Answers
Molecular geometry around each carbon atom in a saturated hydrocarbon is Tetrahedral.
Explanation:
In saturated hydrocarbons (-CH₂-) the central atom (carbon) is bonded to either three or two hydrogen atoms and one or two carbon atoms. So, the central atom is having four electron pairs and all pairs are bonding pairs and lacks any lone pair of electron. According to Valence Shell Electron Pair Repulsion (VSEPR) Theory the central atom with four bonding pair electrons and zero lone pair electrons will attain a tetrahedral geometry with bond angles of 109°.
the molecular egometry around each carbon atom in a staurated hydro carbon is tetrahydral
Related Questions
An element's atomic number is the _____?
Answers
Hope it helped you.
-Charlie
When the hydroxyl group, like in the image below, is attached to a carbon compound, the organic compound is a(n)
A hydrogen atom covalently bonded to an oxygen atom, which is covalently bonded to a carbon in the carbon chain.
carboxylic acid.
alcohol.
ether.
ketone.
Answers
The organic compound is an Alcohol.
Explanation:
Alcohol are class of organic compounds which are derived from water molecule. When one hydrogen atom in water molecule is replaced by an alkyl group it forms alcohols. i.e.
H-O-H + R → R-O-H + H
In above equation, R-O-H is the general formula of alcohols.
Examples:
CH₃-O-H Methanol
CH₃-CH₂-O-H Ethanol
CH₃-CH₂-CH₂-O-H Propanol
CH₃-CH₂-CH₂-CH₂-O-H Butanol
CH₃-CH₂-CH₂-CH₂-CH₂-O-H Pentanol
Ethyl acetate is a sweet-smelling solvent used in varnishes and fingernail polish remover. it is produced industrially by heating acetic acid and ethanol together in the presence of sulfuric acid, which is added to speed up the reaction. the ethyl acetate is distilled off as it is formed. the equation for the process is as follows.
Answers
Ethyl acetate is a solvent used in varnishes and nail polish remover, and it is produced by heating acetic acid and ethanol in the presence of sulfuric acid. It is also used to extract caffeine from coffee and to remove nail polish and paint.
Explanation:Ethyl acetate is a sweet-smelling solvent used in varnishes and fingernail polish remover. It is produced industrially by heating acetic acid and ethanol together in the presence of sulfuric acid, which is added to speed up the reaction. The ethyl acetate is distilled off as it is formed.
Ethyl acetate (CH, CO₂C₂H5) is the solvent in many fingernail polish removers and is used to decaffeinate coffee beans and tea leaves. It is prepared by reacting ethanol (C₂H5OH) with acetic acid (CH₂CO₂H); the other product is water. A small amount of sulfuric acid is used to accelerate the reaction, but the sulfuric acid is not consumed and does not appear in the balanced chemical equation.
Esters are common solvents. Ethyl acetate is used to extract organic solutes from aqueous solutions-for example, to remove caffeine from coffee. It also is used to remove nail polish and paint.
Ammonium nitrite undergoes decomposition to produce only gases as shown below. nh4no2(s) → n2(g) + 2h2o(g) how many liters of gas will be produced by the decomposition of 32.0 g of nh4no2 at 525°c and 1.5 atm?
Answers
we can see that every 1 mole of NH4NO2 will produce 1 mole of N2 and when the water also on the gas phase so, every 1 mole of NH4NO2 will produce 3 moles of gas
now we need to get number of moles of NH4NO2 = mass/molar mass
when the mass = 32 g and the molar mass of NH4NO2 = 64 mol/g
∴moles of NH4NO2 = 32 g / 64 mol/g = 0.5 mole
so, the moles that produced of gas will be = 3 * 0.5 = 1.5 moles
now, we can use the ideal gas formula to get V:
PV = nRT
when P is the pressure = 1.5 atm
n is the number of moles = 1.5 moles
R is the ideal gas constant = 0.0821 L*atm/mol*K
and T is the temperature in Kelvin = 525 °C + 273 = 798 K
so by substitution:
1.5 atm * V = 1.5 moles * 0.0821 * 798 K
∴ V = 65.5 L
Approximately 32.77 liters of gas will be produced by the decomposition of 32.0 g of NH4NO2 at 525°c and 1.5 atm.
