Which are products of nuclear fusion? check all that apply. energy helium gas high temperatures hydrogen gas low pressure

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There are 372 grams of calcium phosphate are theoretically produced if we start with 3. 40 moles of calcium nitrate and 2. 40 moles of lithium phosphate .

Calculation,

The reactant or reagent that produces the least moles of the products is called limiting reagents. When  limiting reagents used up , the reaction stops.

The balanced equation is given as,

[tex]3Ca(NO_{3} )_{2} + 2Li_{3} ( PO_{4} )[/tex] → [tex]3LiNO_{3} + Ca_{3}( PO_{4} )_{2}[/tex]

Multiply the moles of each reactant by the mole ratio between it and calcium phosphate in the balanced equation . so that the moles of the reactant cancel , leaving moles of calcium phosphate.

3.4 mol of calcium nitrate × 1 mol calcium phosphate / 3 mol calcium nitrate = 1.13 mol calcium phosphate

2.4 mol of  lithium phosphate× 1 mol calcium phosphate / 2 mol  lithium phosphate = 1.02 mol calcium phosphate

So, calcium nitrate  is limiting reactant .

Calculation of mass of 1.02 mol calcium phosphate.

Multiply the moles of  calcium phosphate by its molar mass.

molar mass of  calcium phosphate = 3×40.078 g/mol calcium ion+2×30.9 g/mol phosphorus + 8×15.99 g/mol calcium phosphate = 310.178 g/mol calcium phosphate

1.20 mol calcium phosphate × 310.178 g/mol = 372 gram

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Answer:

K2O2 and KO2 is the answer

Answer:

C.) K₂O

Explanation:

Potassium (K) always forms the cation K⁺.

Oxygen (O) always forms the anion O²⁻.

The ionic compound these two ions form must have an overall charge of 0. However, the dissimilar charges on the ions do not cancel out (+1 + (-2) = -1). Therefore, you need to have two K⁺ ions in the compound to balance the charges (+1 +1 + (-2) = 0).

Answer:

Explanation to the following:

It is observed that when magnesium reacts with hydrochloric acid, it produces visible bubbles of hydrogen gas.

A vigorous reaction will occur giving rise of heat as it is an exothermic reaction. If heat is applied then it should be more vigorous.

Reaction is as follows:

Mg(s) + HCl (aq) --> MgCl2 (aq) + H2(g)

Magnesium reacts easily with HCl to produce H2 gas and magnesium ions, Mg2+, and heat. The reaction is exothermic, so it heats up quickly.

Mg(s) + HCl (aq) --> MgCl2(aq) + H2(g)

The net ionic equation :

Mg(s) + 2H+ --> Mg2 + H2(g)

If water is removed from the solution then white crystals of Mgcl2 is obtained.

Or in simple words,

2Mg + 2HCl -> 2Mg+ + 2Cl- + H2(gas)

The magnesium is attacked by the hydrochloric acid resulting in the magnesium dissolving into the solution resulting in a solution of magnesium chloride in hydrochloric acid and the production of hydrogen gas.

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Yes, we can use this balance to  estimate the mass to the nearest milligram.

The weighing balance is the kind of scale that can be used to measure the mass of a body. We know that mass is the quantity of matter that is contained in a  body and the the SI unit of mass is the kilogram.

Looking at the balance as it is graduated in milligrams, we know that measurement to the nearest gram means measurement to the nearest whole number so we can say that the answer is yes. We can use this balance to  estimate the mass to the nearest milligram.

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Toluene compound reacts third fastest with fuming sulfuric acid.

The reaction is attached in figure -

What is toluene?

What is a toluene used for?

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A mixture of three gases containing an equal number of moles of each gas has a total pressure of 12. 0 atm then partial pressure of each gas is 4 atm .

Calculation ,

According to Dalton law the total gas of the container is equal to the sum of partial pressure of each gas .

