How many grams of La(IO3)3 can be dissolved in 1000 mL of a 0.100 M KIO3 solution at 25 oC? Use activities for this calculation. Activity coefficients can be found in Table 12-1 of your textbook. Just need the last part please!
The solubility product constant for La(103)3 is 1.00×10-11 at 25 °C. What is the molar concentration of 103 ions in a saturated solution of La(103)3? Assume an ideal solution at 25°C.

Answer:

Neutrons,Electrons and Protons I think.

Answer:

sana all may brainnnnnnnnnnnnn

According to the hypothesis of ionization when Swedish scientist Svante Arrhenius, also known as Arrhenius recommended the notion of bases and acids in 1884.

The Arrhenius was theory of base and acid formation was developed by The young man August Arrhenius the (1959–1927), whom drew on the findings and research of the people who went after him. in this theory, bases are things that "deliver hydroxy the anions to the solution," while acids are things that "deliver hydrogen anions to the solution."

The Brnsted-Lowry Acid and Base Hypothesis Because they combine with the hydrogen ions of acid to generate water, oxidizing ions are still considered bases. An acid reacts with the liquid molecules by giving it a proton, which allows liquid water molecule to generate ionized hydrogen in solution.

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Density=0.702g/cm^3

Volume=32cm^3

\(\\ \rm\longmapsto Density=\dfrac{Mass}{Volume}\)

\(\\ \rm\longmapsto Mass=Density\times Volume\)

\(\\ \rm\longmapsto Mass=0.702(32)\)

\(\\ \rm\longmapsto Mass=22.464g\)

Answer:

Out of the above mixtures, seawater, air, and soda water are solutions.

hope this helps :3

Rapid cooling of a saturated solution produce small crystals, but slow cooling produce large crystals because temperature affects crystal size.

Saturated solution is the solution in which maximum amount of solvent is dissolved. Any further solute added will settle to the bottom of the container as crystals.

The amount of solute which dissolves in a solvent to form a saturated solution depends on various factors.

1. Temperature

2. Pressure

3. Chemical composition

The quicker a substance cools, the smaller the crystals which form because the molecules of that substance have less time to organize into a definite, ordered pattern.

Thus, rapid cooling of a saturated solution produce small crystals, but slow cooling produce large crystals because temperature affects crystal size.

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Explanation:

(1) heavier materials sink to the bottom of the mixture

(2)use a filter funnel and filter paper (filtration method)

(3) ferromagnetic materials (typically metals)

Answer:

it's volume also decrease

Answer:

Based on the octet rule, how many electrons do atoms want to have? -Ans: D (eighteen)

Answer:

Number of moles = 2.72 mol

Explanation:

Given data:

Number of moles of H₃PO₄ present = ?

Molarity of solution = 18.1 M

Volume of solution = 150.0 mL (150/1000 = 0.15 L)

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,

18.1 M = number of moles / 0.15 L

Number of miles = 18.1 M × 0.15 L

Number of moles = 2.72 mol

Answer:gold iron and uranium

Explanation:

Answer:

iron, density: 7.8 g/cm³

aluminum, density: 2.7 g/cm³

silver, density: 10.5 g/cm³

lead, density: 11.3 g/cm³

Explanation:

other ones wrong

Answer:

Sublimation, the dry ice changes to a gas, solid to gas is sublimation

Answer:

its c

Explanation:

Answer:Hey there

Here are 50 simple balanced chemical equations...

1) 2Fe2O3+3C--->4Fe+3CO2

2)H2SO4+

CaCO3--->CaSO4+H2CO3

3) 2H2+02--->2H20

4) CH3COOH+

C2H5OH ---> CH3COOC2H5

+H2O

5) 1 AgNO3 + 1 LiOH --> 1 AgOH + 1 LiNO3

6) CH4+2O2--->CO2+2H2O.

