Which option describes the molecule geometry of a molecule with one bond and three lone pairs?

A. octahedral

B. linear

C. angled

D. tetrahedral

Answer:Its claim 2

Explanation:claim 1 says All of the atoms are destroyed but atoms cant be destroyed.Claim 3 might seem correct but is not.

Answer:

THE MOLECULAR FORMULA FOR THE COMPOUND IS N20

Explanation:

To calculate the molecular formula for the compound, we follow the following steps:

Write out the percentage abundance of the individual elements

N = 63.65 %

O = 36.35 %

2. Divide the percentage composition by the atomic masses of the elements

N = 63.65 / 14 = 4.546

O = 36.35 / 16 = 2.272

3. Divide the values by the lowest value

N = 4.546 / 2.272 = 2.00

O = 2.202 / 2.272 = 1

4. The empirical formula of the compound will be:

N2O

5. Calculate the molecular mass

(N2O ) x = 44.02 g/mol.

(14 * 2 + 16) x = 44.02

(28 + 16) x = 44.02

44 x = 44.02

x = 44.02 / 44

x = 1

The molecular formula for the compound is N2O

the first 4 are the answers

meteor : deformation

erosion : deformation

plate tectonics : formation : like mountain formation

volcanic : formation

You may use a hand-lens to help you make this measurement.  A student investigates the vertical oscillations of the mass–spring system.

Depending on the point of view and the unit of time, velocity is the rate at which the direction of an object in motion changes over time. Velocity is a key concept in kinematics, the branch of classical mechanics that analyzes how bodies move.

The physical vector quantity known as velocity's magnitude and direction must be determined. The scalar absolute value (magnitude) of velocity is speed, a coherently derived unit whose quantity is measured in meters per second in the SI (metric system). In contrast to "5 meters per second east," which is a vector, "5 meters per second" is a scalar.

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The unknown metal with C(metal) of 0.90J/gC and mass of 4.67g is aluminum.

The metal's specific heat is calculated using the heat equation. It is important to note that the total heat (Q), which is the sum of the two heats (Qwater and Qmetal), is equal to zero at equilibrium.

Now, Q(total)=Q(water)+Q(metal)

0=m(water)

The specific heat of water, C(water), is equal to 4.18 J/g, while the other two components are water and metal.

The temperature of a metal is known as C(metal).

With the given values all substituted, we obtain 0=m(water) C(water)T(water) +m(metal).

CmetalΔTmetal=(24.3g)(4.184J/g°C) (24.6°C−21.7°C)+(4.67g) (Cmetal)(24.6°C−95.1°C)

The metal's specific heat is given by the equation C(metal)=0.90J/gC, which is simplified by placing C(metal) on one side of the equation.

Part (b):As a result, aluminum is the metal.

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Answer: h3po4 + ca(oh)2 = h2o + ca3(po4)2

Explanation:

I hope this helped!

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The pH of each of the 0.14 M HF solution is 2.166, and the pH of each of the 0.14 M NaF solution is 8.30. The pH of the combined solution of 0.14 M HF and 0.14 M NaF is 3.45.

a) pH of 0.14 M HF solution is

ICE table

               HF + H2O <===> H3O+   + F-

initial       0.14                          -           -

change      -x                          +x         +x

Eq          0.14-x                        x            x

So,

Ka = [H3O+][F-]/[HF]

3.5 x 10^-4 = x^2/0.14-x

x^2 + 3.5 x 10^-4x - 4.9 x 10^-5 = 0

x = [H3O+] = 6.83 x 10^-3 M

pH = -log[H3O+] = 2.166

b) pH of 0.14 M NaF

ICE table

              Naf + H2O <===> HF   + OH-

initial       0.14                          -           -

change      -x                          +x         +x

Eq          0.14-x                        x            x

So,

Kb = Kw/Ka = [HF][OH-]/NaF]

1 x 10^-14/3.5 x 10^-4 = 2.86 x 10^-11 = x^2/0.14-x

x^2 + 2.86 x 10^-11x - 4 x 10^-12 = 0

x = [OH-] = 2 x 10^-6 M

pOH = -log[OH-] = 5.70

pH = 14 - pOH = 8.30

c) a mixture of equal concentrations of both NaF and HF

pH = pKa

pKa = -log[Ka] = -log(3.5 x 10^-4) = 3.45

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Answer: (e) the number of neutrons in the nucleus of an atom of the element

Explanation: The given information tells us how many electrons the atom has, and since the atom is neutral then the atomic number is the same as the total number of electrons. This rules out answer a. It also tells us that the element has a full set of valence electrons, making it a noble gas and ruling out answer b because noble gasses are known to act differently to other elements. c is ruled out because we are given the number of electrons, allowing us to figure out how many electrons are in s orbitals. The same goes for option d. This leaves option e. e is the correct answer because the number of neutrons in the nucleus of an atom does not affect the number of electrons or the charge of the atom, meaning we have no way of finding it.

want to talk

Explanation:

The correct answer is d. None of the above, as the total mass and force of gravity do not change, while the total energy does change during energy conversions.

