In a thermonuclear device, the volume is 0.05L of gas and a pressure
of 4.0x106 atm. When the bomb goes off, it relases a gas into the
atmosphere at 1.0 atm, what is the volume of the gas after the
explosion?

Answer:

There were originally 8 atoms of Potassium-40.

Explanation:

The half-life of a radioactive material is the time taken for half the original material to decay or the time required for a quantity of the radioactive substance to reduce to half of its initial value.

If the original material formed without any Argon-40, it means that the atoms originally present were Potassium-40 atoms.

Presently, there are 7 Argon-40 atoms for every 1 of Potassium-40, we can deduce the number of half-lifes the Potassium-40 has undergone as follows :

After one half-life, (1/2) there will be one Potassium-40 atom for every Argon-40 atom.

After a second half life, 1/2 × 1/2 = 1/4: there will be one Potassium-40 atom for every three atoms of Argon-40.

After a third half-life, 1/4 × 1/2 = 1/8: there will be one Potassium-40 atom for every 7 atoms of Argon-40.

Since there are 1/8 atoms of Potassium-40 presently, there were originally 8 atoms of Potassium-40.

An atom with 6 bonds without a lone pair of electrons gives an octahedral molecular shape using the VSEPR rules.

What is VSPER Theory?

Based on the number of valence shell electron bond pairs between the atoms in a molecule or ion, the valence shell electron pair repulsion (VSEPR) hypothesis is a model used to predict 3-D molecular shape. According to this hypothesis, electron pairs will position themselves to reduce the consequences of their mutual repulsion. The electron pairs are, in other words, as far apart as they can be.

For forecasting and visualising molecular structures, utilise the VSEPR model. Linear, trigonal planar, angled, tetrahedral, trigonal pyramidal, trigonal bipyramidal, disphenoidal (seesaw), t-shaped, octahedral, square pyramidal, square planar, and pentagonal bipyramidal are the different types of structures.

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Explanation:

Step 1

In areas with a lot of sunlight, outdoor black boilers can be used. These boilers are simple black boxes that absorb the Sun's radiation and heat the water inside.

Step 2

On the other hand, a pressure cooker can be used for cooking. It is working on a principle of isochron change of temperature and pressure in a cooker.

339 mL of 8.50 × 10−2 M NaOH is required to titrate 55.0 mL of a solution containing 1.80 g of HCl per liter to the equivalence point.

Milliliters required to titrate are:

Part A: Let us calculate the number of moles of HNO3 using the formula:

moles HNO3 = Molarity × Volume (in liters)

moles HNO3 = 9.00 × 10−2 mol/L × 45.0 mL × 1 L/1000 mL

moles HNO3 = 0.0405 mol

Now, using the balanced equation of the reaction:

HNO3 + NaOH → NaNO3 + H2O1 mole of HNO3 reacts with 1 mole of NaOH.

Hence, the number of moles of NaOH required is the same as that of HNO3.

The volume of NaOH is calculated using the formula:

Volume of NaOH = moles NaOH/Molarity

NaOHVolume of NaOH = 0.0405 mol/8.50 × 10−2 mol/L = 0.476 L = 476 mL ≈ 480 mL

Therefore, 480 mL of 8.50 × 10−2 M

NaOH is required to titrate 45.0 mL of 9.00 × 10−2 M HNO3 to the equivalence point.

Part C: 55.0 mL of a solution containing 1.80 g of HCl per liter V = ?Let us calculate the number of moles of HCl:

Mass of HCl = concentration × volume × molar mass

Mass of HCl = 1.80 g/L × 55.0 mL/1000 mL × 1 mol/36.46 g

Mass of HCl = 0.0288 mol HCl reacts with NaOH in a 1:1 mole ratio.

Hence, the number of moles of NaOH required is also 0.0288 moles. The volume of NaOH is calculated using the formula:

Volume of NaOH = moles NaOH/MolarityNaOH

Volume of NaOH = 0.0288 mol/8.50 × 10−2 mol/L = 0.339 L = 339 mL.

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Answer:

The effects of each kind of radiation is different on the molecules.

Explanation:

Microwave causes molecules that have two opposing poles to spin rapidly due to absorption of the electromagnetic radiation waves. When molecules absorb Infrared radiation, changes occur from a ground vibrational state to an excited vibrational state. When the visible light is absorbed by molecule, the electron is excited and goes to an orbital of higher energy than the lower energy. Ultraviolet radiation turns the stable molecule into a reactive species.