[tex]P_{t}[/tex] = [tex]P_{1}[/tex] +[tex]P_{2}[/tex]+ [tex]P_{3}[/tex]

Partial pressure = total pressure × mole fraction

mole of each gas is equal . So, mole fraction is also equal for each gas.

Let the number of  mole = x

mole fraction = x/3x =1/3

[tex]P_{1}[/tex] = 12. 0 atm/3 = 4 atm

[tex]P_{2}[/tex] = 12. 0 atm/3 = 4 atm

[tex]P_{3}[/tex] = 12. 0 atm/3 = 4 atm

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Answer:

CrO₂ --------------------> Cr⁴⁺ and O²⁻

VCO₃ -------------------> V²⁺ and CO₃²⁻

Cr₂(SO₄)₃ -------------> Cr³⁺ and SO₄²⁻

(NH₄)₂S ----------------> NH₄⁺ and S²⁻

Explanation:

Within ionic compounds, the cation is listed first, followed by the anion. Some of the ions are polyatomic, meaning they are covalently bonded to other elements. Polyatomic ions always have a specific charge.

All of these ionic compounds have an overall charge of 0. As such, the charges of the cations and anions must balance out. In order to do so, there are some compounds which have more than one atom of each ion.

2.) CrO₂

------> Oxygen (O) always forms the anion, O²⁻.

------> Therefore, if there are 2 oxygen anions, the chromium (Cr) must have the cationic form of Cr⁴⁺.

------> +4 + (-2) + (-2) = 0

3.) VCO₃

------> Carbonate (CO₃), a polyatomic ion, always has the state CO₃²⁻.

------> If there is only one atom of each ion, the charges must perfectly balance, making vanadium (V) be the cation V²⁺.

------> +2 + (-2) = 0

4.) Cr₂(SO₄)₃

------> Sulfate (SO₄), a polyatomic ion, always has the state SO₄²⁻.

-------> The only way the charges could balance out is if the chromium (Cr) is in the cationic form Cr³⁺.

------> +3 + 3 + (-2) + (-2) + (-2) = 0

5.) (NH₄)₂S

------> Ammonium (NH₄), a polyatomic ion, always has the state NH₄⁺.

------> Sulfur (S) always forms the anion S²⁻.

------> +1 + 1 + (-2) = 0

Answer:

0.0423 L

Explanation:

Molarity can be represented by the following ratio:

Molarity = moles / volume (L)

You can plug the given values into the equation and simplify to find the volume.

Molarity = moles / volume

0.730 M = 0.0309 moles / volume

(0.730 M) x volume = 0.0309 moles

volume = 0.0423 L

Bombardment of uranium-238 nuclei by carbon-12 nuclei produces californium-246 and neutrons then the complete, balanced equation for this nuclear process is given a ,

[tex]^{238} _{92}U + ^{12} _{6} C[/tex] → [tex]^{246} _{98} Cf + 4^{1} _{0} n[/tex]

Nuclear fusion reactions are defined as the reaction in which, two or more lighter atoms combine to form a heavier atom. The number of atoms formed in this reaction decreases from the given atoms. The nuclear process is also nuclear fusion.

Example : Bombardment  of uranium-238 nuclei

Chain reactions are defined as the reaction in which the neutrons that are released in the previous fission reaction act as the starting material in the next reaction. Thus, this process continues to many reactions.

Ionization reaction is defined as the reaction in which an ionic compound dissociates into its ions when dissolved in aqueous solution.

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The pH of blood if pco2 drops to 35.0 mmhg is 7.459

The pH of the blood can be calculated using the Henderson- Hasselbalch equation, it explains the relation between acid dissociation constant pKa and pH in biological and chemical systems.

pH = pK + log ( HCO3- / ( 0.03 * PCO2 ) )

pK is 6.1 for bicarbonate buffer system.

