The gravimetric factor for Br- using silver bromide is 0.425.
What is the gravimetric factor?The gravimetric factor is an expression that is used to convert grams of a compound into grams of a single element.
It is expressed as a ratio of the formula weight (FW) of the substance that is being determined to that of a second substance that is weighed.
Gravimetric factor = formula mass of substance weight / formula mass of substance soughtFor example formula of silver bromide is AgBr and the formula mass of silver bromide is 188 g/mol
Formula mass of bromide ion = 80 g/mol
Gravimetric factor = 80/1188
Gravimetric factor = 0.425
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Pick one buffer and describe how it is used in the human body to resist changes in pH.
Answer the following questions:
What happens to the body if this buffer is not effectively working?
What signs and symptoms might a person with this imbalance experience?
How can one treat the buffer imbalance?
Bicarbonate ions plus water are produced when carbonic acid combines with hydroxide ions. Headaches, Diarrhea, Fatigue, and Irritability are symptoms. sodium bicarbonate intravenously to increase blood pH.
What causes weariness primarily?The majority of the time, one or more of your routines or habits—particularly inactivity—can be linked to exhaustion. It frequently has depression as an association. Sometimes, being tired is a sign of other underlying medical issues that need to be treated.
How does being tired feel like?A lack of motivation and energy called fatigue. Aside from exhaustion, drowsiness and apathy (the indifference to what happens) can also be symptoms. An appropriate and significant response to physical exercise, mental stress, boredom, or inadequate sleep can be fatigue.
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What would the approximate age of an
igneous rock that contains only 1/4 of its
original carbon-14 (half-life of carbon is
5700 years)
Explanation:
Carbon-14 has a half life of 5730 years, meaning that 5730 years after an organism dies, half of its carbon-14 atoms have decayed to nitrogen atoms. Similarly, 11460 years after an organism dies, only one quarter of its original carbon-14 atoms are still around.
A 100. 0 ml sample of 0. 10 m nh3 is titrated with 0. 10 m hno3. Determine the ph of the solution after the addition of 100. 0 ml of hno3. The kb of nh3 is 1. 8 × 10-5.
The pH of the solution after the addition of 100. 0 ml of HNO3. The kb of NH3 is 1. 8 × 10-5. So, pH is 10.9 basic .
This neutralization occurs as the acid is added to the base:
NH3(aq)+ HNO3(aq)= NH4NO3(aq)+ H2O(l)
The initial moles of NH3present is given by,
nNH3= c×v= 0.10× 100/1000= 0.01m
The number of moles of
HNO3 added is given by:
nHNO3= c×v= 0.10× 100/1000= 0.001
It is clear from the equation that the acid and base react in a 1:1 molar ratio. So, the no. moles of NH3remaining will be 0.01 - 0.001= 0.009
The total volume is now
100.0+100.0= 200.0x cm3
The concentration of NH3 is given by,
[NH3]= c/v= 0.001/200/1000= 0.05x mol/l .
pOH= 12 (pKb− logb)
where b is the base's concentration.
Given that there is little dissociation, we can roughly compare this to the starting concentration.
pKb= −logKb= −log(1.8×10−5)= 4.744
pOH= 3.056
At 25∘xC, we know that, pH+ pOH=14
pH= 14− 3.056= 10.9
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What is the molar ratio of acid to base for the neutralization reaction between hcl and naoh?.
The mole ratio of acid to base when neutralizing hydrochloric acid with sodium hydroxide is 1:1. A mole of NaOH would completely neutralize one mole of HCl.
What is Acid and Base Neutralization?A solution can be neutralized by combining an acid and a base. When the moles of the acid and the moles of the base are equal, neutralization takes place. The balanced chemical reaction can be used to calculate the molar ratio of acid to base. The molar ratio is represented by the reaction coefficient. The base's moles and molar mass can then be used to calculate its moles.
What if barium hydroxide were used instead of NaOH?If, however, chlorine dioxide, if barium hydroxide were added, the mole ratio would be 2:1.
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Do Raquel volumes of Nitrogen and Oxtgen at the same temperature and pressure have an equal number of particles?
