Please help me!!!!
What is the order in which types of elements are found as you move from top
to bottom among the main groups?
A. Metals, nonmetals, metalloids
B. Nonmetals, metals, metalloids
C. Metals, metalloids, nonmetals
D. Nonmetals, metalloids, metals

Answer:

This reaction is both precipitation reaction as well as double displacement reaction.

In a double displacement reaction the anions are exchanged and in a precipitation reaction, a precipitate is formed in the end. In this case, AgCl is the precipitate.

Explanation:

The answer is yes. Adding O2 to a fire, feeds a fire creating bigger flames or almost completely burning a building,.. etc....

depending on what kind of structure.

little O2 usually makes a fire burn itself out because there is not enuf oxygen or its contained...

The stoichiometric ratio of NaHCO₃ to CH₃COOH, which is determined by the balancing equation, is 1:1, meaning that 1 mole of NaHCO₃ reacts with 1 mole of CH₃COOH.

Acetic acid (CH₃COOH), a component of vinegar, interacts with sodium bicarbonate (NaHCO₃) in baking soda to produce water, carbon dioxide gas, and sodium acetate.

CO₂(g) + H₂O(l) + NaC₂H₃O₂ = NaHCO₃(aq) + HC₂H₃O₂(aq) when yellow bubbles appear, an acidic gas H₂CO₃ has generated as a result of the reaction between CO₂ and water. The salt in the solution (NaC₂H₃O₂) is basic since the solution is red in colour.

To know more about stoichiometric visit:-

https://brainly.com/question/29856106

#SPJ1

The compound has the molecular formula CH₄O. H : O = 1 : 4 : 1 As a result, the empirical formula is CH₄O.

The organic compound sample's mass is 0.5 g, or (0.188 + 0.062 + 0.25) The vapor density should not have a unit.

The organic compound has a molar mass = 16 × 2 g/mol

                                                                            = 32 g/mol

Moles of C atoms = (32 g) × (0.188/0.5) / (12 g/mol) = 1

Moles of H atoms = (32 g) × (0.062/0.5) / (1 g/mol) = 4

Moles of O atoms = (32 g) × (0.25/0.5) / (16 g/mol) = 1

Hence, molecular formula = CH₄O

Thus, the compound has the molecular formula CH₄O. H : O = 1 : 4 : 1 As a result, the empirical formula is CH₄O.

Organic molecules contain covalently bound carbon and hydrogen as well as frequently additional elements. Benzoic acid, diethyl malonate, propanoic acid, butanoic acid, malonic acid, amines, heterocyclic compounds, and benzoic aldehyde are all examples of organic compounds. Organic substances include the carbohydrates, fats (lipids), proteins, and nucleic acids that make up the components of life. Organic molecules include petroleum and natural gas, which constitute the majority of fossil fuels.

Learn more about organic compounds :

brainly.com/question/5994723

#SPJ1

Answer: 177.23 g.

Explanation:

the volume of the aluminum bar is

1.7 cm x 3.0 cm x 12.9 cm

= 65.61 cm^3

2.7 g/cm^3 x 65.61 cm^3

177.23g

The frequency (in hertz) of the x-ray having a wavelength of 4.73×10⁻¹⁴ hectometers is 6.34×10¹⁹ Hertz

Frequency is defined as the number of complete oscillations made in 1 second.

However, the frequency of a wave is related to wavelength according to the following formula:

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

v = λf

With the above formula, we can determine the frequency of the x-ray. Details below:

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

3×10⁸ = 4.73×10⁻¹² × frequency

Divide both sides by 4.73×10⁻¹²

Frequency = 3×10⁸ / 4.73×10⁻¹²

Frequency = 6.34×10¹⁹ Hertz

Thus, we can conclude, the frequency is 6.34×10¹⁹ Hertz

Learn more about frequency:

https://brainly.com/question/15326129

#SPJ1

The wavelength of the radiation emitted by the argon ion laser is \(4.854 * 10^-7 m\).

Wavelength is a property of any type of wave that refers to the distance between two adjacent points on the wave that is in phase, i.e., at the same point in their respective cycles. It is usually denoted by the Greek letter lambda (λ) and is measured in units of length, such as meters or nanometers.