7) Sn+2H2SO4-->SnSO4+2H2O

+SO2

8) CuO+H2SO4--->CuSO4+H2

9) Mg3N2 + 3H2O ---> 3MgO + 2NH3

10) N2 + O2 ---> 2 NO

11) 2 CH4 + 3 O2 ---> 2 CO + 4 H2O

12) 6 CO2 + 6 H2O ---> C6H12O6 + 6 O2

13) 2 AgI + Na2S ---> Ag2S + 2 NaI

14) Ba3N2 + 6 H2O --->

3 Ba(OH)2 + 2 NH3

15) 4 FeS + 7 O2 --->2 Fe2O3 + 4 SO2

16) PCl5 + 4 H2O ---> H3PO4 + 5 HCl

17) 3 CaCl2 + 2 Na3PO4--->Ca3

(PO4)2 + 6 NaCl

18) 2 As + 6 NaOH --->2 Na3AsO3 + 3 H2

19) 12 HClO4 + P4O10 ---> 4 H3PO4 + 6 Cl2O7

20) 10 KClO3 + 3 P4 ---> 3 P4O10 + 10 KCl

21) SnO2 + 2 H2 ---> Sn + 2 H2O

22) 3 KOH + H3PO4 ---> K3PO4 + 3 H2O

23) 3 Hg(OH)2 + 2 H3PO4 ---> Hg3(PO4)2 + 6 H2O

24) 2 KNO3 + H2CO3 ---> K2CO3 + 2 HNO3

25) Na3PO4 + 3 HCl ---> 3 NaCl + H3PO4

26) TiCl4 + 2 H2O ---> TiO2 + 4 HCl

27) C2H6O + 3 O2 ---> 2 CO2 + 3 H2O

28 4 NH3 + 5 O2 ---> 4 NO + 6 H2O

29) B2Br6 + 6 HNO3 ---> 2 B(NO3)3 + 6 HBr

30) 8 CO + 17 H2 ---> C8H18 + 8 H2O

31) 4 NH4OH + KAl(SO4)2·12H2O ---> Al(OH)3 + 2 (NH4)2SO4 + KOH + 12 H2O

32) 2 Fe + 6 HC2H3O2 ---> 2 Fe(C2H3O2)3 + 3 H2

33) N2+3H2--->2NH3

34) N2 + 3H2 ---> 2NH3

35) Al2O3+3H2SO4--->Al2

(SO4)3 +3H2O

36) HCl+NH3--->NH4Cl

37) 2Na + 2H2O = 2NaOH + H2

38) C6H12O6--->6C+6H2O

39) CuO+H2SO4--->CuSO4+H2

40) COH12O6--->2CO2

+2C2H5OH

41) FeCl3+Fe2O3--->3FeOCl

42) NaCl+AgNO3--->NaNO3

+AgCl

43) HCl+NH3--->NH4Cl

44) 2Al+6HCl--->2AlCl3+3H2

45) Ca + 2HCl = CaCl2 + H2

46) CaCO3 + H2SO4 = CaSO4 + H20 + CO2

47) 3H2SO4 + 2Fe ---> Fe2(SO4)3 + 3H2

48) Mg3N2 + 3H2O ---> 3MgO + 2NH3

49) CH4+ O2 ---> CO2 + H2O

50) Cl2 + SO2 + H2O ---> HCl + H2SO4

If I have repeated any equation, please do tell me.

Hope this helps you dear!!

Explanation:

Answer:

The extract is boiled with FeSO4 and acidified with concentrated H2SO4. The appearance on Prussian blue colour indicates the presence of nitrogen

Explanation:

PLS mark it brainliest

a. NH3 (Ammonia): In a 1.0L container of NH3 at Standard Temperature and Pressure (STP), intermolecular forces such as hydrogen bonding would be exerted.

b) 1.0L container of CHCl3 at STP, dipole-dipole interactions (along with London dispersion forces) would be present.

a. NH3 (Ammonia):

In a 1.0L container of NH3 at Standard Temperature and Pressure (STP), intermolecular forces such as hydrogen bonding would be exerted. Ammonia (NH3) molecules consist of one nitrogen atom bonded to three hydrogen atoms, forming a trigonal pyramidal shape.