Explanation:Decomposition of 32.0g of NH₄NO₂ can be calculated by using the Ideal Gas Law PV=nRT where P is the pressure, V is the volume, n number of moles, R the gas constant and T temperature. Given the molar mass of NH₄NO₂ is about 64.04 g/mol, we divide 32.0g by 64.04 g/mol to get 0.5 moles of NH₄NO₂ The reaction of NH₄NO₂ decomposing to N₂ and H₂O shows that for every 1 mole of NH₄NO₂ , 1 mole of N₂ and 2 moles of H2O are produced. Thus, in total, by decomposing 0.5 moles of NH₄NO₂ we produce 0.5 * 3 = 1.5 moles of gases at 525 °C and 1.5 atm.
Applying these values into the Ideal Gas Law, substituting R for the value of 0.0821 (when pressure is in atm, volume in L, and T in kelvin), and noting that 525°C is equivalent to 798.15 K (273.15 + 525 = 798.15), we get V = (1.5*0.0821*798.15)/1.5. By solving this, we get the volume of gasses to be approximately 32.77 liters.
Learn more about Chemical decomposition here:https://brainly.com/question/33839344
#SPJ11
a weather balloon contains 8.80 moles of helium at a ppressure of 0.992 atm and a temperature os 25 C at ground level. What is the volume of the balloon under these conditions?
Answers
PV = nRT
where
P - pressure - 0.992 atm x 101 325 Pa/atm = 100 514 Pa
V - volume
n - number of moles - 8.80 mol
R - universal gas constant - 8.314 Jmol⁻¹K⁻¹
T - temperature in kelvin - 25 °C + 273 = 298 K
Substituting these values in the equation
100 514 Pa x V = 8.80 mol x 8.314 Jmol⁻¹K⁻¹ x 298 K
V = 217 L
volume of balloon is 217 L
By using the Ideal Gas Law and the given conditions, we can calculate the volume of the weather balloon to be approximately 221.4 liters.
Explanation:The volume of a gas can be determined by using the Ideal Gas Law: PV = nRT. Here, P is the Pressure, V is the Volume, n is the number of moles, R is the universal gas constant and T is the absolute Temperature. The constants provided in the question are the moles of Helium (8.80 moles), the Pressure (0.992 atm) and the Temperature (25 C).
Firstly, we need to convert the temperature from Celsius to Kelvin. The conversion formula is: T(K) = T(C) + 273.15. Thus, T(K) = 25 + 273.15 = 298.15 K.
Now, we use these values in the Ideal Gas Law to find the volume. We rearrange the formula to solve for volume: V = nRT / P. Substituting the given values and the gas constant R as 0.0821 atm L/mol K, we get:
V = (8.80 moles * 0.0821 L atm / (mol K) * 298.15 K) / 0.992 atm = 221.4 L
Therefore, the volume of the weather balloon under the given conditions is approximately 221.4 Liters.
Learn more about Ideal Gas Law here:https://brainly.com/question/30458409
#SPJ11
The half-life of a particular element is 280 days. what is its decay constant?
Answers
N' = Ne^(-kt)
with N as the initial amount, k as the decay constant, and N' as the final amount. For decay, 280 days is the time it takes for the initial amount N to decay to 1/2N (half its original mass).
1/2A = Ae^(-280k)
1/2 = e^(-280k)
Solving for k, we will yield
ln(1/2) = -280k
k = ln(2) / 280 day^-1
k ≈ 2.5 × 10^-3 day^-1
Calculate the mass of Octane needed to release 6.20 mol Co2
Answers
Final answer:
To find the mass of octane required to produce 6.20 mol CO2, we use the stoichiometry of the combustion reaction and the molar mass of octane, resulting in a requirement of 88.56 grams of octane.