Answer:

condensation nuclei

Explanation:

In the balanced chemical equation 2 Al(s) + 3 Br2(l) → Al2Br6(s), the stoichiometric ratio between Al and Br2 is 2:3. This means that for every 2 moles of Al consumed, 3 moles of Br2 will be consumed. Since we are given the number of molecules of Br2, we need to convert it to moles using Avogadro's number.

6.02 x 10^23 molecules of Br2 is equal to 6.02 x 10^23 / 6.022 x 10^23 = 0.999 moles of Br2.

According to the stoichiometric ratio, for every 3 moles of Br2 consumed, 2 moles of Al will be consumed. Therefore, the number of moles of Al consumed will be (2/3) * 0.999 = 0.666 moles.

Finally, we can convert the moles of Al to atoms using Avogadro's number. One mole of any substance contains 6.022 x 10^23 particles (atoms, molecules, etc.).

So, the number of atoms of Al consumed will be 0.666 * 6.022 x 10^23 = 4.01 x 10^23 atoms of Al.

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Answer:

The specific heat and heat of vaporization of water will be very high.

Explanation:

The strength of the hydrogen bonds and the attractions that they create between water molecules makes it much harder for water to increase in temperature.

This is because the bonds need to be broken before the water can vaporize (heat of vaporization) or increase in temperature (specific heat)

An example of disruptive selection because both extremes are favored to survive is a Selection for the homozygous dominant (AA).

The CCRS-delta 32 gene provided immunity to a deadly disease of bacterial origin, bubonic plague. People who are homozygous for the CCR5-della 32 gene variant are completely immune, while heterozygotes only have partial immunity and homozygous recessive have none is a Selection against the heterozygote and one homozygote.

Sickle cell disease - homozygous dominant contract malaria, homozygous recessive die young from sickle cell, heterozygotes immune to malaria is Selection for the heterozygote.

This type of selection will result in the extinction of the species as all genotypes are at a selective disadvantage is a Selection against all genotypes.

Huntington's disease is a single-gene disorder caused by a malfunctioning gene on chromosome 4. It is an autosomal dominant disease, which means that only one copy of the gene needs to be defective is a Selection against the heterozygote.

Homozygotes are organisms that have the same copy of alleles for a given trait. For example, if the allele for height is H and h where H is the allele for tallness while h is for short.

The genotype of the homozygotes will be HH or hh

Heterozygotes are organisms that have different copies of alleles for a given trait. For example, if the allele for height is H and h where H is the allele for tallness while h is for short.

The genotype of the heterozygotes will be Hh.

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We need to measure 30.42 ml of the 1.277 M stock NaOH solution and dilute it to a final volume of 250.0 ml to obtain a 0.1236 M dilute NaOH solution.

To prepare 250.0 ml of a 0.1236 M dilute NaOH solution from a 1.277 M stock NaOH solution, we can use the following formula:

C1V1 = C2V2

where C1 is the concentration of the stock solution, V1 is the volume of the stock solution needed, C2 is the concentration of the dilute solution, and V2 is the final volume of the dilute solution.

Substituting the values into the equation, we get:

(1.277 M) V1 = (0.1236 M) (250.0 ml)

V1 = (0.1236 M) (250.0 ml) / (1.277 M)

V1 = 30.42 ml

Therefore, we need to measure 30.42 ml of the 1.277 M stock NaOH solution and dilute it to a final volume of 250.0 ml to obtain a 0.1236 M dilute NaOH solution.

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A heating curve illustrates the changes in the temperature and physical state of a substance as it is heated (Option D).

The changes in the temperature and physical state shows how the substance absorbs heat and undergoes changes in its physical state, such as melting or boiling, as its temperature increases. It does not illustrate chemical changes that may occur. It also indicates phase transitions, such as melting and boiling points, where the substance changes its physical state.

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[Ar]4s23d6 the electron configuration of the metal ion in Fe(NO3)3.

The noble gas krypton, which is isoelectronic with As arsenic 3 ion (As3), is isoelectronic with [Ar]3d104s2sp6 because it has gained three electrons.

Transition-metal ions are frequently referred to as having dn configurations because their valence electrons are mostly found in d orbitals. For instance, it is claimed that the Co3+ and Fe2+ ions have a d6 configuration.

The number of protons in the atomic nuclei of arsenic, abbreviated As, is 33. 33 electrons would likewise be present in a neutral As atom.

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A redox reaction is a chemical reaction in which one or more of the reacting species undergoes oxidation and one or more undergoes reduction. An oxidizing agent is an element or compound that oxidizes another substance, while a reducing agent is an element or compound that reduces another substance.