Yes, equal volumes of Nitrogen and Oxygen at the same temperature and pressure have an equal number of particles
According to Avogadro's law, total number of atoms/molecules of a gas (i.e. the amount of gaseous substance) is directly proportional to the volume occupied by the gas at constant temperature and pressure.
From this we can suggest that equal volumes of all gases at the same temperature and pressure contains the same number of particles.
So if we take the example of equal volumes of Nitrogen and Oxygen at the same temperature and pressure will have same number of particles or molecules.
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Using the same sample of gas (P₁ = 735 torr, T₁ = 29 °C), we wish to change the
pressure to 7350 torr with no accompanying change in volume or amount of gas. What
temperature T2, in Celsius, is needed to reach this pressure?
The required temperature to reach 6650 torr pressure is [tex]$290^{\circ} C$[/tex]
How to calculate pressure?The force of all gas particle/wall collisions divided by the surface area of the wall is the definition of pressure (P): One of the fundamental quantifiable variables of this phase of matter, pressure, is a property shared by all gases. In the physical sciences, pressure is defined as the stress at a point within a confined fluid or the perpendicular force per unit area. The definition of pressure is "force applied per unit area." It can be calculated mathematically using P=FA, where F is the force acting perpendicular to surface area A. The pascal (Pa), or one newton per square meter (N/m 2), is the common unit of pressure.- The pressure of a sample of gas initially is [tex]$P_1=665$[/tex]torr.- The temperature of a sample of gas initially is [tex]$T_1=29^{\circ} C$[/tex].- The pressure of a sample of gas at final state is [tex]$P_2=6650$[/tex] torr.- The volume of the gas sample at initial and final state is [tex]$V_1=V_2=V$[/tex].For the initial state of the gas, the mathematical expression for pressure and temperature is:
P1/T1..............Constant
For the final state of the gas, the mathematical expression for pressure and temperature is:
P2/T2..............Constant
Dividing equation (1) by the equation (2) and simplifying it, we have:
[tex]$\frac{\frac{P_1}{T_1}}{\frac{P_2}{T_2}}=\frac{\text { constant }}{\text { constant }}$[/tex]
[tex]$\frac{\frac{P_1}{T_1}}{\frac{P_2}{T_2}}=1$[/tex]
[tex]$\frac{T_2}{T_1}=\frac{P_2}{P_1}$[/tex]
[tex]$T_2=T_1 \times \frac{P_2}{P_1}$[/tex]
[tex]$T_2=29^{\circ} \mathrm{C} \times \frac{6650 \text { torr }}{665 \text { torr }}$[/tex]
[tex]$T_2=29^{\circ} \mathrm{C} \times 10$[/tex]
[tex]$T_2=290^{\circ} \mathrm{C}$[/tex],
Thus, the required temperature to reach 6650 torr pressure is [tex]$290^{\circ} C$[/tex]
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In the citric acid cycle, the acetyl group is removed from acetyl coa and attached to oxaloacetate to form.
In the citric acid cycle, the acetyl group is removed from acetyl CoA and attached to oxaloacetate to form citrate.
What is acetyl CoA?A component of cellular respiration (energy conversion), acetyl-CoA or acetyl coenzyme A adds acetyl groups to metabolic reactions. These processes are employed in the metabolism of proteins, carbohydrates, and lipids to produce adenosine triphosphate (ATP), lactic acid, and ketone bodies, which serve as energy sources. Acetyl-CoA also has a significant regulatory role in intracellular pathways, according to recent study. In times of fasting or starvation, it is also crucial for energy production.
Formation:
Both inside and outside of the cell mitochondria, acetyl-CoA is formed. Acetyl-CoA must be freely available because it is a metabolite, a component required for metabolism. It can be created through the catabolism (decomposition) of lipids and carbohydrates (glucose) (fatty acids). Transferring the carbon atoms from acetyl to other molecules is its main function.
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This organelle functions in cellular respiration and makes energy
O mitochondria
O lysosome
O endoplasmic reticulum
O Golgi apparatus
What is the mass number of an element if it's atom contains 10 protons, 10 electrons and 12 neutrons.
