what volume at stp of (a)o2 (b)H2 (c)Cl2 gas will be liberated during electrolysis by the passage of 48250c of electricity,molar volume=22.4​

Answer:

19.29 g/\(cm^{3}\)

Explanation:

Gold nugget - what we know:

Density's formula: (g/\(cm^{3}\))

Gold volume: 1.68 \(cm^{3}\)

Gold mass: 32.4 g

Use the density formula to find the density of the gold nugget:

= (g ÷ \(cm^{3}\))

= (32.4 ÷ 1.68)

= 19.285 g/\(cm^{3}\)

Therefore the gold nugget has a density of 19.29 g/\(cm^{3}\)

Answer:

13%

Explanation:

As per the given statement 0.297mol NO can be made when 75 moles of HNO3 are consumed

The inorganic substance with the formula HNO3 is nitric acid. It is a mineral acid that is quite corrosive. The substance is colourless, but older samples have a tendency to have a yellow cast because of breakdown into nitrogen oxides..

'3 Cu + 8HNO3      3 Cu(NO3)2 + 2 NO + 4H₂O

Element  Molar Mass

Hydrogen 1

Nitrogen 14

Copper 63.5

Oxygen 16

Referring  the above table we get  no of moles in HNO3

1(1.0) + 1(14) + 3(16) = 1 + 14 + 48 = 63 g/mol

75g HNO3 x 1 mol HNO3/63 g HNO3 = 1.190 mol HNO3

The coefficient of HNO3 is 8, and NO is 2

1.190 mol HNO3 x 2 mol NO/8 mol HNO3 = 0.297mol NO

Hence, 0.297mol NO can be made when 75 moles of HNO3 are consumed.

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0.04 grams of zinc reacted

The Ideal gas law is the equation of state of a hypothetical ideal gas. It is a good approximation to the behaviour of many gases under many conditions, although it has several limitations. The ideal gas equation can be written as

                            PV = nRT

where,

P = Pressure

V = Volume

T = Temperature

n = number of moles

Given,

Volume = 670 ml = 0.67L

Pressure = 576 torr

Temperature = 25 degree celsius

PV = nRT

576 × 0.67 = n × 62.36 × 298

n = 0.02 moles

mass = moles × molar mass

= 0.02 × 2 = 0.04g

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Answer:both

Explanation:

It depends on where your looking at it from

Answer:

an expierience help prove a theory.

The energy of the photon of light can be obtained as 6.27 * 10^-20 J.

We know that a photon has to to do with a particular unit of light. We know that light can be said to be composed of very tiny corpuscles and these corpuscles of light is what we call the photon of the light.

We can be able to us the equation that is derived by Max Plank to be able to get the value of the energy of the photon of light. Now we know that a photon of light can have an energy that is able to be obtained by;

E = hf

h = Plank's constant

f = Frequency

Then;

E = 6.6 * 10^-34 Js * 9.5 * 10^13 Hz

= 6.27 * 10^-20 J

Thus as we can see from the parameters in the question, the energy of the photon is 6.27 * 10^-20 J.

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Answer:

ok

Explanation:

khfdnkv Klein pick pick or en la Web outta

The broadcast wavelength of the radio station 100.7 FM is 2.979 m

The frequency and wavelength of a wave are related according to the following equation

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

With the above formula, we can obtain the wavelength. Details below.

From the question given above, the following data were obatained:

We can obtain the wavelength as follow:

v = λf

3×10⁸ = λ × 100.7×10⁶

Divide both sides by 100.7×10⁶

λ = 3×10⁸ / 100.7×10⁶

λ = 2.979 m

Thus, the wavelength of the radio station is 2.979 m

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The number of moles for the quanity 8.06 x\(10_{21\) atoms of Pt​ is approximately 2.61 grams.

To calculate the number of moles for a given quantity of atoms, we can use Avogadro's number and the molar mass of the element. Avogadro's number is 6.022 x 10²³ atoms/mol.

In this case, you have 8.06 x 10²¹ atoms of Pt. To find the number of moles, divide this quantity by Avogadro's number:

8.06 x 10²¹  atoms Pt / 6.022 x 10²³  atoms/mol = 0.0134 mol Pt

So, there are approximately 0.0134 moles of Pt in 8.06 x 10²¹  atoms of Pt.

The molar mass of Pt (platinum) is 195.08 g/mol. To convert the number of moles to grams, multiply the number of moles by the molar mass:

0.0134 mol Pt x 195.08 g/mol = 2.61 g Pt

Therefore, there are approximately 2.61 grams of Pt in 8.06 x10²¹  atoms of Pt.

In summary, the number of moles for the quantity 8.06 x 10²¹ atoms of Pt is approximately 0.0134 moles. This is equivalent to approximately 2.61 grams of Pt. Remember to use Avogadro's number and the molar mass to perform these calculations accurately.