The energy carried by the photon (E) is related to the wavelength (\(\lambda\)) through the following equation:

\(E=hc/\lambda\); where 'h' is the Plank's Constant and 'c' is the speed of light which is \(3* 10^{-7} m/s\).

We can say that

\(\lambda - hc/E\)

Now after substituting the given values, we get:

\(\lambda = (6.626 * 10^{-34} J.s * 3.00 * 10^8 m/s) / (4.071 * 10^{-19} J)\\\lambda = 4.854 * 10^-7 m\)

Therefore the wavelength of the radiation emitted by the argon ion laser is \(4.854 * 10^-7 m\).

Learn more about the Plank's Constant at:

https://brainly.com/question/28060145

#SPJ4

Answer & Explanation:

Scientists can use radiometric dating to reconstruct the geologic history of the area and support or reject their hypothesis of a disappearing and reappearing lake by analyzing the sediments and other geological features present in the area. Radiometric dating, such as carbon-14 dating, can determine the age of the sediments, fossilized remains, and other materials. By analyzing the age and composition of these materials, scientists can track changes in the environment over time, including periods of drought or increased precipitation that could cause a lake to dry up or reform.

To ensure the accuracy of their radiometric dating, scientists can use calibration methods, such as cross-dating with other dating techniques like dendrochronology (tree-ring dating), or comparing their results with well-dated samples from similar or nearby environments. This can help validate the radiometric dating results and provide more confidence in the reconstructed geologic history and any conclusions drawn from it regarding the presence or absence of a lake in the area at different times.

Answer:

Na2O2

Explanation:

Molecular Formula= Molar Mass/Empirical formula mass

To find empirical formula it is atomic weight of each element times the subscript added together. so since no subscript just mass of the elements added together

Na=23

O=16

23+16=39

78/39 = 2

2 times each element and thats the subscript

Answer:

It's B

Explanation:

It's the sun's gravitational pull that keeps our planets revolving around it and as soon as it's gone it's a high chance of it being a pinball machine and everything colliding into each other.

Answer:

the generation of electricity and other energy jointly, especially the utilization of the steam left over from electricity generation to produce heat.

I hope it helps!! Have a nice day

Answer:

Cogeneration r is the use of a heat engine or power station to generate electricity and useful heat at the same time.

Answer:

option d is right

Explanation:

More precipitation occurs near the equator because it is a tropical area. Mountains receive less than 15 inches of rain per year while the equator area receives a lot of rain. This is due to the very hot weather.

The climate around the equator will have more precipitation because it is very hot.

thats the answer

Answer:

1. \(\rho=8.06g/cm^3\)

2. \(H=10cm\)

Explanation:

Hello,

1. In this case, since the volume of the rock is obtained via the difference between the volume of the cylinder with the water and the rock and the volume of the cylinder with the water only:

\(V=21.4mL-18.3mL=3.1mL\)

Thus, the density turns out:

\(\rho=\frac{m}{V}=\frac{25g}{3.1cm^3} \\\\\rho=8.06g/cm^3\)

2. In this case, given the density and mass of aluminum we can compute its volume as follows:

\(V=\frac{m}{\rho}=\frac{1080g}{2.7g/cm^3}=400cm^3\)

Moreover, as the volume is also defined in terms of width, height and length:

\(V=W*H*L\)

The height is computed to be:

\(H=\frac{V}{L*W}=\frac{400cm^3}{5cm*8cm}\\ \\H=10cm\)

Best regards.

I cant really help you tight now sorry

For each compound, the states (aq) for aqueous, or dissolved in water, and (s) for solid, or precipitate created, are used to denote their states.

A mixture made up of a sodium nitrate solution and a copper(II) hydroxide precipitate is created when copper(II) nitrate and sodium hydroxide solutions are combined.

KOH and Cu(NO3)2 react, and the balanced equation for the reaction is

2KOH(aq) + Cu(NO3)2(aq) Cu(OH)2(s) + 2KNO3 (aq)

Copper(II) hydroxide (Cu(OH)2) and potassium nitrate are produced in this reaction between potassium hydroxide (KOH) and copper(II) nitrate (Cu(NO3)2) (KNO3).

To know more about aqueous visit:-

https://brainly.com/question/30215562

#SPJ1

Answer:

a PE teacher would be in both catagories  of heath and fitness

Explanation:

This extremely high temperature indicates that under normal conditions, you do not need to worry about your car tire bursting from overheating as it is unlikely to reach such extreme temperatures.