Explanation:
To calculate the mass of octane (C8H18) needed to produce 6.20 mol CO2, we first need the balanced chemical equation for the combustion of octane:
2 C8H18 + 25 O2 → 16 CO2 + 18 H2O
This equation tells us that 2 moles of octane produce 16 moles of CO2. From this, we can find the molar ratio between octane and CO2, which is 2 moles of octane per 16 moles of CO2, or 1 mole of octane for every 8 moles of CO2.
Next, we use the molar mass of octane, which is 114.23 g/mol (C=12.01 g/mol x 8 + H=1.008 g/mol x 18). Given that we have 6.20 moles of CO2, we can calculate the moles of octane needed:
6.20 mol CO2 x (1 mol C8H18 / 8 mol CO2) = 0.775 mol C8H18
Finally, we convert moles of octane to mass:
0.775 mol C8H18 x 114.23 g/mol = 88.56 g C8H18
Therefore, 88.56 grams of octane are needed to produce 6.20 moles of CO2.
List the number of each type of atom on the left side of the equation hbr(aq)+2naoh(aq)→2nabr(s)+h2o(l)
Answers
1) three hydrogen atoms, one in molecule HBr and two in two molecules of sodium hydroxide (NaOH).
2) one bromine atom (Br) in hydrobromic acid (HBr).
3) two sodium atoms (Na) in two molecules of NaOH.
4) two oxygen atoms in two melecules of sodium hydroxide.
The left side of the equation HBr(aq) + 2NaOH(aq) includes a total of three hydrogen (H) atoms, one bromine (Br) atom, two sodium (Na) atoms, and two oxygen (O) atoms.
To list the number of each type of atom on the left side of the chemical equation [tex]HBr(aq) + 2NaOH(aq) \rightarrow 2NaBr(s) + H_2O(l)[/tex], we first need to identify each atom present in the reactants. For HBr, we have one hydrogen (H) atom and one bromine (Br) atom. Then, for 2NaOH, since it has a coefficient of two, we count two sodium (Na) atoms, two oxygen (O) atoms, and two hydrogen (H) atoms. Therefore, the total count of each type of atom on the left side is:
Hydrogen (H) atoms: 1 (from HBr) + 2 (from NaOH) = 3Bromine (Br) atoms: 1 (from HBr)Sodium (Na) atoms: 2 (from NaOH)Oxygen (O) atoms: 2 (from NaOH)A compound contains 64.27% carbon, 7.19% hydrogen, and 28.54% oxygen. the molar mass is 168.19 g/mol. what is the molecular formula
Answers
calculating for 100 g of compound
C H O
mass 64.27 g 7.19 g 28.54 g
number of moles 64.27 g / 12 g/mol 7.19 g/1 g/mol 28.54 g / 16 g/mol
= 5.356 mol = 7.19 mol = 1.784 mol
divide by least number of moles
5.356 / 1.784 7.19 / 1.784 1.784 / 1.784
= 3.002 4.03 = 1.000
rounded off to nearest whole number
C - 3
H - 4
O - 1
empirical formula - C₃H₄O
mass of empirical formula = 12 g/mol x 3 + 1 g/mol x 4 + 16 g/mol x 1 = 56 g
molecular mass = 168.19 g/mol
molecular formula is the actual ratio of elements making up the compound
number of empirical units = molar mass of molecule / empirical mass
empirical units = 168.19 g/mol / 56 g = 3.00
there are 3 empirical units making up the molecular formula
molecular formula = 3 x C₃H₄O
molecular formula = C₉H₁₂O₃
The molecular formula for a compound with 64.27% carbon, 7.19% hydrogen, and 28.54% oxygen with a molar mass of 168.19 g/mol is C9H12O3.
Explanation:First, we assume 100g of the compound is present so the percentages can be taken as the mass in grams of each element. This gives us 64.27g of carbon, 7.19g of hydrogen, and 28.54g of oxygen. Then, we convert grams to moles using each element's molar mass (C=12.01g, H=1.01g, and O=16.00g).