Hydrogen bonding is a type of intermolecular force that occurs when a hydrogen atom is covalently bonded to an electronegative atom (in this case, nitrogen) and interacts with another electronegative atom (in this case, the nitrogen atom of a neighboring NH3 molecule).

b. CHCl3 (Chloroform):

In a 1.0L container of CHCl3 (chloroform) at STP, intermolecular forces such as dipole-dipole interactions would be exerted. Chloroform (CHCl3) molecules consist of one carbon atom bonded to three hydrogen atoms and one chlorine atom, forming a tetrahedral shape.

Dipole-dipole interactions arise due to the difference in electronegativity between chlorine and hydrogen atoms. The chlorine atom is more electronegative than hydrogen, resulting in a polar covalent bond.

While dipole-dipole interactions are present in CHCl3, it is worth noting that CHCl3 also exhibits London dispersion forces. These forces occur due to temporary fluctuations in electron distribution, creating temporary dipoles.

London dispersion forces are the weakest type of intermolecular force but still contribute to the overall intermolecular interactions in CHCl3.

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In order to find the answer we need to set the equation up first, so the reaction for photosynthesis is:

6 CO2 + 6 H2O + energy -> C6H12O6 + 6 O2

Now by checking the molar ratio between water and glucose we see that for every 6 moles of H2O we will end up having 1 mol of C6H12O6, so we have a 6:1 molar ratio, now in order to produce 0.500 we will find out by doing the following calculation:

6 H2O = 1 C6H12O6

x H2O = 0.500 C6H12O6

x = 3.00 moles of H2O are needed to produce 0.500 moles of glucose

Answer: 9000 - 1 significant figure

Explanation: Since you are multiplying, the number with the least amount of significant figures determines the number of significant figures in the answer. The number 9 has 1 significant figure and 1025 and has 4 significant figures so 9 has the fewest significant figures,  meaning your answer will be 1 significant figure.

If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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Answer:

Magnesium permanganate

Explanation:

Answer:

Magnesium Permanganate

Explanation:

The following statement is true:

Oxygen atoms always have a -2 oxidation state, unless it is in the elemental form O2 when it is 0, or in a peroxide such as H2O2 when it is -1.

This means that in most compounds containing oxygen, the oxygen atom will have an oxidation state of -2, unless it is in its elemental form (O2), in which case its oxidation state is 0. However, in peroxides such as H2O2, each oxygen atom has an oxidation state of -1.

Hg⁺ with I⁻ forms HgI

Hg⁺ with S²⁻ forms Hg₂S

Hg⁺ with CO₃²⁻ forms Hg₂CO₃

K⁺ with I⁻ forms KI

K⁺ with S²⁻ forms K₂S

K⁺ with CO₃²⁻ forms K₂CO₃

Answer:

Therefore; the wavelength of wave is 6. 9×10−8m.

Answer:

1.26*10^16Hz

Using the planck-einsten equation, you plug in the values and you should get 1.26*10^16Hz.

Yeast is a type of fungus that can ferment certain substances, meaning it breaks down sugars and converts them into alcohol and carbon dioxide. The ease with which a substance is fermented by yeast depends on a few factors, including the type of yeast being used and the composition of the substance itself.

Generally speaking, substances that contain a high amount of simple sugars are more easily fermented by yeast. This is because yeast is able to quickly and efficiently break down these sugars into alcohol and carbon dioxide. Examples of substances that are easily fermented by yeast include fruit juices, honey, and molasses.

On the other hand, substances that are more complex or contain less sugar may be more difficult for yeast to ferment. For example, yeast may have a harder time breaking down starches, such as those found in grains, without additional processing steps.

It's worth noting that different strains of yeast may also have varying levels of ability to ferment certain substances. Some strains may be better suited for fermenting certain types of beer or wine, for example, while others may be more effective at fermenting bread dough.

Overall, the ease with which a substance is fermented by yeast depends on a variety of factors, and may require some trial and error to determine the best approach for a particular substance.

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Answer:

2. Hydrochloric acid (HCL) is an acid, while sodium hydroxide (NaOH) is a base.

Explanation:

so the two labels are missing, one method to differentiate them is by mixing each reagent with a base. Let's say we mix sodium carbonate(Na2C03) which is a base with each of the reagent, the sodium carbonate will likely react with Hydrochloric acid which is an acid to form NaCl and H2O, but it will not react with sodium hydroxide which is a base.

