with milk and sugar to make coffee. In general, Brazil and other nations are where you may find coffee.
Because lactose contains sugar and glucose, when coffee is added to milk and then lactose is added to the coffee and milk solution, glucose will be created.
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The bonding of water molecules to each other with ____________ bonds is called hydrogen bonding.
The bonding of water molecules to each other with hydrogen bonds is called hydrogen bonding.
In chemistry, hydrogen bonding is crucial as it holds water molecules together tightly.
Individual water molecules are made up of oxygen and hydrogen atoms which are linked together through covalent bonds.
While adjacent molecules are attached to each other through electrostatic attractions called hydrogen bonding.
Moreover, a water molecule is a dipole substance as uneven sharing of electrons creates two poles on it. One is on the hydrogen atom which is positively charged and the other is on the oxygen atom which is negatively charged. Overall it's a neutral compound.
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What of the following of density is true. a density is measured in grams. density is mass per unit volume. density is measured is millimeters density is a chemical property
prove that liquid pressure (p)=phg.
I think it will be helpful for you
Explanation:
Calculate the number of atps that will be made in the complete oxidation of arachidonic acid.
The number of ATPs that will be made in the complete oxidation of arachidonic acid is 155.
There are 9 β-oxidation cycles for complete oxidation of arachidonic acid (it has 20 carbon atoms).
Arachidonic acid has 20 carbon atoms and four double bonds (see picture below).
One β-oxidation (beta-oxidation) cycle produces 1 NADH, 1 FADH2, and 1 acetyl CoA (sea the picture below).
For 9 cycles: 9 NADH, 9 FADH2, and 10 acetyl CoA.
NADH and FADH2 enter Electron Transport System (ETS) cycle to generate 3ATP and 2ATP respectively.
Acetyl CoA enter into tricarboxylic acid cycle (TCA) and each CoA gives 12 ATP.
9 NADH = 9 x 3 = 27 ATP
9 FADH2 = 9 x 2 = 18 ATP
10 acetyl-CoA = 10 x 12 = 120 ATP
Net yield of ATP = 27 ATP + 18 ATP + 120 ATP -2 ATP - 8 ATP (it has four double bonds)
Net yield of ATP = 155 ATP
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The number of calories needed to raise the temperature of 32 g of water from 12 °c to 54 °c is.
1349.13 calories are required in order to raise the temperature of 32g of water from 12°C to 54°C.
what is specific heat capacity?
"The amount of heat required to change the temperature of a unit mass of the substance by one degree" is the definition of specific heat capacity for any substance. This is expressed as: Specific heat capacity is a sort of thermal inertia since it shows how resistant a substance is to changes in temperature.
Water has a specific heat capacity of about 4.2 J/g°C. As a result, to increase 1 gramme of water by 1 degree Celsius, 4.2 joules of energy are required.
By formula,
Q = mcΔT = 32*4.2*42 = 5644.8 J
One calorie= 4.184 joules
thus, Q = 5644.8/4.184 calorie = 1349.13 calories.
Thus 1349.13 calories are required in order to raise the temperature of 32g of water from 12°C to 54°C.
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What are the end products of photosynthesis? oxygen and carbohydrate water and carbon dioxide water and oxygen carbohydrate and water
The end products of photosynthesis are oxygen and carbohydrate.
The overall balanced eqation for photosynthesis reaction:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
CO₂ is carbon dioxide or carbon(IV) oxide
H₂O is water molecule
C₆H₁₂O₆ is carbohydrate
O₂ is oxygen molecule
Light energy is transformed into a chemical energy, that is stored in a carbohydrate molecules (glucose), which are synthesized from carbon dioxide and water.
Plants (not animals) convert a solar energy into the chemical energy of sugars (food).
The pigment chlorophyll absorbs one photon and loses one electron (it passed throw an electron transport chain) in the light-dependent reactions.
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