Answer:
[tex]20.33\times 10^{26}[/tex] atoms
Explanation:
Given that,
Given mass = 13200 g
Molar mass of potassium = 39.0983 g/mol
Let there are n number of moles. It is equal to mass divided by molar mass. It is equal to :
[tex]n=\dfrac{13200}{39.0983 }\\\\=337.61\ \text{mol}[/tex]
Let there are x atoms in 13200 g of potassium (k). It can be calculated :
[tex]x=n\times N_A\\\\=337.61\times 6.023\times 10^{23}\\\\=20.33\times 10^{26}[/tex]
So, there are [tex]20.33\times 10^{26}[/tex] atoms.
How does the potential energy of a double bond (like oxygen-oxygen) compare to a weak interaction or single bond (like argon-oxygen)?
Answer:
Potential energy in a double bond is going to be higher than the potential energy of a single bond due to the force needed to break a double bond as opposed to a single. Single bond is weaker, which means less energy is needed to break it. Double bonds are stronger, requiring more energy to break the bond.
Explanation:
- In each of the following sets of elements, which
element shows the least ability to gain or lose
electrons?
a. Cs, Rb, Na
b. Ba, Ca, Be
c. F, Cl, Br
d. O, Te, S
Answer:
a. Cs, Rb, Na
Explanation:
Electronegativity is the ability of an element to lose or gain electrons. It is expressed as a number that measures the relative tendency with which atoms of the element attract valence electrons in a chemical bond.
Across the periodic table, electronegativity increases except for the noble gasesIt decreases down the groupGroup 1 elements have the least electronegativityCs, Rb and Na all belongs to this groupThey are called the alkali metalsThey are the most electropositive group on the periodic table.How many moles of HCL are in 18 grams? (Use the molar mass to convert miles to grams. Round you answer to 2 decimal places.)
Answer:
0.49 mol HCl
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
18 g HCl
Step 2: Identify Conversions
Molar Mass of H - 1.01 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar mass of HCl - 1.01 + 35.45 = 36.46 g/mol
Step 3: Convert
[tex]18 \ g \ HCl(\frac{1 \ mol \ HCl}{36.46 \ g \ HCl} )[/tex] = 0.493692 mol HCl
Step 4: Check
Round our answer to 2 decimal places.
0.493692 mol HCl ≈ 0.49 mol HCl
Answer:
0.49 mol
Explanation:
mol=given mass /molecular mass : = 18/36.5 =0.49What organic product would you expect from the reaction of ethylmagnesium bromide (CH3CH2MgBr) with H2O.
Answer:
It would produce ethane (CH₃CH₃)
Explanation:
Ethylmagnesium bromide (CH₃CH₂MgBr) is a Grignard's reagent.
It is a highly reactive substance, and as any alkylmagnesium bromide
(R-CH₂MgBr) it reacts with water to produce an alkane (R-CH₃). R stands for any carbon structure bonded to that functional group.
how you will separate pure water from a solution of water and salt
GIVEING BRAINLIST
ATP is a(1 point)
storable form of energy.
usable form of energy.
form of energy that can be used and stored.
form of energy that can be stored and released as heat.
Answer:
ATP is a stored form of energy
Explanation:
it is the main source of this
the burning of fossil fuels produces what kind of energy
Answer:
When fossil fuels are burned carbon and hydrogen react with oxygen in air to carbon dioxide (CO2) and water (H2O). During this reaction heat is released which further amplifies the reaction. Electricity is generated by transforming mechanical energy (heat) to electrical energy in a turbine or generator.
Explanation:
A single atom with a unique number of protons
Answer:
One atom of that element like helium neon and other Noble gases
Explanation:
Answer:
Please make sure to re-write this on your own so your teacher doesn't think you cheating!Explanation:
The number of protons in the nucleus of an atom determines an element's atomic number. In other words, each element has a unique number that identifies how many protons are in one atom of that element. An example is all hydrogen atoms, and only hydrogen atoms, contain one proton and have an atomic number of 1.