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Xeriscaping is a landscaping approach that focuses on conserving water by using drought-tolerant plants and efficient irrigation techniques. The goal is to create a visually appealing and sustainable garden while minimizing water usage.

Successful xeriscaping projects involve several key elements. Firstly, careful plant selection is crucial, opting for species that can thrive in arid conditions without excessive watering. Mulching is used to reduce evaporation and retain soil moisture.

Proper soil preparation, such as improving drainage and adding organic matter, promotes healthier plant growth. Efficient irrigation systems, like drip irrigation or soaker hoses, deliver water directly to plant roots, minimizing wastage.

Additionally, controlling erosion through the use of retaining walls or terracing is important. Lastly, regular maintenance, including appropriate pruning and weed control, ensures the longevity and vitality of the xeriscape garden. Overall, a successful xeriscaping project harmonizes sustainable practices with a beautiful outdoor environment.

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X could be \(CH_3CH(OH)CH_2CH_3\) when X is warmed with acidified potassium dichromate (VI) there is a colour change from orange to green.

Alcohol is formed when yeast ferments (breaks down without oxygen) the sugars in different food.

Aldehydes reduce dichromate from the +6 to the +3 oxidation state, changing colour from orange to green. This colour change arises because the aldehyde can be oxidized to carboxylic acid.

Hence, X could be \(CH_3CH(OH)CH_2CH_3\) when X is warmed with acidified potassium dichromate (VI) there is a colour change from orange to green.

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Answer:

2. Products; FeCl2 and H2S

Reactants; FeS and HCl

3. a) 36g of water

b) 64g of oxygen

Answer:

0.146 M

Explanation:

Use v1s1 = v2s2

here, v1 = 500 mL, v2 = 700 mL, s1 = 0.205 M & s2 = new concentration

Answer:

the compound is bromine trifluoride

Explanation:

it contains 58.37 as there is no compound with 58.4 bromine formula brf3

Ancef (Cefazolin) is a first-generation cephalosporin antibiotic that is used to treat bacterial infections. Cefazolin is available in several formulations, including injectable, intravenous, and powder for injection.

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Answer:

Characteristics of a compound

The properties of a compound are different from the properties of its constituents. Formation of a compound is generally accompanied by evolution of energy in the form of heat or light. A compound has a fixed melting point and boiling point. A compound is always homogeneous in nature.

The oxidation number of chlorine in KClO3 is +5 (option A).

The oxidation number of an element is the hypothetical charge of an atom within a molecule.

The oxidation number of an element like chlorine in a compound like Pottasium chlorate can be calculated as follows:

The oxidation number of the elements in KClO3 is as follows:

1 + x - 2(3) = 0

x - 5 = 0

x = +5

Therefore, the oxidation number of chlorine in KClO3 is +5.

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Answer: The answer is incus

Based on the given reactions, the compounds are as follows:

A: The specific product formed from the reaction between prop-1-yne and either 2HBr or H2O2.

B: The product formed when compound A reacts with 2H2O.

C: The product formed when compound B reacts with K2CO3(aq).

D: The product formed from the heat-induced reaction of compound C.

E: The product formed when compound D reacts with HBr.

Based on the given reactions, let's analyze the compounds involved:

Reaction 1: prop-1-yne + 2HBr/H2O2 = A

The reactant prop-1-yne reacts with either 2HBr or H2O2 to form compound A. The specific product formed will depend on the reaction conditions.

Reaction 2: A + 2H2O = B

Compound A reacts with 2H2O (water) to form compound B.

Reaction 3: B + K2CO3(aq) = C

Compound B reacts with K2CO3(aq) (potassium carbonate dissolved in water) to form compound C.

Reaction 4: C + heat = D

Compound C undergoes a heat-induced reaction to form compound D.

Reaction 5: D + HBr = E

Compound D reacts with HBr (hydrobromic acid) to form compound E.

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Answer:

              6.97 moles

Explanation:

Formula Used,

Moles = No. of Molecules ÷ 6.022 × 10²³

Putting Values,

Moles = 4.20 × 10²⁴ ÷ 6.022 × 10²³

Moles = 6.97 moles

Answer:

Kr (molar mass=83.80 g/mol)

Explanation:

as it is the heaviest i think

Answer:

125.4 kilopascals

Explanation:

wkdje

Answer:

125,400 pa = 125.4 kPa

Explanation:

1 pa = 0.001 kPa

&

1 kPa = 1,000 pa

Answer:

The volume of the added acid at the equivalence point in case when titration is done with KOH is,  

VHI * MHI = VKOH * MKOH

VHI = 20.ml * 0.200 M / 0.100 M

VHI = 40.0 ml

The volume of the added acid at the equivalence point in case when titration is done with CH3NH2 is,  

VHI * MHI = VCH3NH2 * MCH3NH2

VHI = 20.0 ml * 0.200 M / 0.100 M = 40.0 ml

As HI is the strong acid and KOH is the strong base, therefore, the pH will be neutral at the equivalence point.  