So, for Carbon we get:
64.27g/12.01g = 5.349 moles
For Hydrogen we get:
7.19g/1.01g = 7.119 moles
For Oxygen we get:
28.54g/16.00g = 1.784 moles.
Now, we divide each mole number by the smallest number of moles calculated in the previous step (1.784) to determine the mole ratio, rounding to the nearest whole number. This will give us C3H4O1. Thus, our empirical formula (the formula in its lowest terms) is C3H4O1.
The next step is to determine the molecular formula, which tells us the actual number of atoms of each element in a molecule of the compound. To find the molecular formula, we compare the empirical formula mass to the molar mass of the compound to find a multiple which we then use to multiply the subscripts in our empirical formula. Therefore, with a molar mass of 168.19 g/mol and an empirical formula weight of 56.06 g/mol (C3H4O1), we find our multiple to be 3 (around 168/56).
The resulting molecular formula would be C9H12O3, meaning our compound consists of 9 carbon atoms, 12 hydrogen atoms, and 3 oxygen atoms.
Learn more about Molecular formula here:https://brainly.com/question/28647690
#SPJ3
Helium gas has a molar mass of 4 g/mol. oxygen gas has a molar mass of 32 g/mol. how much faster or slower would helium effuse than oxygen from a small opening
Answers
r₁ / r₂ = [tex] \sqrt{M2 / M1} [/tex]
Where,
r₁ = Rate of Helium
r₂ = Rate of Oxygen
M₂ = Molar mass of Oxygen = 32 g/mol
M₁ = Molar mass of Fluorine = 4 g/mol
Putting values,
r₁ / r₂ = [tex] \sqrt{32 / 4} [/tex]
r₁ / r₂ = [tex] \sqrt{8} [/tex]
r₁ / r₂ = 2.82
Result:
Helium gas effuses 2.82 times faster than Oxygen gas.
Which statement is true regarding methane and ammonia?
Answers
1) Methane molecules show hydrogen bonding.
2) Ammonia molecules show hydrogen bonding.
3) Methane has stronger hydrogen bonding than ammonia.
4) Both the compounds do not show hydrogen bonding.
5) Both the compounds have strong hydrogen bonding.
Answer:
Correct answer is Option-2 (Ammonia molecules show hydrogen bonding).
Explanation:
Hydrogen bond interactions are formed when a partial positive hydrogen atom attached to most electronegative atom of one molecule interacts with the partial negative most electronegative element of another molecule. So, in Ammonia hydrogen gets partial positive charge as nitrogen is highly electronegative. While the C-H bond in Methane is non-polar and fails to form hydrogen bond interactions.
Malonic ester (diethyl malonate) is treated successively with sodium ethoxide (1 eq.), ethyl bromide, potassium tert-butoxide, isobutyl chloride, hot aqueous naoh, hcl, and heat. what is the final product?
Answers
The resulting enolate undergoes SN² reaction with Ethyl Bromide.
The resulting product again on treatment with Potassium tertiary Butoxide gives corresponding Enolate.
This second enolate on treatment with Isobutyl Chloride undergo SN² reaction.
At last treatment with NaOH (aq) and HCl at high temperature yield 2-Ethyl-4-methylpentanoic Acid.
Final answer:
Malonic ester synthesis converts alkyl halides to carboxylic acids with two additional carbons.
Explanation:
Malonic ester synthesis involves a series of reactions converting an alkyl halide into a carboxylic acid with two additional carbons. The final product after treating malonic ester successively with sodium ethoxide, ethyl bromide, potassium tert-butoxide, isobutyl chloride, hot aqueous sodium hydroxide, hydrochloric acid, and heat would be a carboxylic acid with a methyl group attached.
Define solubility (in science)
Answers
Which formula represents an organic compound?cah2c4h8h2o2p2o5?
Answers
C₄H₈ is hydrocarbon, organic compound consisting only of carbon and hydrogen.
CaH₂ (calcium hydride) is alkaline earth hydride, inorganic compound.