What type of reaction mechanism accounts for the reaction of an alkene with aqueous acid to give an alcohol
Answer: Electrophilic addition reaction
Explanation:
Alkenes are compounds which have at least one double bond between the carbon atoms in the molecule. This is an indication of a shortage of hydrogen atoms. The compound is said to be unsaturated. As an unsaturated compound alkene undergoes the following reaction:
-- Combustion reaction
-- Hydrogenation reaction
-- Addition reaction.
The addition reaction of alkenes occur due to the presence of pi electrons in which an electrophile attacks the carbon-carbon double bond to form the addition products. An electrophile is a molecule that has the affinity to react with other molecules containing a donatable pair of electrons.
A typical example of reaction between alkene and acid is in the decolourisation of acidified potassium tetraoxomanganate(VII) with ethene. The oxygen supplied to the reaction breaks the double bond to yield ethane 1,2 diol ( an alcohol).
The reaction of an alkene with the acid has been performed with the carbocation intermediate formation, followed by the nucleophilic substitution reaction.
The alkenes have been the hydrocarbons with the presence of one double bond in the structure. The double bond has been consisted of the pi electrons.
The alkene has been bonded with the pi-electron, thus in the chemical reaction the pi bond-breaking results in the partial negative and positive charge to the carbon atoms. The negative OH group has been the nucleophile that is attracted by the negatively charged carbon atom, and the bond formation results in the alcohol.
The reaction for an alkene with acid has been given in the image attached.
Thus, the reaction of an alkene with the acid has been performed with the carbocation intermediate formation, followed by the nucleophilic substitution reaction.
For more information about the reaction mechanism, refer to the link:
https://brainly.com/question/24924720
Scientific notation.
Answer:
23.1 x 10^11
Explanation:
(4.2x5.5) x (10^9x10^2)
23.1 x 10^11 (Add the exponents, and multiply the decimals.)
I hope this helped! :)
What is the answer? Please
Answer:
Carbon Dioxide
Explanation:
Because plants take in Carbon Dioxide, then let out Oxygen
Explain why hydrogen can only have 2 valence electrons around it when it bonds to other items. What is the maximum number of bonds hydrogen will form?
Answer:
In first shell only 2 electrons are present in hydrogen only one electron is present in valence shell. To complete its duplet hydrogen can share lose or gain only one electron to form chemical bond.
Hydrogen can form only one bond.
Explanation:
Bohr's model was correct in assigning energy levels to electrons.
Answer:
yes that is true........
HELPPPP give me an example of thermal energy and describe what is happening at particle level.
Answer:
Thermal energy (also called heat energy) is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other. The energy that comes from the temperature of the heated substance is called thermal energy.
Explanation:
will this help you
Calculate the mass of ammonia (NH3) that contains a billion (1.00 * 10^12) hydrogen atoms.
Answer:
The mass of ammonia (NH3) that contains [tex]1.00 \times 10^12[/tex] hydrogen atoms is [tex]9.4\times 10^{-12}[/tex] g.
Explanation:
As [tex]6.022\times 10^{23}[/tex] atoms of hydrogen = 1 mole of the hydrogen atom
Therefore, [tex]10^{12}[/tex] atoms of hydrogen [tex]= \frac{1}{6.022 \times 10^{23}}\times 10^{12}=1.66\times 10^{-12}[/tex] moles of the hydrogen atom.
Now, there are 3 moles of hydrogen atoms in 1 mole of ammonia [tex](NH_3)[/tex].
As the mass of 1 mole of ammonia is 17g, so
when there are 3 moles of hydrogen atoms, then the mass of ammonia = 17 g
Therefore, when there are [tex]1.66\times 10^{-12}[/tex] moles of hydrogen atoms, then the mass of ammonia [tex]= \frac{17}{3}\times 1.66\times 10^{-12}=9.4\times 10^{-12[/tex] g.