Answer:
20
Explanation:
Because mass number is equal to Atomic number.
What happens to the particles
of a liquid when it evaporates?
A. They spread farther apart.
B. They become tightly packed.
C. They stop moving.
D. They stay in the same place.
Evaporation happens when a liquid substance becomes a gas. When water is heated, it evaporates. The molecules move and vibrate so quickly that they escape into the atmosphere as molecules of water vapor.
There are some particles in a liquid that have enough energy to escape the bonds to the other particles even below boiling point. This means they can move freely and turn into gas particles. The difference between boiling and evaporation is because boiling happens at a certain temperature and evaporation can happen at any temperature below boiling point.
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Sulfur dioxide is a colourless gas which can be found in air.
Liquid sulfur dioxide is stored in cylinders.
When the cylinder is opened the liquid quickly changes into a gas.
Use the kinetic particle theory to describe the changes in movement and arrangement of
the particles when liquid sulfur dioxide becomes a gas
When a gas turns to a liquid (condenses) or a liquid turns to a solid (solidifies) the particles lose energy to the surroundings.
What happens to the particles when a gas turns into a liquid?
The particles are held densely packed together as a solid by the strong attractions between them. Even if they vibrate, the structure is not disturbed by this. Heat causes a solid's particles to become more energetic and begin to vibrate at an ever-increasing pace. At first, the structure is progressively weakened, which causes the solid to expand. Up to the point where the particles begin to escape the structure, greater heating produces more energy. The particles can move even though their connections are still shaky. The solid is currently melting and turning into a liquid. Although the particles in a liquid are identical to those in a solid, they are more energetic.Learn more about Kinetic energy refer to :
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You are given the following problem to solve. The ideal gas constant for this equation will be
0.0821 L(atm)/mol(K).
How many liters of CO, will be produced when 15.8 g of butane (CH,o) are burned at 128°C
at 0.98 atm?
Answer:
V = 9.14 L
Explanation:
To find the volume of butane, you need to use the Ideal Gas Law:
PV = nRT
In this equation,
-----> P = pressure (atm)
-----> V = volume (L)
-----> n = number of moles
-----> R = Ideal Gas Constant (L*atm/mol*K)
-----> T = temperature (K)
Before you can solve for the volume, you need to (1) convert the mass of butane to moles (using the molar mass) and then (2) convert the temperature from Celsius to Kelvin.
Atomic Mass (C): 12.011 g/mol
Atomic Mass (H): 1.008 g/mol
Molar Mass (C₄H₁₀): 4(12.011 g/mol) + 10(1.008 g/mol) = 58.124 g/mol
15.8 g C₄H₁₀ 1 mol
--------------------- x ----------------- = 0.272 moles C₄H₁₀
58.124 g
------------------------------------------------------------------------------------------------------------
P = 0.98 atm R = 0.0821 L*atm/mol*K
V = ? L T = 128°C + 273 = 401 K
n = 0.272 moles
PV = nRT <----- Ideal Gas Law
(0.98 atm)V = (0.272 moles)(0.0821 L*atm/mol*K)(401 K) <----- Insert variables
(0.98 atm)V = 8.9548 L*atm <----- Multiply right side
V = 9.14 L <----- Divide both sides by 0.98
What is the change in boiling point atb in Celsius of a 0.852m solution of C6H14 in benzene?
Kb(benzene)= 2.65 degrees Celsius/m
The change in boiling point of C6H14 in benzene is 2.257 degree Celsius.
What is boiling point?
The boiling point is the temperature at which vapor pressure of the liquid is equal to the atmospheric pressure or the temperature at which the liquid phase turns into vapor state. The boiling point of pure water at sea level is 100 degree Celsius.
The change in boiling point can be calculated as,
ΔTb = Kb x m
where ΔTb is change in boiling point, Kb is Ebullioscopic constant and m is molality of the solute.
ΔTb = (2.65 degree Celsius / m) x 0.852m = 2.257 degree Celsius.
Therefore, the change in the boiling point of 0.852m solution of C6H14 in benzene is 2.257 degree Celsius.