H₂O₂(hydrogen peroxide) is pale blue, clear, inorganic liquid.
P₂O₅ (phosphorus pentoxide) is white, crystalline solid inorganic compound.
Final answer:
C4H8 is the formula that represents an organic compound among the given options because it contains both carbon and hydrogen atoms.
Explanation:
To determine which formula represents an organic compound, we must identify a compound containing carbon (C) with some hydrogen (H). Typically, organic compounds have carbon-hydrogen bonds and often contain other elements like oxygen, nitrogen, sulfur, and phosphorus.
Looking at the options provided:
CAH2 - Calcium hydride, an inorganic compound.
C4H8 - This is a hydrocarbon with four carbon atoms and eight hydrogen atoms, which is characteristic of an organic compound.
H2O2 - Hydrogen peroxide, an inorganic compound.
P2O5 - Diphosphorus pentoxide, an inorganic compound.
Therefore, C4H8 is the formula that represents an organic compound, as it consists of carbon and hydrogen atoms, meeting the criteria for organic chemistry.
What is the lowest possible value of n for a d atomic orbital?
Answers
The principal quantum number (n) is one of four quantum numbers which are assigned to each electron in an atom to describe that electron's state.
The principal quantum number shows the most probable distance of the electrons from the nucleus.
For n=3, there are 3 orbitals: 3s, 3p and 3d.
Calculate the energy transferred in joules when 29.5g of liquid water decreases from 14c to 0.0c
Answers
Q(heat energy) = M(mass) x C (specific heat capacity ) x delta T(change in temperature
delta T = 0. 0c- 14 c = -14 c
M= 29.5 g
C of water is always = 4.18 j/g/c
= 29.5 g x -14 c x 4.18 j/g/c =-1726.34 joules are needed when 29.5 g of liquid water decrease from 14 c to 0.0 C
What body of water is located between 30°N and 40°N latitude of africa
Answers
Final answer:
The Mediterranean Sea is the body of water between 30°N and 40°N latitude of Africa, bordering countries such as Egypt, Libya, and Tunisia.
Explanation:
The body of water located between 30°N and 40°N latitude of Africa is the Mediterranean Sea. This sea is situated to the north of the African continent and it borders several African countries including Egypt, Libya, and Tunisia within the specified latitudinal range. To its north are southern European countries, and to the east, it connects with the Middle East. The Nile River, one of the longest rivers in the world, empties into the Mediterranean Sea after flowing north through Egypt.
What is the [pb2+] in a solution made by adding 100 g of pbcl2(s) (mm = 278.1 g/mol) to a 5.4 m solution of nacl and allowing it to come to equilibrium? ignore any changes to solution volume due to the addition of pbcl2(s). once solution reaches equilibrium, it is noticed that some solid pbcl2 remains undissolved. the ksp for pbcl2 is 1.6 × 10−5?
Answers
Initially 0 5.4 M
Change -x + x + 2x
Equilibrium x 5.4 + 2x
Ksp = [Pb²⁺] [Cl⁻]²
1.6 x 10⁻⁵ = x (5.4 + 2x)²
since x <<<< 5.4 so 2x + 5.4 = 5.4
1.6 x 10⁻⁵ = x (5.4)²
x = 5.48 x 10⁻⁷
[Pb²⁺] = 5.48 x 10⁻⁷ M
Write a balanced equation for the combustion of propane. (be sure to include states of matter in your equation.)
Answers
What is the percent of MgSO4 in magnesium sulfate heptahydrate?
48.83 %
51.17 %
95.43 %
86.98 %
Answers
Molecular weight of MgSO4 is = 120.36 g
Hence, per cent of MgSO4 present in MgSO4.7H2O is,
=[tex] \frac{\text{Molecular weight of MgSO4}}{\text{Molecular weight of MgSO4.7H2O}} [/tex] X 100
= [tex] \frac{120.36}{246.47} [/tex] X 100
= 48.83 %
Answer:
48.83
Explanation:
on edge
write the proper word equation to express the following chemical reaction: 3Li (s) + AuCI3 (aq) -> 3LiCI (aq) + Au(s)
Answers
3 mol of solid lithium reacts with 1 mol of aqueous gold trichloride to form 3 mol of aqueous lithium chloride and 1 mol of solid gold.
this is a single displacement reaction.