Hence, the mass of ammonia [tex](NH_3)[/tex] that contains [tex]1.00 \times 10^12[/tex] hydrogen atoms is [tex]9.4\times 10^{-12}[/tex] g.
Which of the following are products of the reaction listed? Zn + 2HCI
ZnCl2 + H2
H2
НСІ
ZnCl2
Zn
Answer:
ZnCl2
H2
Explanation:
The products of the given reaction is:
ZnCl₂ and H₂
The two species are the products of the chemical combination
This reaction is a single displacement reactionBecause Zn is more reactive, it displaces hydrogen from the acidThis forms a hydrogen gasWe know this because Zn is higher in the activity series.Calculate the pH of a titration at the point when 15.0 mL of 0.15 M NaOH is added to 30.0 mL 0f 0.20 M HNO.
Answer:
The correct answer is 1.10.
Explanation:
Based on the given information, the molarity of the NaOH is 0.15 M, that is, 0.15 moles per liter of the solution.
Now the moles present in the 15 ml of the solution will be,
0.015 × 0.15 = 2.25 × 10⁻³ moles of NaOH or 0.0025 moles of NaOH
Now, molarity of the HNO₃ given is 0.20 M, which means 0.2 moles per liter of the solution.
Now the moles present in the 30 ml of the solution will be,
0.030 × 0.2 = 0.006 moles of HNO₃
Now the complete disintegration of acid and base will be,
NaOH (aq) (0.025 moles) ⇔ Na⁺ (aq) (0.025) + OH⁻ (aq) (0.025 moles)
HNO₃ (aq) (0.006 moles) ⇔ H⁺ (0.006 moles) + NO₃⁻ (aq) (0.006 moles)
Now the additional Hydrogen ions at titration point is,
= 0.006 - 0.0025 = 0.0035 moles of H+
Now the concentration of H+ ions in the 45 ml of the solution will be,
= 0.0035/45 × 1000
= 0.078 M
pH = -log[H⁺] = -log [0.078]
= 1.10
what makes up from zero to four percent of the atmosphere?
write net ionic equations for the reaction, if any, that occurs when aqueous solutions of the following are mixed. a. ammonium sulfate and barium nitrate
Answer:
SO₄²⁻(aq) + Ba²⁺(aq) ⇒ BaSO₄(s)
Explanation:
Let's consider the molecular equation that occurs when aqueous solutions of ammonium sulfate and barium nitrate are mixed.
(NH₄)₂SO₄(aq) + Ba(NO₃)₂(aq) ⇒ BaSO₄(s) + 2 NH₄NO₃(aq)
The complete ionic equation includes all the ions and insoluble species.
2 NH₄⁺(aq) + SO₄²⁻(aq) + Ba²⁺(aq) + 2 NO₃⁻(aq) ⇒ BaSO₄(s) + 2 NH₄⁺(aq) + 2 NO₃⁻(aq)
The net ionic equation includes only the ions that participate in the reaction and the insoluble species.
SO₄²⁻(aq) + Ba²⁺(aq) ⇒ BaSO₄(s)
3) What will be the molecular mass of gas,11.2l of which at NTP weight 14 gm?
Answer:
30 g/mol
Explanation:
Step 1: Given data
Volume of the gas at NTP: 11.2 LMass of the gas: 14 gStep 2: Calculate the moles corresponding to 11.2 L of gas
At normal temperature and pressure (1 atm, 293.15 K), 1 mol of a gas has a volume of 24.05 L.
11.2 L × 1 mol/24.05 L = 0.466 mol
Step 3: Calculate the molecular mass of the gas
0.466 moles of the gas weigh 14 g. The molecular mass is:
M = 14 g/0.466 mol = 30 g/mol
Why doesn't grassland biome naturally support trees
What types of geological events can the following interactions produce?
Divergent boundaries:
Convergent boundaries:
Transform boundaries
Answer:
divergent boundaries- volcanic activity, shallow earthquakes, new sea floor.
convergent boundaries- earthquakes, volcanoes, formation of mountains.
transform boundaries- earthquakes, crustal deformation
Explanation:
(hope this helped!!)