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Answer:
The correct answer for ACELLUS is 2.25
Explanation:
The ability of a covalently bonded atom to attract the shared electrons is called.
The ability of an atom to pull shared electrons is known as electronegativity.
What is electronegativity?Electronegativity is the property of an atom that allows it to attract the shared electrons from a covalent bond to itself. The shared electrons will be uniformly distributed if the electronegativity of the connected atoms is the same.
What is the electronegativity trend of the periodic table?On the periodic table, electronegativity usually increases from left to right throughout a period and decreases as you move down a group. The most electronegative elements are thus found in the top right corner of the periodic table, whereas the least electronegative ones are found in the bottom left.
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What is the basic unit of all living things?
O organ system
O cell
O tissue Oorgan
(PLEASE HURRY)
Answer:
Cells
Explanation:
Everything in living things is made from cells. Cells come together to make tissues, which make organs, which make organ system.
A) The enthalpy of combustion of Octane (C8H18) is –5440 kJ mol–1. How much heat will be released by combustion of 1 kg of Octane?
B) Given the enthalpy change for the reaction:
2 HgO (s) Δ2Hg(l) + O2(g) ΔHo = 181.6 kJ mol–1
what is the enthalpy of formation of HgO?
The energy that is released by 1Kg of octane is 47872 kJ while the heat that is enthalpy of formation of the mercury oxide is -181.6 kJ mol–1.
What is energy released?We know that the enthalpy of combustion has to do with the heat that is evolved when we burn one mole of a substances in oxygen. We need to first obtain the number of moles of the octane as follows;
Number of moles = mass/molar mass = 1 * 10^3 g/114 g/mol = 8.8 moles
If 1 mole of octane produces 5440 kJ of heat
8.8 moles of octane would produce 8.8 moles * 5440 kJ/1 mole
= 47872 kJ
b) Given that the heat that the energy that is required to decompose the compound is 181.6 kJ mol–1 then the enthalpy that is required to form the compound is -181.6 kJ mol–1.
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Which equation describes a single-replacement reaction?
Responses
H2 (g) + Br2 (g)→2HBr (g)
Mg(s)+Cu(NO3)2(l)→Mg(NO3)2(s)+Cu(s)
2N2O5 (g)→O2 (g) + 4NO2 (g)
2Na(s) +Cl2(g) → 2NaCl(s)
Single- replacement reaction is described by the chemical equation Mg(s)+Cu(NO₃)₂(l)→Mg(NO₃)₂(s)+Cu(s) as more reactive magnesium displaces copper from it's salt as it is less reactive.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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What is the correct temperature unit for the ideal gas law, as given in the manual?.
The measurement must be in kelvins. If you are given a temperature in Celsius, don't forget to add 273.15 to the answer.
What degree of heat does an ideal gas require?One mole of an ideal gas has a volume of 22.710947(13) liters at standard pressure and temperature (an absolute pressure of exactly 105 Pa and a temperature of 273.15 K), as stated by IUPAC since 1982.
Explain what an ideal gas is.An ideal gas is defined as a gas whose molecular volume and intermolecular forces are so negligible as to not affect the behavior of the molecules of gas.
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If you mix 30 mL of cold water with 70 mL of hot water in a calorimeter, and the temperature of the cold water increases by 1.9°C, then how much heat (in joules) did the cold water absorb (only enter the number, not units, and assume the density of water to be 1.00g/mL, and the specific heat capacity of water to be 4.184 J/g-°C)?
when the density of the substance is 1.00 g/mL and its heat capacity is 4.184 J/g. Here, 30 mL times its density with one gram each milliliter, or 30g, equals the mass of the cold water.
What is the purpose of a calorimeter?A device known as an instrument measures the amount of heat produced during a chemical or physical process. By way of illustration, whenever an exergonic reaction occurs in a solution in a measuring device, it solution absorbs the energy produced by the reaction, increasing its temperature.