Li is placed above Au in the reactivity series. Therefore Li is more reactive than Au. Since Li is more reactive than Au it can displace Au from the compound AuCl₃.
Therefore its called a single displacement since Li displaces Au from its compound and takes the place of Au and make a new compound AuCl₃.
How many different isomers can be derived from ethylene if two hydrogen atoms are replaced by a fl uorine atom and a chlorine atom? draw their structures and name them. indicate which are structural isomers and which are geometric isomers?
Answers
THREE different isomers can be derived from ethylene if two hydrogen atoms are replaced by a fl uorine atom and a chlorine atom.
Explanation:
When two Hydrogen atoms in ethylene (C₂H₄) are replaced with Fluorine and Chlorine atom then the new molecular formula is C₂H₂FCl.
Compounds having same Molecular formula but different structural formula are called as Isomers.
First Isomer of C₂H₂FCl is 1-chloro-1-fluoroethene, in which F and Cl at geminal position (attached to same Carbon atom).
Other two Isomers are Geometrical Isomers of 1-chloro-2-fluoroethene, in which F and Cl at different carbon atom and having different position is space. The one in which both F and Cl at opposite side forms (trans)-1-chloro-2-fluoroethene and the one in which both are in same side is called as (cis)-1-chloro-2-fluoroethene.
A 50.0-ml volume of 0.15 m hbr is titrated with 0.25 m koh. calculate the ph after the addition of 14.0 ml of koh. express your answer numerically.
Answers
To find the pH after adding 14.0 mL of 0.25 M KOH to 50.0 mL of 0.15 M HBr, calculate the excess HBr and then use its concentration to determine the pH, assuming HBr dissociates completely as it's a strong acid.
Explanation:To calculate the pH after the addition of 14.0 mL of 0.25 M KOH to 50.0 mL of 0.15 M HBr, we first need to determine if the reaction has reached the equivalence point. The millimoles of HBr initially present are calculated by multiplying the volume in liters by the molarity: 50.0 mL x 0.15 M = 7.5 mmol. Then, calculate the millimoles of KOH added: 14.0 mL x 0.25 M = 3.5 mmol.
Since we have more HBr than KOH, HBr is in excess and KOH is the limiting reactant. The excess amount of HBr is 7.5 mmol - 3.5 mmol = 4.0 mmol. The pH is determined by the concentration of the remaining HBr. To find this concentration, we take the remaining mmol of acid and divide by the total volume of the solution in liters (original acid solution plus the volume of KOH added).
The total volume after the addition of KOH is 50.0 mL + 14.0 mL = 64.0 mL or 0.064 L. The concentration of HBr is 4.0 mmol / 0.064 L. Now, convert mmol to mol by dividing by 1000, resulting in 4.0 x 10-3 mol / 0.064 L. Since HBr is a strong acid, it dissociates completely in water. The pH can be calculated using the formula pH = -log[H+], where [H+] is the concentration of hydronium ions, which is equal to the concentration of HBr.
Therefore, the pH is -log(4.0 x 10-3 / 0.064 L). Calculate this value to get the pH of the solution after the addition of 14.0 mL of KOH.
Learn more about pH calculation here:https://brainly.com/question/36153729
#SPJ3
The alkali metals react with the halogens to form ionic metal halides. what mass of potassium chloride forms when 5.11 l of chlorine gas at 0.943 atm and 286 k reacts with 29.0 g potassium?
Answers
Initial number of moles of Cl, n = 0.943*5.11/(0.08206 × 286) mol = 0.2053 moles.
We know the molar mass of K (potassium) = 39.0 g/mol
sooo....