When energy is converted from one form to another in a chemical or physical change, the total mass in the system does not change. According to the law of conservation of mass, mass is neither created nor destroyed during a chemical or physical process. Therefore, the total mass in the system remains constant. Similarly, the force of gravity does not change during energy conversion. Gravity is a fundamental force that acts on objects with mass and is independent of the energy transformations occurring in the system. The force of gravity is determined by the masses of the objects involved and their distance from each other, but it is not influenced by energy conversions. The total energy in the system does change during energy conversions. Energy can be transferred or transformed from one form to another, but the total energy within a closed system is conserved according to the law of conservation of energy. The amount and type of energy may vary, but the total energy content remains constant. Therefore, the correct answer is d. None of the above, as the total mass and force of gravity do not change, while the total energy does change during energy conversions.

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Explanation:

de Broglie wavelength= h/mv

v=h/m x de Broglie wavelength

v= (6.626× 10^-34)/ (2347× 1.27 × 10^-38)

v= 22.229 m/s(according to Google scientific calculator)

am sorry I don't hv a calculator at hand

Mass of lead sulphate is 18.195g

Lead sulphate is the odorless and white crystalline powder and it is used to storage batteries as paint pigment and laboratory reagents

Given reaction is

Pb(NO₃)₂ +  H₂SO₄  → PbSO₄  + 2HNO₃

Here given data is

20 g of lead nitrate dissolved in water

And number of moles = mass/molar mass, molar mass = 331.2 g/mol

Number of moles of Pb(NO₃)₂  = 20g/331.2 g/mol

Number of moles of Pb(NO₃)₂  = 0.060g/mol

Therefore, 1 mole of Pb(NO₃)₂ will produce 1 mole of PbSO₄

0.060 mole of Pb(NO₃)₂ = 0.060 mol PbSO₄

Therefore, now we can calculate the mass :

And number of moles = mass/molar mass

Number of moles of  PbSO₄  = 0.060×303.26

Number of moles of  PbSO₄  = 18.195g

Mass of lead(II) sulfate would be produced by the action of excess dilute sulfuric acid on 20 g of lead nitrate dissolved in water is 18.195g

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Answer:

Exothermic Reaction

Product  = Calcium hydroxide + hydrogen

Explanation:

Answer:

4.90

Explanation:

10- 5.0

Explanation:

The molar volume corresponds to the volume occupied by any gas at STP, which is equal to 22.4 L.

So:

22.4 L ---- 1 mol

3.56 L ---- x mol

x = 0.159 moles

To find the molar mass we use the following formula:

molar mass = mass/moles

molar mass = 11.3/0.159

molar mass = 71.1

Answer: 71.1 g/mole

Answer:

0.745 moles

Explanation:

We can use the ideal gas law, which relates the pressure (P), volume (V), number of moles (n), and temperature (T) of a gas:

P V = n R T

where R is the gas constant.

We can rearrange this equation to solve for n:

n = (P V) / (R T)

We can look up the value of the gas constant for units of atm L / (mol K). The value is approximately 0.08206 (atm L) / (mol K).

Substituting the given values, we get:

n = (1.71 atm) * (12.85 L) / (0.08206 (atm L) / (mol K) * (68.16 + 273.15) K)

where we have converted the temperature from Celsius to Kelvin by adding 273.15.

Evaluating this expression gives us:

n ≈ 0.745 mol

Therefore, there are approximately 0.745 moles of gas in the sample.

The given reaction has ΔG value  -12207KJ. Therefore, the given reaction is a spontaneous reaction as value of ΔG is negative.

A spontaneous process refers to anything that happens by itself, without external energy input. A ball is going to roll down an incline, water will flow downhill, ice will melt into water, radioactive elements will decay, and iron will rust, for instance. It is impossible for a reaction to not be spontaneous if it is exothermic (H negative) and increases the entropy for the system (S positive). The system's overall heat capacity is measured in enthalpy. The system's unpredictability is gauged by entropy.