Where is the calorimeter used?A calorimeter is used to measure the variations in body temperature. Enthalpy, stability, specific heat, or other thermochemical quantities calculation
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Please give a detailed explanation
The number of charges on an ion which is formed by a metal is equal to the group A number of the metal in the periodic table and the number of charges on an ion which is formed by a non-metal in the periodic table is equal to the group number minus eight.
What is group in periodic table?In the periodic table there are a total of 18 groups. The group A which are divided as IA, IIA, IIIA, IVA, VA, VIA, VIIA and VIIIA.
The group IA is known as alkali metal in the periodic table. The group IIA is known as alkaline earth metal in the periodic table. The group IIIA is known as boron family in the periodic table. The group IVA is called transition elements in the periodic table. The group VA is known as pnictogens in the periodic table. The group VIA is known as chalcogens in the periodic table. The group VIIA is known as Halogen family in the periodic table. The group VIIIA is called Noble gas ot inert gas elements in the periodic table.
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Provide the major organic product of the reaction below.
When cyclic ester is reacted with ethyl alcohol in presence of heat and acidic medium, ethyl hexanoate is formed. The structure of ethyl hexanoate is attached in image.
What do you mean by cyclic ester ?Lactones are the name for cyclic esters. The COOH and OH groups that unite to generate water in these instances are a component of the same molecule.
German chemist Leopold Gmelin likely abbreviated the word "ester" from the German Essigäther, "acetic ether," when he first used it in 1848.
First, carbonyl oxygen abstracts a proton. The production of an ester on one side of the chain and alcohol on the other follow the attack of the ethyl molecule on the carbonyl carbon.
Thus, ethyl hexanoate is formed as a product.
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Part D Question Now that you have observed the internal parts of the flower, write the names of the structures in the diagram. If necessary, do some more research online. Lines Shapes Fill:▼ Line:▼ Width:
The following internal parts of the flower:-
Stigma - the head of the pistil. The stigma receives pollen, with a view to start the process of fertilization.
Style - this is the name for the stalk of the pistil.
Ovary - the bottom of the pistil.
Ovules - these are the flower's eggs, located inside the ovary.
Anther- carries pollen sacs, wherein pollen grains are shaped. Pollen consists of the male cells.
Filament- supports the anther.In female parts of the flower is pistil = Stigma + Style + Ovary
In male parts of the flower is stamen = anther + filament
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A compound that contains only carbon, hydrogen, and oxygen is 68. 5% c and 8. 63% h by mass. What is the empirical formula of this substance?.
Given that we have a mass percentage. Since it is convenient to start with 100g of the chemical, there are 60g of sulfur and 40g of oxygen in a 100g sample of the above compound.
The reactants consist of four hydrogen atoms, four oxygen atoms, and one carbon atom. The end products contain four hydrogen atoms, four oxygen atoms, and one carbon atom. This calculation is correct. The two elements carbon and hydrogen make up the simplest organic molecules. These substances are known as hydrocarbons. A gas mixture with two parts oxygen and four parts hydrogen was the most explosive. There was nothing left over after burning this gas mixture. It was the most explosive response because it was the most effective.
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What is the mass in Brams of each of the following? (Hint: See Sample Problems B and E.) a. 1.00 mol Li b. 1.00 mol Al c. 1.00 molar mass Ca d. 1.00 molar mass Fe c. 6.022 × 1023 atoms C 4 6.022 × 1023 atoms Ag
The mass in grams are as follows:
a) 6.94g
b)26.98 g
c) 12 g
d) 107.9 g
a) For 1.00 mol of Lithium , Li .molar mass of lithium is 6.94 g/mol
number of moles = mass / molar mass
mass = moles × molar mass
mass = 1 × 6.9
mass = 6.94 g
b) For 1.00 mol of Aluminum , Al .molar mass of Al is 26.98 g/mol
number of moles = mass / molar mass
mass = moles × molar mass
mass = 1 × 26.98
mass = 26.98 g
e) For 6.022 × 10²³ atoms of Carbon , C . molar mass of carbon is 12 g/mol
mass of C = (6.022 × 10²³ atoms / 6.022 × 10²³ atoms/mol ) × 12
mass of C = 12 g
d) for 6.022 × 10²³ atoms atoms of Ag . molar mass of Ag is 107.9 g/mol
mass of Ag = (6.022 × 10²³ atoms / 6.022 × 10²³ atoms/mol ) × 107.9 g/mol
mass of Ag = 107.9 g
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How to get the absolute zero from the graph for Charles law in Celsius? In this case what would be my value? Please help need it for my lab report.