HCO3- = 24mm

PCO2  = 35.0 mmhg

pH = 6.1 + log ( 24 / 0.03 * 35.0 )

     = 6.1 + log ( 24 / 1.05 )

     = 6.1 + log 22.8571

     = 6.1 + 1.3590

     = 7.459

Hence, the pH of blood is 7.459

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Atomic or hybrid orbitals make up the sigma bond between c1 and c2 in ethane, ch3ch3 are one s orbital and 2 p orbital

Sigma bonds are the most powerful type of covalent chemical link. They are generated by atomic orbitals overlapping head-on. For diatomic molecules, sigma bonding is most readily explained using the language and tools of symmetry groups.

Chemical covalent bonds are sigma bonds and pi bonds. The overlap of atomic orbitals creates sigma and pi bonds. Sigma bonds are produced by overlapping from end to end, whereas Pi bonds are created when the lobe of one atomic orbital overlaps another.

Sigma bonding can be seen in the link between two hydrogen atoms. Sigma bonds are also formed between the sp3 orbitals of hybridized carbon and the s orbitals of hydrogen in methane.

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The combination of properties would be expected to lead to the most viscous liquid include:

This is defined as the resistance of a liquid to flow and is characterized by its sticky nature.

This is as a result of the strong intermolecular forces which holds the atoms together and low temperature keeps them in shape thereby making it the most appropriate c hoice.

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The oxygen consumption for a burmese python at 20 contractions per minute 5,30,35,10,15,20,25 contractions per minute.

The Eastern Hemisphere's tropical and subtropical regions are home to the genus Python, a family of constricting snakes. For non-venomous flecked snakes, François Marie Daudin suggested the name "Python" in 1803. There are now 10 recognized python species. A new species has been established, and three previously recognized python subspecies have been elevated.

Ythons lack venom, and colubrids (rear-fanged snakes) either lack venom entirely or have a weak venom. It is important to take venomous elapid (front-fanged snake) bites seriously and treat them accordingly. Massive snakes called pythons have a brutal killing style. These snakes, like other strong constrictors like anacondas, will capture their victims with their mouths and wrap around them.

What was the oxygen consumption for a burmese python at 20 contractions per minute?

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The balanced chemical equation for the standard formation reaction of liquid acetic acid is given as ,

[tex]2C(gr) +2H_{2} (g) +O_{2} (g)[/tex]  → [tex]CH_{3} COOH(l)[/tex]

The reaction that form the products from their elements in their standard state is called formation of reaction .The acetic acid consist C , H , and O , So, determine their standard state . Carbon is graphite at 25°C and 1 atm , whereas hydrogen and oxygen are diatomic gases . Hence , we start with unbalanced reaction.

[tex]C(gr) +H_{2} (g) +O_{2} (g)[/tex] → [tex]CH_{3} COOH(l)[/tex]

The balanced chemical equation for the standard formation reaction of liquid acetic acid as,

[tex]2C(gr) +2H_{2} (g) +O_{2} (g)[/tex]  → [tex]CH_{3} COOH(l)[/tex]

The combustion of liquid acetic acid is given as,

[tex]CH_{3} COOH(l) + 2O(g)[/tex] → [tex]2CO_{2}((g) +2H_{2} O(l)[/tex]                    ΔH =-873

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The compound with the highest boiling point is [tex]CH_{3} CH_{2} OH[/tex] .

So, option C is correct one.

The boiling point depend two factors,

The boiling point of ether is less than alcohols because alcohol form hydrogen-bonding .The hydrogen bond is strongest bond. So, ethyl alcohol and methyl alcohol has more boiling point than dimethy ether.

The propane molecules have only van-der waals force of attraction, which is weakest force of attraction.So, propane has lowest boiling point.

The molecular mass of ethanol is greater than methaol. So, ethanol has higher boiling point.

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Ka= 2.1106

The ka value of the acid will be:

Ka=2.1106

HA(aq)+OH−(aq)→A−(aq)+H2O(l)

You reach the halfway point when

[HA]=[A−]

It implies that

log([HA][A−])=log(1)=0

As a result, it can be claimed that at the half-equivalence point, the pH of the solution and the pKa of the weak acid are equivalent.

pH=pKa at the midpoint of equivalency.