ΔG=ΔH-T×ΔS

ΔG=11-298×41

     = -12207KJ

Since ΔG is negative, reaction is spontaneous

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Oxygen get oxidized in the following redox reaction  2KCIO₃(g) = 2 KCI(g) + 3O₂(g).

Redox is a kind of chemical response wherein the oxidation states of substrate exchange. Oxidation is the lack of electrons or growth inside the oxidation nation of a chemical or atoms inside it.

An oxidation-reduction reaction is a type of chemical reaction that includes a switch of electrons among two species. An oxidation-reduction response is any chemical response wherein the oxidation number of a molecule, atom, or ion modifications through gaining or dropping an electron.

The time period oxidation turned into used to explain reactions wherein a detail combines with oxygen. for instance, the oxidation of magnesium includes the chemical reaction between magnesium metal and oxygen to shape magnesium oxide.

Left hand side: K = +1; O = -2; Cl = +5

Right hand side: K = +1; Cl = -1; O = 0

here, the oxidation state of O changes from -2 to 0.

Therefore, the oxygen gets oxidized.

Disclaimer:- your question is incomplete, please see below for the complete question.

Which element is oxidized in the following redox reaction?

2KCIO₃(g) = 2 KCI(g) + 3O₂(g)

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1. The IUPAC name of N is nitrogen.

2. Nitrogen dioxide

3.The IUPAC name of O is oxygen

4.The IUPAC name of OH is hydroxyl.

The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.

IUPAC names for the given compounds are:1.1. N: Nitrogen

The IUPAC name of N is nitrogen.

It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide

Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.

The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen

Explanation: The IUPAC name of O is oxygen.

It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.

X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.

Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.

It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.

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Note: The complete question is given below

Provide the IUPAC names for the following compounds:

\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)

C6H5CH(CH3)2

H2NCH2CH2CH2CH2CH2NH2

CH3CH2CH2CH2CH2OH

CH3CH2CH2CHOHCH3

Explanation:

for immiscible liquids it is quite easy to separate and the separating funnel can be used but for miscible liquid they form a single entity and separating them is quite impossible if the differences in temperature is not considered,so in distillation the one with lower boiling point evaporates out living behind the one with high boiling point

Answer:

- [ A/[A/nB]^1/1-n +  B/ [A/nB]^n/1-n].

Explanation:

The mathematical representation for the net potential energy as described in the Question above is given below as;

En = -A/r + B/r^n.

Therefore, let's call the equation above equation (1). Hence, there is the need to differentiate equation (1) above wrt r.

(NB: wrt = with respect to)

Thus, [dEn/ dr] = 0. -------------------------(2).

d [ - A/r + B/r^n]/ dr = 0. -------------------(3).

A/r^2 - nB/r^n+1 = 0 ------------------------(4).

r^2/r^n+1 = A/nB ----------------------------(5).

r^1-n = A/nB -----------------------------------(6).

(1 - n )ln r= ln A/nB ------------------------(7)

ln r = 1/1 - n ln [A/nB] ---------------------(8).

r = e^ln(A/nB)^1/1-n ----------------------(9).

r = [A/nB]^1/1-n. ---------------------------(10).

Thus, put the value in (10) above that is r = [A/nB]^1/1-n into equation (1).

Hence, the bonding energy = - [ A/[A/nB]^1/1-n +  B/ [A/nB]^n/1-n].

Answer

pH = 3.32

Explanation

Given

Acid dissociation of carbonic acid (Ka) = 4.4x10^-7

Concentration = 0.530 M

Solution

The carbonic acid dissociates into:

Now we can calculate the pH

pH = -log[H+]

pH = -log[4.816x10^-4]

pH = 3.32

The molar mass of MgCrO4 is approximately 140.30 g/mol.

To determine the molar mass of MgCrO4 (magnesium chromate), we need to calculate the sum of the atomic masses of each individual element in the compound.

The chemical formula MgCrO4 indicates that the compound consists of one magnesium atom (Mg), one chromium atom (Cr), and four oxygen atoms (O).

The atomic masses of the elements can be found on the periodic table:

Magnesium (Mg) has an atomic mass of approximately 24.31 g/mol.

Chromium (Cr) has an atomic mass of around 51.99 g/mol.

Oxygen (O) has an atomic mass of about 16.00 g/mol.