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The phosphoric acid 51.1 g will be produced when  Ca₃(PO₄)₂+ 3H₂SO₄ ⇒ 3CaSO₄ + 2H₃PO₄ is carried out starting with 153 g .

Option B is correct .

                 Ca₃(PO₄)₂+ 3H₂SO₄ ⇒ 3CaSO₄ + 2H₃PO₄

According to this equation, the ratio of calcium phosphate to phosphoric acid is 1:2 mol. Phosphoric acid and sulfuric acid have a mol ratio of 3:2.

To get the moles of phosphoric acid, we first convert the grams of each reactant into moles and then multiply those moles by the mol:mol ratios above. Moles of phosphoric corrosive are duplicated by getting it's grams is molar mass. The limiting reactant would be the reactant that produces fewer grams of phosphoric acid; the amount of phosphoric acid produced will be our response.

The following are the results of calculating grams of phosphoric acid from each of the reactants:

From the given grams of calcium phosphate, how to calculate grams of phosphoric acid:

153g Ca₃(PO₄)₂ [1 mol (Ca₃ PO₄)₂ /310.18g Ca₃( PO₄)₂ ] [2 mol H₃PO₄/1 mol Ca₃(PO₄)₂ [ 97.99 g H₃PO₄/ 1 mol H₃ PO₄]

                         =  96.7 g H₃PO₄

76.8 g H₂SO₄ [ 1 mol H₂SO₄/ 98.08 g H₂SO₄] [ [1 mol H₃PO₄/ 3 mol H₂SO₄]  [97.99g H₃PO₄ / 1 mol H₃PO₄]

                                   = 51.1 g H₃PO₄

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The mass of phosphoric acid that will be produced when the reaction is carried out starting with 153 g  is 5.11 g.

The correct option is B

The mass of phosphoric acid that will be produced when the reaction is carried out starting with 153 g is determined from the mole ratio as given by the equation of the reaction below:

Equation of reaction:      Ca₃(PO₄)₂+ 3 H₂SO₄ ⇒ 3 CaSO₄ + 2 H₃PO₄

The mole ratio of calcium phosphate to phosphoric acid is 1 :2.

The mole ratio of Phosphoric acid and sulfuric acid is 3:2.

Moles of Ca₃(PO₄)₂ will be 153/310 = 0.49 moles

Moles of H₂SO₄ will be 76.8/98 = 0.78 moles

Based on the mole ratio, the limiting reactant is H₂SO₄

Mass of phosphoric acid produced = 0.78 * 2/3 * 98

The grams of phosphoric acid = 51.1 g H₃PO₄

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Answer:

It was the fifth radioactive element discovered, and is typically a colorless gas that puts off an insane glow when frozen.

Answer:

The main properties of water are its polarity, cohesion, adhesion, surface tension, high specific heat, and evaporative cooling.

Explanation:

Boiling Point and Freezing Point.

Surface Tension, Heat of Vaporization, and Vapor Pressure.

Viscosity and Cohesion.

Solid State.

Liquid State.

Gas State.

The mass number of an atom of potassium that has 20 neutrons is option C. 39

Mass number-

Mass number is the total number of protons and neutrons in the nucleus of an atom is called the mass number. It is represented by the symbol A. In other words, mass number refers to the sum of the number of protons and neutrons in the nucleus of an atom.

Atom-

Atoms are tiny particles that make up everything in the world. Everything in the world is made up of tiny particles known as atoms. An atom is the basic unit of matter. The term "atom" comes from the Greek word atomos, which means indivisible.

The basic building blocks of all matter are atoms, which are made up of three types of particles: protons, neutrons, and electrons.

In a neutral atom, the number of electrons is equal to the number of protons, thus the overall charge on the atom is zero. However, the mass number of the atom is equal to the sum of the number of protons and neutrons.

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The flaw in Regina’s plan is that the time frame is unrealistic (option B).

Goal setting involves the development of an action plan designed in order to motivate and guide a person or group toward a goal, which is a result that one is attempting to achieve.

Effective goal setting lets you measure progress, overcome procrastination and visualize your dreams. However, setting goals is said to be effective when it is done in an adequate time frame.

According to this question, Regina identifies her goal and hastily writes it down as follows: I will make an A on my English literature term paper that is due next week.

This goal, although is great, is unlikely to be met because of the time frame. One cannot get an excellent result in something that lacks adequate preparation, which includes adequate time.

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A sample contains 7.90 g C and 42.1 g S.  The empirical formula is CS\(_4\). 2.63 moles of S are in the sample.