The pKa is determined by the weak acid's acid dissociation constant, Ka. Ka=10pKa, as shown by the formula pKa=log(Ka).

When the two points are half equal, Ka=10pH will exist.

Put in your value to learn Ka=105.67=2.1106.

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The surfaces of the cylinder block and cylinder head are interconnected to help cool the engine.

When an automobile engine is running, it generates a lot of heat and needs to be continuously cooled to prevent engine damage.

This is typically accomplished by pumping coolant liquid—often water combined with antifreeze solution—through unique cooling tubes. Air passing across cylinder casings with fins helps cool some engines.

The cylinder head and block of a water-cooled engine are interconnected by coolant channels. All of the channels come together to form a single exit at the top of the cylinder head.

Hot coolant is forced out of the engine and into the radiator, which serves as a type of heat exchanger, by a pump that is driven by a pulley and belt from the crankshaft.

Unwanted heat is transferred from the radiator into the air stream, after which the cooled liquid flows back into the channels after returning to an entrance at the bottom of the block.

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N3H is the correct answer.

N3H is the molecular formula of the smallest neutral compound of nitrogen and hydrogen.

an expression that lists the quantity and kind of atoms that make up a substance's molecules.

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3M

3M is the molarity of a koh solution if 200 ml of the solution contains 0. 6 moles KOH.

Molarity : Molarity is defined as the number of moles of solute present in one liter of solution.

We know that,

Molarity = [tex]\frac{n*1000}{v}[/tex]

where,

n = moles of solute of KOH = 0.6

V= volume of solution in ml= 200 ml

Now on substituting the values in the molarity formula,

molarity = [tex]\frac{0.6*1000}{200}[/tex] = 3M/L

Therefore, molarity = 3M

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According to the IUPAC convention alkyl substituents on a hydrocarbon chain should be listed in alphabetical without considering prefixes order.

IUPAC convention of organic chemistry is a method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry (IUPAC).

The name of the compound is written out with the substituents in alphabetical order followed by the base name (derived from the number of carbons in the parent chain).

Types of IUPAC  Nomenclature of a few important aliphatic compounds:

Example :

Ethane, which has 2 carbon atoms and 6 hydrogen atoms, with the molecular formula of = C₂H₆

Formation of alkyl group:

Methane (CH₄)  Remove 1 hydrogen (H) convert to methyl (H₃-C-)

Example: Propyl (-CH₃ - CH₂ - CH₂ - )

According to the IUPAC convention alkyl substituents on a hydrocarbon chain should be listed in alphabetical without considering prefixes order.

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Carbon atoms present in 2. 00 g of butane is 8.28 × 10^22.

Molecular weight of C4H10 is = 58.1 grams

Moles of butane = given mass/ molar mass

= 2/58.1

= 0.0344 mol

Multiply the number of moles by Avogadro's number. This will let you obtain the number of butane molecules:

0.0344 x 6.023 x 10^{23} molecules of butane = 2.07 × 10^22 molecules

of butane

Now multiply this number by four (due to four carbon atoms per butane molecule) to obtain the answer:

so, no. of carbon atoms = 4 x 2.07x 10^22 = 8.28x 10^22 atoms.

Thus the no. of carbon atom is 8.28×10^22.

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91.4 grams

91.4 grams of kcl in grams must be added to 500 ml of a 0. 15 m kcl solution to produce a 0. 40 m solution.

C = mol/volume

2.45M=mol/0.5L

2.45M⋅0.5L = mol

mol = 1.225

Convert no. of moles to grams using the atomic mass of K + Cl

1.225mol * [tex]\frac{39.1+35.5}{mol}[/tex]

mol=1.225

=1.225 mol . [tex]\frac{74.6g}{mol}[/tex]

=1.225 . 74.6

=91.4g

therefore, 91.4 grams of kcl in grams must be added to 500 ml of a 0. 15 m kcl solution to produce a 0. 40 m solution.