Which statement describes how the binary ionic compound KBr is named?
Which statement describes how the binary ionic compound KBr is named? The metal is named first, and the name is unchanged. Which of these is a property of a substance that is composed of atoms that are held together by ionic bonds?
B. The metal is named first and the name is unchanged.
Lithium hydroxide is used in alkaline batteries. Calculate the molarity of a solution prepared by dissolving 1.495 moles of LiOH in enough water to give a final volume of 750. mL.
1) 1.99 M
2) 1.50 M
3) 1.12 M
4) 0.502 M
5) 0.00199
Answer:1)1.99 M
Explanation:
Molarity is given as = moles solute/Liter solution
The solute which is LiOH is already given in moles as 1.495 moles
Given that solution is 750 mL, we convert to liters.
Liters of the solution= mL of the solution x (1 L/1000 mL)
750 mL x (1 L/1000 mL)
0.75 L
Molarity = moles solute/Liter solution
Molarity = 1.495 moles of LiOH/0.75 L of solution
Molarity = 1.99M
The molarity of this solution is 1.99M (moles per liter).
easons for the dense packing in metals
Explanation:
Typically, only one element is present, so all atomic radii are the same. -Metallic bonding is not directional. -Nearest neighbor distances tend to be small in order to lower bond energy.
if T1=454 K and T2=356 K atm and V1=101.85 mL. then what is V2? please help asap!!!
Answer:
opp
Explanation:
(SK015) Naturally occurring argon consists of thre isotopes , argon-36, argon-38, argon-40 in the ratio of 4.86: 1 : 1423 i) Calculate the percentage composition of the three isotopes. ii) Calculate the relative atomic mass of argon to four significant figures.
Answer:
What
Explanation:
Can u explain
Chlorite anion was exposed to strong radiation and had 2 successive electrons removed, creating a chlorite cation. What is the molecular geometry on this chlorite cation?
Answer:
bent
Explanation:
The chlorite ion has been pictured in the image attached with its two main resonance contributors.
The ion has four regions of electron density as shown. On the basis of the VSEPR theory, we expect a tetrahedral geometry.
However, the ion is bent due to the effect of the lone pairs on chlorine which is the central atom in the ion. This distorts the bond angle of the ion hence the ion has a bent molecular geometry.
If 45.0 mL of ethanol (density =0.789g/mol) initially at 6.0°C mix with 45.0 mL of water (density =1.0 g/mol) initially at 28.0°C in an insulated beaker, what is the final temperature of the mixture, assuming that no heat is lost? (CetOH =2.42 J/G C)
The final temperature of the mixture : 21.1° C
Further explanationThe law of conservation of energy can be applied to heat changes, i.e. the heat received / absorbed is the same as the heat released
Q in(gained) = Q out(lost)
Heat can be calculated using the formula:
Q = mc∆T
Q = heat, J
m = mass, g
c = specific heat, joules / g ° C
∆T = temperature difference, ° C / K
Q ethanol=Q water
mass ethanol=
[tex]\tt mass=\rho\times V\\\\mass=0.789\times 45=35.505~g[/tex]
mass water =
[tex]\tt mass=1~g/ml\times 45~ml=45~g[/tex]
then the heat transfer :
[tex]\tt 35.505\times 2.42~J/g^oC\times (t-6)=45\times 4.18~J/g^oC\times (28-t)\\\\85.922t-515.533=5266.8-188.1t\\\\274.022t=5782.33\rightarrow t=21.1^oC[/tex]
What is the molarity when 0.181 moles of MgNO3)2 are dissolved in enough water to make 0.750 L solution?
Answer:
Molarity = 0.24 M
Explanation:
Given data:
Number of moles of Mg(NO₃)₂ = 0.181 mol
Volume of solution = 0.750 L
Molarity of solution = ?
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
by putting values,
Molarity = 0.181 mol / 0.750 L
Molarity = 0.24 M