On the other hand, as HI is the strong acid and CH3NH2 is the weak base, therefore, pH will be acidic at the equivalence point.  

When The volume of the added acid at the equivalence issue in the matter when titration is done with KOH is, VHI = 40.0 ml

When The volume of the added acid at the equivalence issue in the matter when titration is done with KOH

Then VHI * MHI = VKOH * MKOH

After that VHI = 20.ml * 0.200 M / 0.100 M

Now, VHI = 40.0 ml

Then The volume of the added acid at the correspondence point in the matter when titration is done with CH3NH2 is,

Then VHI * MHI is = VCH3NH2 * MCH3NH2

After that, VHI is = 20.0 ml * 0.200 M / 0.100 M = 40.0 ml

As HI is the strong acid and KOH is the strong ground, Thus, the pH will be neutral at the equivalence point.

On the different indicators, as HI is the strong acid and CH3NH2 is the weak base, Thus, pH will be acidic at the equivalence point.

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From the solubility curve, it is clear that 84 g of potassium nitrate can be dissolved in 100 g of water at 50°C.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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Instead, the ability of strong acids to liberate hydrogen atoms (H+) into a particular solution determines their classification.

A solution with a pH greater than 7.0 is referred to as a base. Any solution where the percentage of Hydroxide ions is higher than the percentage of H+ ions is said to be basic. While certain bases immediately take H+, others produce OH- ions instead, which then react with hydrogen to create water. Acid: A solution with too many H+ ions. The Latin name for it is acidus, meaning means "sharp" or "sour." Base: An overabundance of OH- ions in a solution. Alkali is another word for base. Aqueous: A primarily water-based solution. Acids enrich solutions with Hydrogen Ions (H+). Hydrogen ions (H+) & chloride ions are produced when hydrochloric (HCl) splits (Cl-).

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The correct statement is Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons.

In a simple way to explain, Isotopes are species that have the same atomic number and mass number.

In this case, we can say that the correct statement is proton number of isotopes of an element is same.

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When HCl is added to aqueous solution of sodium sulphate aqueous solution, sulfuric acid is formed, and the solution's chemical makeup and acidity get changed.

Thus, several chemical reactions happen when HCl is introduced to a sodium sulphate aqueous solution. While sodium sulphate breaks down into 2 Na+ ions and SO4^2- ions, HCl splits into H+ and Cl- ions. When the H+ ions from HCl interact with the SO4^2- ions, sulfuric acid, a more potent acid, is created.

The solution's H+ ion concentration rises as a result of this reaction, altering the equilibrium in favor of the products. As a result, the system's equilibrium is upset, which causes sulfuric acid to form. The solution's chemical makeup and acidity ultimately alter as a result of the addition of HCl.

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The number of moles in 500g of CaO, CaCO₃, C₁₂H₂₂O₁₁, NaOCl, and CO₂ are 8.93, 5, 1.46, 6.71 and 11.36 moles.

A mole is a scientific unit that is used to determine the number of atoms, molecules, ions, etc. The number of entities in 1 mole was found 6.023 × 10 ²³ per mole which is known as Avogadro’s constant.

a) Given, the mass of each substance = 5 ×10² g

The molar mass of CaO = 56 g

The number of moles in 5 ×10² g of CaO = 500/56 = 8.93 moles

The number of molecules in 8.90 moles of CaO = 8.93× 6.023 × 10 ²³

                                                                               = 53.77 ×10²⁴ formula unit

b) The molar mass of CaCO₃ = 100 g

The number of moles in 5 ×10² g of CaCO₃ = 500/100 = 5 moles

The number of molecules in 5 moles of CaO = 5× 6.023 × 10 ²³

                                                                               = 3.0 ×10²⁴ formula unit

c) The molar mass of C₁₂H₂₂O₁₁ = 342.3 g/mol

The number of moles in 5 ×10² g of  C₁₂H₂₂O₁₁ = 500/342.3 = 1.46 moles

Number of molecules in 8.90 moles of C₁₂H₂₂O₁₁ = 1.46 × 6.023 × 10 ²³

                                                                               =   8.8 × 10 ²³

d) The molar mass of NaOCl = 74.5 g/mol

The number of moles in 5 ×10² g of NaOCl = 500/74.5 = 6.71 moles

The number of molecules in 8.90 moles of CO₂ = 6.71× 6.023 × 10 ²³

                                                                               = 4.04 ×10²⁴

e) The molar mass of CO₂ = 44 g/mol

The number of moles in 5 ×10² g of CO₂ = 500/44 = 11.36 moles

The number of molecules in 8.90 moles of CO₂ = 11.36× 6.023 × 10 ²³

                                                                               = 6.84 ×10²⁴

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