That why, by mixing the each reagent with a base, we could help place the correct label.

Another way to place the labels correctly is, the bottle containing hydrochloric acid will be sticky while the sodium hydroxide will be slippery. It is a known fact that acids are generally sticky while bases are slippery when touched.

3. Natural Acidity of Rainwater

Explanation:

Pure water has a pH of 7.0 (neutral); however, natural, unpolluted rainwater actually has a pH of about 5.6 (acidic).[Recall from Experiment 1 that pH is a measure of the hydrogen ion (H+) concentration.] The acidity of rainwater comes from the natural presence of three substances (CO2, NO, and SO2) found in the troposphere (the lowest layer of the atmosphere). As is seen in Table I, carbon dioxide (CO2) is present in the greatest concentration and therefore contributes the most to the natural acidity of rainwater.

Gas

Natural Sources

Concentration

Carbon dioxide

CO2 Decomposition 355 ppm

Nitric oxide

NO Electric discharge 0.01 ppm

Sulfur dioxide

SO2 Volcanic gases 0-0.01 ppm

Carbon dioxide, produced in the decomposition of organic material, is the primary source of acidity in unpolluted rainwater.

NOTE TO REMEMBER: Parts per million (ppm) is a common concentration measure used in environmental chemistry. The formula for ppm is given by:

Carbon dioxide reacts with water to form carbonic acid (Equation 1). Carbonic acid then dissociates to give the hydrogen ion (H+) and the hydrogen carbonate ion (HCO3-) (Equation 2). The ability of H2CO3 to deliver H+ is what classifies this molecule as an acid, thus lowering the pH of a solution.

Nitric oxide (NO), which also contributes to the natural acidity of rainwater, is formed during lightning storms by the reaction of nitrogen and oxygen, two common atmospheric gases (Equation 3). In air, NO is oxidized to nitrogen dioxide (NO2) (Equation 4), which in turn reacts with water to give nitric acid (HNO3) (Equation 5). This acid dissociates in water to yield hydrogen ions and nitrate ions (NO3-) in a reaction analagous to the dissociation of carbonic acid shown in Equation 2, again lowering the pH of the solution.

Acidity of Polluted Rainwater

But, human industrial activity produces additional acid-forming compounds in far greater quantities than the natural sources of acidity described above. In some areas of the United States, the pH of rainwater can be 3.0 or lower, approximately 1000 times more acidic than normal rainwater. In 1982, the pH of a fog on the West Coast of the United States was measured at 1.8! When rainwater is too acidic, it can cause problems ranging from killing freshwater fish and damaging crops, to eroding buildings and monuments.

Answer:

ingestion, propulsion, mechanical breakdown, chemical digestion, absorption, and elimination.

Explanation:

Answer: to release waste and process the needed materials used for the construction, maintenance, and healing of the body.

Explanation: In food there are certain things that our body needs such as protein, our body chemically and physically breaks down the nutrients our body needs. Our body also needs a way to get rid of what we don't need through the excretory system.

The pOH of the solution is approximately 1.12.

To calculate the pOH of the solution, we need to determine the concentration of hydroxide ions (OH-) in the resulting mixture.

First, let's calculate the moles of acetic acid and sodium acetate used in the solution:

Moles of acetic acid = volume (in L) * concentration = 0.0221 L * 0.11 M = 0.00243 mol

Moles of sodium acetate = volume (in L) * concentration = 0.0377 L * 0.12 M = 0.004524 mol

Since sodium acetate dissociates completely, we can assume that all of its moles contribute to the hydroxide ion concentration. Therefore, the total moles of OH- in the solution is 0.004524 mol.

Next, we need to calculate the total volume of the solution:

Total volume = volume of acetic acid + volume of sodium acetate = 0.0221 L + 0.0377 L = 0.0598 L

Now we can calculate the concentration of hydroxide ions:

OH- concentration = moles of OH- / total volume = 0.004524 mol / 0.0598 L = 0.0757 M

Finally, we can calculate the pOH of the solution:

pOH = -log10(OH- concentration) = -log10(0.0757) ≈ 1.12

Therefore, the pOH of the solution is approximately 1.12.

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