How many ions are there in 13grms of K+ ions (k=39,L=6.0by10 raised to power23

A laboratory report is an important part of the scientific process that communicate the important work that has been done.

Your information is incomplete. Therefore, an overview of a laboratory report will be given. The laboratory report is important for future studies a d experiments.

A laboratory report is broken down intosections such as title, abstract, introduction, methods, materials, results, discussion conclusion, and references.

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Answer:

Below:

Explanation:

a)2 Na + F2 = 2 NaF

It's already balanced.

Type is synthesis.

b)H2 + I2 = 2 HI

It's balanced now.

Type's synthesis.

Option A

On products side

On reactants side

Hence balanced

Answer:

True

Explanation:

When determining rate law, the coefficients in the balanced equation are used to determine how different concentrations affect the rate.

Answer:

"They drink water when it is aivailable but can go weeks without it, they rely on morning dew and the water content of their food". they can use plants as resources to live.

Mole fraction is the ratio of the constituent moles to the total constituents. The mole fraction of sodium chloride is 0.0443.

A mole fraction is the proportion of the moles of the component in a total component present.

In 100 gm of solution 13.0 5 means, there is 13.0 gm of sodium chloride present. The mass of water is calculated as,

100 - 13.0 = 87.0 gm

Moles of sodium chloride is calculated as:

[tex]\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass} \\\\&= \dfrac{13}{58}\\\\&= 0.224 \;\rm moles\end{aligned}[/tex]

Moles of water are calculated as:

[tex]\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass} \\\\&= \dfrac{87}{18}\\\\&= 4.83\;\rm moles\end{aligned}[/tex]

Now, moles fraction is calculated by dividing moles of sodium chloride by total moles as,

[tex]\begin{aligned} \text{Mole fraction of NaCl} &= \dfrac{0.224}{0.224 + 4.83}\\\\&= 0.0443\end{aligned}[/tex]

Therefore, the mole fraction of sodium chloride is 0.0443.

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Answer: lodine solution and vinegar are both soluble

Solution is the mixture of solute and solvent. Iodine solution and vinegar solution both are soluble. Iodine and vinegar are the homogenous mixture.

A solution is a homogeneous mixture of o solutes  and solvent. Solvent is the material in which a solute dissolves to produce a homogeneous mixture. Solute is the material that dissolves in a solvent to produce a homogeneous mixture in phase

Common examples of solution are sugar in water and salt in water solutions, soda water etc. In a solution, all the components that are present as a single phase. Iodine and vinegar both molecule shows homogenous mixture.

Hence, the iodine solution and vinegar solutions are soluble, both compounds are homogenous mixture. Both are totally soluble.

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If the self ionization reaction is endothermic then it will shift on right side from equilibrium if we increase the temperature.

Endothermic reactions are those reactions in which heat or energy is absorbed by the reactants for the formation of product.

If the self ionization reaction is endothermic in nature then in this condition at the equilibrium if we increases the temperature then the formation of ions increases as a result of the shift of the reaction towards the right side.

Hence, by increasing the temperature we can predict whether the reaction is endothermic or not.

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the 2nd one is correct

The option that would most likely increase the rate for a more contentrated potassium hydrogene

:) hope this helps

using a more concentrated potassium hydroxide solution
Concentration is one of the factors that affect the rate of reaction

The higher the concentration, the higher the reaction rate

A balanced equation contains the same number of atoms of the element on both sides of the equation. The statement is true.

A balanced equation is the representation of the molecules or the compound of the reactants on the left and the product on the right side of the reaction equation with their stoichiometry coefficients and symbols.

The number of the atoms of the molecules on the reactant side and the product side of the same element must be equal so, that the law of the conservation of mass is justified.

Therefore, the statement is true.

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Ionic compounds are substances that are made up of ions. There is no ionic formula as carbon and oxygen do not form an ionic compound.

Ionic compounds are compounds that have two differently charged species that bind together. The positive metal species binds to the negative nonmetal species.

Carbon and oxygen both are nonmetals and cannot form a bond as nonmetals gain electrons and metals donates electrons for the bond formation.

Therefore, no ionic compound is present for carbon and oxygen.

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1. double replacement[two of the chemical species(B and D)exchanged positions]

2. Combustion(the reaction with oxygen produced CO2 and water; products of Combustion)

3. Single replacement(only one chemical specie[B] exchanged position)

4. Combination(the two reactants formed a single product)

5. Decomposition(a compound released two constituent products)

6. 1PbCl2 + 2AgNO3 = 1Pb(NO3)2 + 2AgCl. it is a double replacement reaction since two chemical species(Chlorine(Cl) and Nitrogen(iii)oxide[NO3]) exchanged positions.

7. 1NH3 + HCL = NH4Cl. it is a combination reaction since two reactants formed a single product.

8. 2AlCl3 + 3Na2SO4 = 1Al(SO4)3 + 6NaCl. it is a double replacement reaction since two chemical species(chlorine[Cl] and sulphate[SO4]) exchanged positions.

9. 1Zn + 1S = 1ZnS. it is a combination reaction since two reactants formed a single product.

10. 1Al2(SO4)3 + 3BACl2 = 3BASO4 + 2ALCL3. it is a double replacement reaction since two chemical species(chlorine[Cl] and sulphate[SO4]) exchanged positions.

11. 1Al2S3 = 2Al + 3S. it is a decomposition reaction since a reactant released two constituent products.

12. 1H2SO4 + 1Fe = 1H2 + 1FeSO4. it is a single replacement reaction since one chemical specie(sulphate[SO4]) exchanged position.