To determine the temperature at which the tire will burst, we can use the ideal gas law equation:

PV = nRT

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Rearranging the equation to solve for temperature, we have:

T = PV / (nR)

Given that the pressure threshold for bursting is 1.4 x 10^3 kPa, the volume is 30 L, and the number of moles of air is 2.5 mol, we can substitute these values along with the ideal gas constant R = 8.314 J/(mol K) into the equation.

T = (1.4 x 10^3 kPa) * (30 L) / (2.5 mol * 8.314 J/(mol K))

Converting kPa to Pa and L to m^3, and simplifying the equation, we find:

T ≈ 20,993 K

This extremely high temperature indicates that under normal conditions, you do not need to worry about your car tire bursting from overheating as it is unlikely to reach such extreme temperatures.

For more question on temperatures

https://brainly.com/question/4735135

#SPJ8

At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

For more such questions on equilibrium, click on:

https://brainly.com/question/517289

#SPJ8

11.) Non polar, equally, Charged.

12.) Ionic, Cation, Positive, anion, negative

13.) electronegative, Polar

14.) So

15. weak, HCl or N2

A covalent bond between C and H is Non Polar. It is called that,because electrons are shared Equally between these two atoms.C and H,are not Charged

12. An Ionic bond is formed when an electron is transferred from one atom to another.

The atom that loses an electron is called Cation and has charge positive. The

atom that gains an electron is called anion and has negative charge.

13. A hydrogen bond is formed between a H in one molecule and an Electronegative atom in

another molecule. The H can make an H-bond only if it is found in a Polar covalent

bond, in its own molecule.

H-bonds give So many of its special properties.

A van der Waals interaction is the Weak type of bond. All molecules form these

bonds. These interactions become important when found in great numbers. The often help the

3D shape of large molecules such as HCL or N2

Learn more about covalent bond here:

https://brainly.com/question/3447218

#SPJ9

Known :

M1 = 2 M

V1 = 100 mL

M2 = 4 M

Solution :

M1 • V1 = M2 • V2

(2 M)(100 mL) = (4 M)(V2)

V2 = 50 mL

Considering the definition of dilution, 50 mL of a 4 M HCl solution you will require.

When it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In this case, you know:

Replacing in the definition of dilution:

2 M× 100 mL= 4 M× Vf

Solving:

Vf= (2 M× 100 mL)÷ 4 M

Vf= 50 mL

In summary, 50 mL of a 4 M HCl solution you will require.

Learn more about dilution:

brainly.com/question/20113402?referrer=searchResults

brainly.com/question/22762236?referrer=searchResults

#SPJ2

Since, 2AgBr + Na₂S₂O₃ → Ag₂S₂O₃ + 2NaBr

Ag₂S₂O₃= 327.74 g / mol

AgBr= 187.70 g / mol

Hence, amount of Ag₂S₂O₃ formed in this chemical reaction is 200g.

What is a chemical reaction?

To know more about chemical reactions, click the link given below:

https://brainly.com/question/29039149

#SPJ4

Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

Answer:

Fluorine

Explanation:

Electronegativity increases as you go from left to right across the periodic table and decreases as you go from top to bottom of the periodic table.

Fluorine is in period 3, group 17

Radium is in period 7, group 2

Radium is in period 7 and we know that electronegativity decreases as you move from top to bottom.

Explanation: As you move from top to bottom, you are in higher energy level, which means that your distance from the nucleus is further away.

Answer:

Fluorine

General Formulas and Concepts:

Chemistry

Explanation:

The Periodic Trend for Electronegativity is up and to the right of the Periodic Table.

Fluorine is Element 9 and has 9 protons. Radium is Element 88 and has 88 protons. Therefore, Radium has a bigger Zeff than Flourine.

However, since Radium is in Period 7 while Fluorine is in Period 2, Radium has more core e⁻ than Fluorine does. This will create a much larger shielding effect, causing Radium's outermost e⁻ to have less FOA between them. Fluorine, since it has less core e⁻, the FOA between the nucleus and outershell e⁻ will be much stronger.

Therefore, Fluorine would attract an electron more than Radium, thus bringing us to the conclusion that Fluorine has a higher electronegativity.