At time t = 273.15 °C, the x-intercept occurs. According to Charles' law, an ideal gas's volume decreases as its temperature rises. At t = 273.15 °C, the graph's x-intercept, volume approaches zero.
Charles law experiment: what is it?Describe the Charles Law experiment. Gases have a tendency to expand when heated, according to Charles' law (sometimes referred to as the law of volumes), an experimental gas law. The Kelvin temperature and the volume will be directly proportional when the pressure on a sample of the a dry gas is held constant, according to a current interpretation of Charles's law.
Which laws—Charles and Boyles—have similarities?Boyle's law is formulated for systems with constant temperature, whereas Charles' law is formulated for systems with constant pressure.
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think have plenty of salts that are in front of you and you are trying to figure out which salts are soluble in water, and which ones of their products are soluble in water. For the following equation, identify which reactants and products are soluble/insoluble in water.
Based on the equation of reaction;
the reactants H₂SO₄ (aq) and Ba(OH)₂ (aq) are both solublethe product BaSO₄ is an insoluble saltWhat are soluble and insoluble salts?Salts are substances formed when all or part of the replaceable hydrogen ions in an acid is replaced by metallic or ammonium ions.
Salts may be soluble or insoluble.
Soluble salts are those salts that dissolve readily in water.
Insoluble salts are those that do not readily dissolve in water.
Considering the given equation of the reaction:
H₂SO₄ (aq) + Ba(OH)₂ (aq) ---> BaSO₄ (s)+ 2 H₂O (l)
The reactants are all soluble whereas the product, BaSO₄ is an insoluble salt and water is a liquid.
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a. What is the definition of a mole? b. What is the abbreviation for mole? SARM c. How many particles are in one mole? d. What name is given to the number of particles in a mole?
Mole is base unit of substance. The number of particles in one mole is equal to 6.022 × 10²³. The number of particle in a mole is called as Avogadro's number.
The mole of substance is the amount of substance that contain elementary particles as the number of atoms. the symbol of mole is mol. it is the SI unit of amount of substance. The number particles are ion one mole of substances is 6.022 × 10²³. The number of particles in one mole of substance is called as Avogadro's number.
Thus, Mole is base unit of substance. The number of particles in one mole is equal to 6.022 × 10²³. The number of particle in a mole is called as Avogadro's number.
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Element X is in group 3. Element Y is in group 7A or 17. Which chemical
formula shows the correct formula for the synthesis reaction of X and Y?
XY
XY3
X7Y3
X3Y7
Chemical formula of element X is in group 3, element Y is in group 7A or 17 is XY₃(option-b). Since the electrovalence of X is 3 and Y is 1.
What do you mean by chemical formula?A chemical formula lists the constituent elements of a compound along with how many atoms of each are present in the compound's smallest unit, whether it be a molecule or a formula unit. We can name simple compounds based on their chemical formulas by using the names of the elements and a few simple rules.
A compound's chemical formula is a symbol that represents the compound's chemical make-up. We can determine a compound's number and type of atoms from the chemical formula by looking at the elements that make up the compound.
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Describe how you would prepare a sample of sodium nitrate (V) in the laboratory using dilute nitric acid and aqueous sodium hydroxide
Answer:
576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670576482670
Explanation:
What would the sunscreen look like if it absorbed all of the visible light that hits it
Sunscreen look like if it absorbed all of the visible light that hits it look like skin bright
A substances that help protect the skin from the sun harmful rays and sunscreen reflect and absorbed and scatter both ultraviolet radiation and provide protection against both type of radiation and sunscreen contain ingredient that help absorbed UV light and they sit on the surfaces of the skin and reflect away from the skin and sunscreen ingredient form a thin protective film that penetrate from the skin
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