The Initial number of moles of K = 29.0 g/(39.0 g/mol) = 0.7436 moles
Find the balanced equation for the reaction : 2K + Cl2 → 2KCl
Mole ratio of K:Cl = 2:1
So after the reaction, the amount of K needed = (0.2053 mol) × 2 = 0.4106 mol which is less than 0.7436 mol
This means that K is in excess but Cl completely reacts.
So we know the mole ratio is Cl:KCl = 1 : 2
Number of moles of Cl (completely) reacted = 0.2053 mol which means the number of moles of KCl formed = (0.2053 mol) × 2 = 0.4106 mol
Molar mass of KCl = (39.0 + 35.5) g/mol = 74.5 g/mol
Mass of KCl formed = 0.4106 mol * 74.5 g/mol = 30.6 g
The mass of potassium chloride formed is 31.5 g
The number of moles of chlorine gas is obtained from the ideal gas equation;
P = 0.943 atm
V = 5.11 l
T = 286 K
n = ?
R = 0.082 atm L K-1mol-1
From;
PV = nRT
n = PV/RT
n = 0.943 atm * 5.11 l/0.082 atm L K-1mol-1 * 286 K
n =4.819 /23.452
n = 0.21 moles of Cl2
Number of moles of K = mass/molar mass = 29.0 g/39 g/mol = 0.74 moles
Equation of the reaction is;
2K + Cl2 ----> 2KCl
Since the reaction is 2:1
1 mole of Cl2 reacts with 2 moles of K
0.21 moles of Cl2 reacts with 0.21 * 2/1 = 0.42 moles of K
This means that K is the reactant in excess.
1 mole of Cl2 yields 2 moles of KCl
0.21 moles of Cl2 yields 0.21 * 2/1 = 0.42 moles of KCl
Molar mass of KCl = 75 g/mol
Mass of KCl = 0.42 moles of KCl * 75 g/mol
Mass of KCl = 31.5 g of KCl
Learn more: https://brainly.com/question/9743981
Why is the molar solubility of silver chloride lower in an aqueous solution of silver nitrate than in pure water?
Answers
Chemical reaction (dissociation) of silver chloride in water:
AgCl(s) → Ag⁺(aq) + NO₃⁻(aq).
Chemical reaction (dissociation) pf silver nitrate in water:
AgNO₃ → Ag⁺(aq) + NO₃⁻(aq).
The coolest and dimmest space objects emit radiation of longer wavelengths than those we can see. A detector for which type of electromagnetic radiation is most suitable to study cool dim stars?
Answers
Explanation:
1) Remember the relation between the wavelength and the frequency: they are inversely related. The longer the wavelength the higher the frequency.
2) Infrared radiaton is the electromagnetic radiation with longer wavelength than the visible light and is next to it in the spectrum.
3) Infrared detectors use the properties of some materials to detect the infrared light (waves) either by their effect in the temperature or by capturing the photons emitted by the object analyzed.
4) The effects that are most used to analyze the radiaton are 1) that the change of temperature induces changes in resistance (thermal detectors) and 2) the photons excite the atoms (photodetectors).
Answer:
infared detectors
Explanation:
Ionic bonds are stronger, and one atom gives an electron to the other atom.
True
False
Answers
Write and balance a net ionic equation for the reaction between iron(ii) chloride and potassium hydroxide to form iron(ii) hydroxide and potassium chloride.
Answers
Answer: The net ionic equation is written below.
Explanation:
Net ionic equation of any reaction does not include any spectator ions.
Spectator ions are defined as the ions which does not get involved in a chemical equation. They are found on both the sides of the chemical reaction when it is present in ionic form.
The chemical equation for the reaction of iron (II) chloride and potassium hydroxide is given as:
[tex]FeCl_2(aq.)+2KOH(aq.)\rightarrow Fe(OH)_2(s)+2KCl(aq.)[/tex]
Ionic form of the above equation follows:
[tex]Fe^{2+}(aq.)+2Cl^-(aq.)+2K^+(aq.)+2OH^-(aq.)\rightarrow Fe(OH)_2(s)+2K^+(aq.)+2OH^-(aq.)[/tex]
As, potassium and hydroxide ions are present on both the sides of the reaction. Thus, it will not be present in the net ionic equation and are spectator ions.