The molecular mass of \(K_{2}Cr_{2}O_{7}\) is \(294.1846g/mol\). \(Cr\) will have \(1 mole\)

This compound is known as potassium dichromate. Convert \(K_{2}Cr_{2}O_{7}\) between grams and moles or vice versa.

The quantity (\(10\)) of material having \(6.023*10^{23}\) particles is known as a mole. \(6.023*10^{23}\) elements make up one mole. Avogadro's number is another name for this integer. We should be aware that the meaning of a mole is a quantity of a substance.

In the given question,

The chemical formula of potassium dichromate is K2Cr2O7, which indicates that it contains 2 moles of potassium (K), 2 moles of chromium (Cr), and 7 moles of oxygen (O).

Therefore, in 1.0 mol of K2Cr2O7, there are 2 moles of chromium (Cr).

To learn more about moles

brainly.com/question/26416088

#SPJ9

The molecular formula of the compound containing 81.82% carbon

and 18.18% hydrogen by mass is C₃H₈

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

Carbon (C) = 81.82%

Hydrogen (H) = 18.18%

Molar mass of compound = 44 g/mol

We'll begin by calculating the empirical formula of the compound. This can be obtained as follow:

Carbon (C) = 81.82%

Hydrogen (H) = 18.18%

Divide by their molar mass

C = 81.82 / 12 = 6.818

H = 18.18 / 1 = 18.18

Divide by the smallest

C = 6.818 / 6.818 = 1

H = 18.18 / 6.818 = 2.67

Multiply by 3 to express in whole number

C = 1 × 3 = 3

H = 2.67 × 3 = 8

Thus, the empirical formula of the compound is C₃H₈

Finally, we shall determine the molecular formula of the compound. This can be obtained as follow:

Molecular formula = Empirical formula × n = molar mass

[C₃H₈]n = 44

[(12×3) + (1×4)]n = 44

[36 + 4]n = 44

40n = 44

Divide both side by 40

n = 44/40

n ≈ 1

Molecular formula = C₃H₈ × n

Molecular formula = C₃H₈ × 1

Therefore, the molecular formula of the compound is C₃H₈

Learn more: https://brainly.com/question/13208888

Answer:

ok, here is your answer

Explanation:

i am going to solve this problem by using the ICE table method which is an easy method to determine the pH of a weak base with the given data of the problem.Given:Initial volume of NH3 solution (Vi) = 75.0 mLInitial concentration of NH3 solution (Ci) = 0.200 MInitial moles of NH3 solution (Ni) = Ci x Vi = 0.200 M x 75.0 mL = 0.0150 molesKb = 1.8 x 10^-5Moles of HNO3 added (n) = 0.500 M x 17.0 mL = 0.00850 molesVolume of NH3 solution after the addition of HNO3 (Vf) = 75.0 mL + 17.0 mL = 92.0 mLConcentration of NH3 solution after the addition of HNO3 (Cf) = Ni / Vf = 0.0150 moles / 92.0 mL = 0.163 MTo find the pH after the addition of 17.0 mL of HNO3, we need to use the ICE table method.ICE table method:Initial: NH3 + H2O ⇌ NH4+ + OH-Change: -x 0 +x +xEquilibrium: 0.0150 - x 0 x xKb = [NH4+][OH-] / [NH3]1.8 x 10^-5 = x^2 / 0.163Solving for x, x = 0.00171 M[OH-] = 0.00171 M[OH-] = Kw / [H3O+] = 1.0 x 10^-14 / [H3O+][H3O+] = 5.85 x 10^-12pH = -log[H3O+]pH = -log(5.85 x 10^-12)pH = 11.23Therefore, the pH after the addition of 17.0 mL of HNO3 is approximately 11.23.

Answer:

The three major types of bond are ionic, polar covalent, and covalent bonds. Ionic occurs majorly between metals and non-metals, which allows sharing of electrons to form an ionic compound. Whereas covalent bonding calls for complete transfer of electrons between atoms. Polar covalent bonds have unequaly shared electron-pair between two atoms.

Explanation:

a. Cu (Copper)- ionic bonding

b. KCl (Potassium Chloride) - ionic bonding

c. Si (Silicon) - covalent bonding

d. CdTe (Cadmium Telluride) - polar covalent bonding

e. ZnTe (Zinc Telluride)- polar covalent bonding