Now, we can calculate the molar mass of MgCrO4 by summing up the atomic masses of each element, considering the respective subscripts:

Molar mass = (Atomic mass of Mg) + (Atomic mass of Cr) + 4 × (Atomic mass of O)

Molar mass = (24.31 g/mol) + (51.99 g/mol) + 4 × (16.00 g/mol)

Molar mass = 24.31 g/mol + 51.99 g/mol + 64.00 g/mol

Molar mass ≈ 140.30 g/mol

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The birth weight of cats at the 90th percentile would be approximately 3.7 ounces. b. The birth weight of cats at the 10th percentile would be approximately 2.3 ounces.

There are three main methods of calculating weight:

1. Balance Beam Scale: A balance beam scale is an example of a mechanical weighing system. It uses a set of calibrated weights to measure the weight of an object.

2. Digital Scale: A digital scale uses an electronic or digital readout to display the weight of an object.

3. Calipers: Calipers are devices used to measure the distance between two points, such as thickness or diameter. They come in various sizes and shapes, depending on the type of measurement the user wants to take.

Birth weight is the weight of a baby at the time of birth. It is usually measured soon after delivery, with a special baby scale, though sometimes the baby's weight is estimated. The normal range of birth weight is anywhere between 5 lbs 8 oz and 10 lbs, though preterm or premature babies may be significantly lighter. A baby's birth weight is important because it can provide a clue to the baby's overall health. High birth weights may indicate an underlying medical condition, and low birth weights can be a sign of premature or difficult delivery and health risks associated with such a delivery.

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26.62 grams of HBr would be present in 355 mL of a 7.5% m/v HBr solution.

Concentration refers to the amount of a substance in a defined space. Another definition is that concentration is the ratio of solute in a solution to either solvent or total solution.

There are various methods of expressing the concentration of a solution.

Concentrations are usually expressed in terms of molarity, defined as the number of moles of solute in 1 L of solution.

Solutions of known concentration can be prepared either by dissolving a known mass of solute in a solvent and diluting to a desired final volume or by diluting the appropriate volume of a more concentrated solution (a stock solution) to the desired final volume.

Given,

HBr = 7.5% m/ v

This means 7.5g of HBr in 100 ml of the solution.

1 ml of the solution has 0.075g

355 ml of the solution will have = 0.075 × 355 = 26.62g of HBr

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A rainbow is produced through a proces that includes refraction, reflection, and dispersion of  sunlight.

A rainbow is formed when sulinght is refracted and reflected by rain drops in the atmospher.

The sunlight is split into its component colors, which is why rainbows appear as having an array of colors. This is due to each color being bent by a different amount during refraction.

The colors of a rainbow are always in the same order, with red on the outside and violet on the inside.

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Answer:

8.22 x 10²³ atoms O

Explanation:

To find the amount of oxygen atoms, you need to (1) convert the mass of  P₄O₆** to moles (using the molar mass), then (2) convert moles P₄O₆ to moles O (using mole-to-mole ratio within P₄O₆), and then (3) convert moles to atoms (using Avogadro's Number). It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs like the given value (50.0 = 3 sig figs).

Atomic Mass (P): 30.974 g/mol

Atomic Mass (O): 15.999 g/mol

Molar Mass (P₄O₆): 4(30.974 g/mol) + 6(15.999 g/mol)

Molar Mass (P₄O₆): 219.89 g/mol

1 mole P₄O₆ = 4 moles P and 6 moles O

Avogadro's Number:

6.022 x 10²³ atoms = 1 mole

 50.0 g P₄O₆            1 mole              6 moles O           6.022 x 10²³ atoms
---------------------  x  ------------------  x  --------------------  x  ------------------------------  =
                                219.89 g           1 mole P₄O₆                  1 mole

=  8.22 x 10²³ atoms O

**Phosphorus trioxide most commonly represents the molecule P₄O₆, but it can also represent P₂O₃. The answer would change depending on which molecule the question was referring to.

An example of heterogeneous equilibrium is:

Heterogeneous equilibrium refers to an equilibrium state in a chemical reaction where the reactants and products exist in different physical states or phases. It occurs when substances in different phases, such as solids, liquids, and gases, are involved in a chemical reaction.

Considering the given equations:

The equation I: FeO(s) + CO(g) ⇌ Fe(s) + CO₂(g) represents a heterogeneous equilibrium.

This is because the reactants and products involve different phases (solid and gas). FeO is a solid (s), CO is a gas (g), Fe is a solid (s), and CO₂ is a gas (g). The reaction involves the conversion of a solid and a gas to another solid and a gas, and the equilibrium is established between these different phases.

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