13. C12H22O11 + 12O2 = 12CO2 + 11H2O. it is a combustion reaction since a reactant combined with oxygen to release carbon dioxide(CO2) and water(H2O).

14. 1Mg(OH)2 + 1H2SO4 = 1MgSO4 + 2H2O. it is a double replacement reaction since two chemical species(hydroxide[OH] and sulphate[SO4]) exchanged positions.

15. 2NaOH + 1CuSO4 = Na2SO4 + Cu(OH)2. it is a double replacement reaction since two chemical species(hydroxide[OH] and sulphate[SO4]) exchanged positions.

16. 1C4H12 + 7O2 = 6H2O + 4CO2. it is a combustion reaction since a reactant combined with oxygen to release carbon dioxide(CO2) and water(H2O).

17. 4Fe + 3O2 = 2Fe2O3. it is a combination reaction since two reactants formed a single product.

18. 1Mg3(PO4)2 + 3H2 = 3Mg + 2H3PO4. it is a single replacement reaction since one chemical specie(phosphate[PO4]) exchanged position.

19. 2NH4NO3 = 2N2O + 4H2O. it is a decomposition reaction since a reactant released two constituent products.

20. 1Cl2 + 2KBr = 2KCl + 1Br2. it is a single replacement reaction since one chemical specie(potassium[K]) exchanged position.

Assuming that both cases describe hydrogen‑like atoms with one electron, More energy is emitted or absorbed for case 2. The correct option is D.

The energy of the electron decreases as it changes levels, and emission of photons happens in the atom.

With the electron moving from a higher to a lower energy level, the photon is emitted. The photon's energy is the same as the energy lost by an electron moving to a lower energy level.

Thus, the correct option is D, More energy is emitted or absorbed for case 2.

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PV=nRT

n = mole = 2.1 g : 32 g/mole = 0.065

T = 13 + 273 = 286 K

V = nRT/P

V = (0.065 x 0.08205 x  286)/0.1

V = 15.253 L

Hydrogen is the element with atomic number one. The representation of the hydrogen molecule with a double bond is incorrect.

A double bond is a type of chemical bond that involves two pairs or four bonding electrons of the atom in a molecule. They are stronger and shorter bonds compared to single bonds.

A hydrogen molecule can never have a double bond in its molecule as it has only a single electron in its shell and cannot form a double bond due to the lack of four electrons.

Therefore, hydrogen molecules cannot form a double bond.

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What causes deep, cold currents to form in the oceans near the poles? The sinking of dense, cold water paired with high salinity.

When more products or reactants are added to a reaction that is in equilibrium, the equilibrium will shift so as to annul the effects of adding the products/reactants.

It states that when a reaction is in equilibrium and one of the constraints that affect the rates of chemical reactions is applied, the equilibrium will shift accordingly so as to annul the effects of the added constraint.

Thus, if more products are added, the equilibrium will shift to produce more reactants. If more reactants are added, the equilibrium will shift to produce more products.

Hence, what will happen to the equilibrium position depends on whether CHO2– is a reactant or product.

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Answer:

A rise in global temperatures increases the severity and likelihood of storms, floods,wildfires, droughts, and heat waves

Explanation:

no explanation please tag me as brainleast thankyou

In a neutral atom, the number of electrons equal to the number of protons

Answer:

41.25

Explanation:

I am not sure if your teacher expects you to just find specific heat yourself, but if they do answer it using as below:

Quick search shows aluminium specific heat is 0.90 J/gC.

use formula: q = mcΔT (q = heat, m= mass, c= specific heat, ΔT is temperature change)

q = mcΔT

q/(mc) = ΔT

32.3/(0.87 x 0.90) = ΔT

ΔT = 41.25 C

Answer:

Conduction, Convection, and Radiation .......

The product of the electron transport chain that reenters the krebs cycle is NAD. Details about electron transport chain can be found below.

Cellular respiration is the process by which living organisms break down food molecules in their cells.

The process of cellular respiration involves the following stages:

The electron transport chain is a series of reactions that involve the transfer of electrons from one molecule to another. NAD+ is one of the electron acceptor and products of the ETC that reenters the kreb cycle.

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Answer:

1 sigma bond and 2 pi bonds

Explanation:

A triple bond is made up of 1 sigma bond and 2 pi bonds.

Given example is that of ethyne

Answer:

1 [tex]\sigma[/tex] and 2π bonds

Explanation:

Always remember that

The general example is

N=N bond

A change to any gas in the atmosphere affects energy absorbed by the surface in the same way of green house effect.

Green house effect is a phenomena in which energy from the sun comes to the earth and the gases which are present in the atmosphere of the earth absorbs the energy from the sun and raises earths temperature.

The gases which are especially responsible for this effect are carbon dioxide, methane, nitrous oxide, ozone and vapors of water. Change in the concentration of this gases will affect the energy absorbed by the surface.

Hence, this is same like green house effect.

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Answer:

Yes,

Chemical Reactivity of metals decrease as you go left to right of the periodic table Chemical Reactivity increases as you go down the group....

Explanation:

Hope it Helps!!!

:)

Answer: You should learn the symbols for the eight most abundant elements in the Earth's crust (Oxygen (O), Silicon (Si), Aluminum (Al), Calcium (Ca), Iron (Fe), Magnesium (Mg), Sodium (Na), and Potassium (K) .

Explanation:

Answer:

1 H2SO4+ 1 MgCl2 = 1 MgSO4+ 2HCl

Answer:

neutral   acidic   basic      basic

Explanation:

>7 = acid    7  neutral      >7  basic