What is 1 molar solution?

In order to create a 1 molar (M) solution, 1.0 Gram Molecular Weight of the chemical must be dissolved in 1 liter of water.

58.44 g make up a 1M solution of NaCl.

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Answer:

Reactants: Fe₂O₃ and C

Products: Fe and CO₂

Explanation:

The reactants are the molecules that undergo changes in a reaction.

The products are the molecules which are made during a reaction.

The reactants are on the left side of the arrow and the products are on the right side of the arrow. Therefore.....

The chemical reaction:

2 Fe₂O₃ + 3 C -----> 4 Fe + 3 CO₃

Reactants: Fe₂O₃ and C

Products: Fe and CO₂

Answer:

B.  4 Fe + 3 0₂---> 2 Fe₂O3        

Explanation:

(A) Ir + O₂--> IrO₂                                 No:  Ir is iridium

(B) 4 Fe + 3 0₂---> 2 Fe₂O3                Yes:  Fe is iron and O is oxygen,                  and the equation is balanced.

(C) I+ 0₂ ---> 10₂                                  No:  I is iodine

(D) 3 Ir + 0₂ -> 6 Ir₂03                         No:  I is iodine

Answer:

0.453 moles

Explanation:

The Ideal Gas Law equation looks like this:

PV = nRT

In this formula,

-----> P = pressure (atm)

-----> V = volume (L)

-----> n = moles

-----> R = Ideal Gas Constant (0.08206 atm*L/mol*K)

-----> T = temperature (K)

To find the amount of moles of gas, you can plug the given values into the equation and then simplify.

P = 2.7 atm                                 R = 0.08206 atm*L/mol*K

V = 4.2 L                                     T = 305 K

n = ? moles

PV = nRT

(2.7 atm)(4.2 L) = n(0.08206 atm*L/mol*K)(305 K)

11.34 = n(25.0283)

0.453 = n

436 atoms of Pb 207 are left in the rock.

Alpha and beta decays are the mechanism through which uranium transforms into the lead. While 235U and its daughter nuclides only experience seven alpha and four beta decays, 238U and its daughter nuclides suffer eight alpha and six beta decays overall.

When there are too few neutrons in relation to protons, alpha decay occurs. There is the discharge of an alpha particle, which consists of two protons and two neutrons.

When there are more neutrons than protons, beta decay can happen. A high-speed electron is ejected from a proton that transforms spontaneously from a neutron.

Since gamma radiation is emitted as a wave rather than a particle, the atomic structure of an atom remains unaltered. Atomic fission is the primary cause of neutron emission. At one time, many neutrons can be released.

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The activation energy for this reaction is - 55.5 kJ/mol

Calculation,

Given data,

First temperature [tex]T_{1}[/tex] =  302°C = 302+273 = 575 K

Second temperature [tex]T_{2}[/tex] =  508°C =  508+273 = 781 K

rate constant at  302°C = 2. 45 × [tex]10^{-4}[/tex] lit/mol s

rate constant at 508°C =  0. 0965 lit/mol s.

Value of universal gas constant = 8.3145 J/k mol.

Apply Arrhenius equation,

㏒[tex]K_{1} /K_{2}[/tex] = [tex]E_{a}/2.203R[/tex] [1/ 575 K - 1/781 K]

㏒2. 45×[tex]10^{-4}[/tex] lit/mol s/0.0965 lit/mol s = [tex]E_{a}[/tex] /2.303×8.3145 J/k mol[781-575/575K×781 K]

[tex]E_{a}[/tex] = - 55.5 kJ/mol

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Answer: 75.3%

Explanation:

Mg molar mass = 24

MgCl2 molar mass = 94

—> 94 x 10 / 24

29.5/1 x 24/94 x 10

= 29.5 x 24 / 94 x 10

since we are looking for percentage yield we multiply by 100

= 29.5 x 24 x 100 / 94 x 10 = 75.3%