The empirical formula of a compound in chemistry is indeed the simplest whole integer ratio of elements contained in the substance. The empirical formula for sulfur monoxide is a basic example of this notion.

Their molecular formulae, which indicate the number of atoms for each molecule of something like a chemical compound, are, however, not identical.

moles of carbon =  7.90 / 12 =0.65moles

moles of Sulfur= 42.1 / 16=2.63 moles

dividing both by 0.65

moles of carbon = 0.65/0.65= 1

moles of Sulfur =2.63/ 0.65 =4.04

The empirical formula is CS\(_4\)

Therefore, the empirical formula is CS\(_4\).

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Answer: 1.313

Explanation:

Answer:

1- Natural sources are renewable with time

2- To refrain from over usage of products on unnecessary things

3- An example of poor soil management is using the soil with the most minerals to put houses on instead of farming with

The coordination number of the central metal in [Cr(CO)6] is 6. This means that there are 6 ligands attached to the central chromium atom. The CO ligand is classified as a monodentate ligand, meaning it can donate one electron pair to the central metal.

In the case of Na3[CuCl5], the coordination number of the central metal is 5. This means that there are 5 ligands attached to the central copper atom. The Cl- ligand is classified as a monodentate ligand, meaning it can donate one electron pair to the central metal.

To summarize, the coordination number for [Cr(CO)6] is 6, and the coordination number for Na3[CuCl5] is 5.

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A playing card was placed on top of a glass during the clever at-home experiment, and then a quarter was placed on top of the card. The quarter landed in the glass when the card was pushed.

To determine the likelihood that the fetus will be born with specific chromosomal abnormalities, pregnant women can take the non-invasive prenatal screening test NIFTY (also known as cell-free DNA screening).

Because of its inertia, the coin is strongly motivated to remain stationary. The card cannot be moved quickly enough to defeat that force if it is moved slowly. The coin drops into the cup after staying in one position if you flick it swiftly.

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It can be said that water will take more heat to raise its temperature by 1°C than copper. Details about specific heat can be found below.

Specific heat capacity of a substance can be defined as the amount of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K or 1 °C.

According to this question, water has a specific heat of 4.184 J/g°C while Copper metal has a specific heat of 0.385 J/g°C. This shows that water has a higher specific heat.

Therefore, it can be said that water will take more heat to raise its temperature by 1°C than copper metal.

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The following ions or compounds' oxidation numbers for each atom (a.)+1,-1 d. +3,-1 g. +1,+4,-2 (b). +4,-1 e. +4,-2 h. +3,-2 (c.) +1,-2 f. +1,-1 i. +6,-2.

All alkali earth metal ions always have an oxidation number of +2. All metal ions in the boron family have an oxidation number of +3. Hydrogen has an oxidation number of +1 in proton (H+) and -1 in hydride. Oxygen has an oxidation number of two in oxide ions (O2-) and one in peroxide ions (O-O2-).

When an object comes into touch with oxygen or the other oxidizer, a chemical reaction occurs. Rust and the brown hue of a sliced apple are examples of oxidation.

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Option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

The long-run equilibrium condition for perfect competition is that price (P) is equal to average total cost (ATC), which is also equal to marginal cost (MC), and marginal revenue (MR).

Option (d), P=ATC=MR=MC, best represents the long-run equilibrium condition for perfect competition. In perfect competition, firms operate at the minimum point of their average total cost curve, where price equals both average total cost and marginal cost. This condition ensures that firms are earning zero economic profit and are producing at an efficient level.

In the long run, if firms are earning economic profit, new firms will enter the market, increasing competition and driving prices down. Conversely, if firms are experiencing losses, some firms may exit the market, reducing competition and causing prices to rise. This process continues until firms reach a state where price equals average total cost, marginal cost, and marginal revenue, ensuring a long-run equilibrium.

Therefore, option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

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Answer:

Negatively charged ion.

Explanation:

Example:

Oxygen is an element containing negatively charged ions. Its valence number is minus 2.

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Answer:

Well rust just because the rain and wind sun whatever its meatal it stayed outside too long!

Explanation:

I really dont kno but i hope im right

Answer:

the concentration is 10^(-8) M

The concentration of [H30+] in the solution when the pH of the solution is \(1.32*10^8\ m.\)

Since The pH of a solution is 7.880

So here

pH = -log{H+}

{H+} = \(10^-PH\)

[H30+] \(= 10^{-7.88}\)

\(= 1.3182*10^-8\ mol\\\\= 1.32*10^-8\ m\)

hence, The concentration of [H30+] in the solution is \(1.32*10^8\ m.\)

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