The net ionic equation for the above reaction follows:
[tex]Fe^{2+}(aq.)+2OH^-(aq.)\rightarrow Fe(OH)_2(s)[/tex]
Hence, the net ionic equation is written above.
Iron(II) chloride reacts with potassium hydroxide to form iron(II) hydroxide and potassium chloride. The net ionic equation, which only includes the particles that participate in the reaction, is: Fe2+(aq) + 2 OH-(aq) → Fe(OH)2(s). Potassium and chloride ions are spectator ions and aren't included.
Explanation:The reaction between iron(II) chloride (FeCl2) and potassium hydroxide (KOH) produces iron(II) hydroxide (Fe(OH)2) and potassium chloride (KCl). The balanced chemical equation for this reaction is:
FeCl2(aq) + 2 KOH(aq) → Fe(OH)2(s) + 2 KCl(aq).
The net ionic equation only includes the ions and molecules directly involved in the reaction, which are Fe2+, Cl-, K+, and OH-. Therefore, the net ionic equation will look like this:
Fe2+(aq) + 2 OH-(aq) → Fe(OH)2(s).
The potassium ions (K+) and chloride ions (Cl-) do not participate directly in the reaction so they are not included. They are known as the spectator ions.
Learn more about Net Ionic Equation here:https://brainly.com/question/36522237
#SPJ3
Question 19 Unsaved
Which of the following is NOT one of the warning signs used to predict a volcanic eruption?
1)
changing chemistry of volcanic gas
2)
development and widening of surface cracks on the volcano
3)
earthquake activity
4)
the activity of animals
Answers
The volcanic eruption warning sign has not been the widening of the surface and cracks in the volcano. Thus, option 2 is correct.
Volcanic eruptions can be defined as the coming out of the lava and the magma from the earth's crust. The volcanic eruptions have consisted of magma along with several gases.
The change in the chemistry of the volcanic gas has been the warning sign of the eruption as there has been a change in the pressure and temperature of the gases that results in the explosion.
The volcanic eruption has been mediated by the shift in the earth's crust leading to earthquake activity.
The volcanic eruption has also been mediated with the warning sign as the activity of the animals, as some animals have been capable of listening to the waves that have been the indication of the volcanic eruption.
In the volcanic eruption, there has been no widening of the earth's surfaces or cracks in the volcano. However, this has been an alarming sign of the movement of the tectonic plate. Thus, option 2 is correct.
For more information about the volcanic eruption, refer to the link:
https://brainly.com/question/1622004
The activity of animals is not a scientific indicator for predicting volcanic eruptions, unlike seismic activity, gas emissions, and geological changes.
Explanation:The question asks which of the following is NOT a warning sign used to predict a volcanic eruption. Changing chemistry of volcanic gas, development and widening of surface cracks on the volcano, and earthquake activity are all regarded as warning signs of a potential volcanic eruption. However, the activity of animals is not considered a reliable scientific indicator for predicting volcanic eruptions. Animal behavior can be influenced by many factors, and while there are anecdotal reports of animals acting unusually before an eruption, it is not used as a primary method of prediction by volcanologists. Instead, they rely on more measurable signs like seismic activity, gas emissions, and geological changes.
Where do water and hydrochloric acid (hcl) lie on the ph scale in relation to each other?
Answers
Water has a neutral pH of 7 on the pH scale, while hydrochloric acid is a strong acid with a pH of around 1 to 2, indicating a much higher level of acidity than water.
On the pH scale, water and hydrochloric acid (HCl) lie at different points reflecting their levels of acidity. Water is neutral with a pH of 7, serving as the midpoint of the pH scale.
In contrast, hydrochloric acid is a strong acid with a pH significantly lower than 7; typically around 1 to 2 due to its high concentration of hydronium ions. The lower the pH value, the more acidic the substance is. Hence, hydrochloric acid has a much higher acidity than water.