an example of measurement replication would be measuring the temperature of boiling water at home and measuring the temperature of boiling water in martin hall. True or False

Answer:

CH3 is a methyl group

Explanation:

A methyl group is an alkyl derived from methane, containing one carbon atom bonded to three hydrogen atoms — CH3.

1. The temperature rose faster in the covered box.

2. The temperature rose higher in the covered box.

3. The temperature in both boxes decreased after removing them from the sunlight.

4. This experiment demonstrates how a greenhouse traps heat inside, causing the temperature to rise.

5. The bottom of the box represents the Earth's surface, the air in the box represents the Earth's atmosphere, and the plastic wrap represents the greenhouse gases that trap heat.

6. You can compare your results with another student to see if your findings are similar or different.

7. From this investigation, you can learn about how greenhouse gases trap heat and cause the Earth's temperature to rise.

What is  greenhouse ?

A greenhouse is a structure designed to control the environment for growing plants. It is typically made of glass or other transparent material, and traps heat from the sun, creating a warm and humid environment inside. This helps to extend the growing season and protect plants from extreme weather conditions.

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Long-range order is best found in crystalline solids. Crystalline solids are characterized by a highly ordered arrangement of atoms or molecules in a repeating pattern called a crystal lattice. Option 2)

Long-range order is best found in crystalline solids. Crystalline solids are characterized by a highly ordered arrangement of atoms or molecules in a repeating pattern called a crystal lattice. The arrangement of the particles in a crystalline solid extends over long distances, resulting in a well-defined and repetitive structure.

In contrast, amorphous solids lack long-range order. They do not possess a well-defined crystal lattice or a regular arrangement of particles. The atoms or molecules in amorphous solids are arranged in a more random and disordered manner, leading to a lack of long-range order.

Thermal plasmas and nonthermal plasmas, on the other hand, are states of matter where the atoms or molecules are highly ionized, resulting in the formation of charged particles or ions. While plasmas can exhibit certain levels of order, they do not possess the same level of long-range order as crystalline solids.

Therefore, crystalline solids are the primary location where long-range order is typically found. Option 2)

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Note Complete Question

Which of the following best identifies where long-range order would be found?

1) in amorphous solids

2) in crystalline solids

3) in thermal plasmas

4) in nonthermal plasmas

OPTION B. Long-range order is most commonly found in crystalline solids, where atoms or molecules are arranged in a well-defined, consistent pattern. Amorphous solids and plasmas do not showcase this characteristic.

Long-range order pertains to the organization and regularity of constituents over large scale distances. It's a term often associated with the structure of crystalline solids. This is due to the fact that their atoms or molecules are arranged in a well-defined and repeated pattern extending in all three spatial dimensions over the length of the solid. On the contrary, an amorphous solid does not have a long-range order, instead, its structure is only ordered on a short range. Plasmas, both thermal or nonthermal, are an ionized gas and do not exhibit long-range order, primarily due to their high level of kinetic energy and lack of fixed positions for particles.

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The jumbled word "gzeysktqix" can be unscrambled to form the word "skyzigtext."

Here are possible words that can be made from this jumbled word:

Sky: Referring to the atmosphere above the Earth.

Zig: Describing a series of sharp turns or angles.

Text: Referring to written or printed words.

Six: The number following five and preceding seven.

It seems that the jumbled word has provided a mix of letters that can be rearranged to form these words. This exercise is likely intended to enhance the student's vocabulary skills, spelling ability, and problem-solving skills. By unscrambling the letters, the student is encouraged to explore different word possibilities and apply their knowledge of language. It also promotes critical thinking and creativity as they find valid words from the given set of letters.

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Answer: I already gave u the aNswer

Explanation:0  ok bye

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Answer:

umm i am not sure i really understand the question but uranium has the highest number of Protons. It has a total of 92 protons. And if that doesn't work than the Atomic number should tell the number of protons are in the element

Explanation:

H will have the longest wavelength emission line for the transition between the n initial = 2 and n final = 1 levels.

A movement (or leap) of an electron from one energy level to another within an atom or artificial atom is referred to as an atomic electron transition. It seems discontinuous because the electron "jumps" from one quantized energy level to another in a matter of nanoseconds or less.

Electronic transitions occur in atoms and molecules as a result of electromagnetic radiation absorption or emission (typically UV or visible). Planck's equation, E = h, relates the energy change associated with a transition to the frequency of an electromagnetic wave. Transitions between these permitted orbits occur in photon absorption or emission. A photon is released when an electron transitions from a higher-energy orbit to a more stable orbit.

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Answer:

\(\boxed {\boxed {\sf 7.89*10^{-4} \ mol \ Pb}}\)

Explanation:

To convert from moles to atoms, we must use Avogadro's Number. Avogadro's Number

1. Set up ratio

We can use Avogadro's Number as a fraction or ratio.

\(\frac{6.022*10^{23} \ atoms \ Pb}{1 \ mol \ Pb}\)

2. Convert atoms to moles

Multiply the given number of atoms by the ratio.

\(4.75 *10^{20} \ atoms \ Pb *\frac{6.022*10^{23} \ atoms \ Pb}{1 \ mol \ Pb}\)

Flip the fraction so that the atoms of lead can cancel each other out.

\(4.75 *10^{20} \ atoms \ Pb *\frac{1 \ mol \ Pb}{6.022*10^{23} \ atoms \ Pb}\)

\(4.75 *10^{20} *\frac{1 \ mol \ Pb}{6.022*10^{23} }\)

\(\frac{4.75 *10^{20} \ mol \ Pb}{6.022*10^{23} }\)

\(7.88774494*10^{-4} \ mol \ Pb\)

3. Round

The original measurement of 4.75 had 3 significant figures (4, 7, and 5).

We must round our answer to 3 sig figs, which is the hundredth place for the number found.

\(7.88774494*10^{-4} \ mol \ Pb\)

The 7 in the thousandth place tells us to round the 8 up to a 9 in the hundredth place.

\(7.89*10^{-4} \ mol \ Pb\)

There are 7.89*10⁻⁴ moles of lead in 4.75*10²⁰ atoms of lead.

(A) Possible Galvanic cells:

Li(s) | Li+ solution || H+ solution | H2(g) | Pt(s)

Half-cell reactions: Li(s) → Li+(aq) + e-; 2H+(aq) + 2e- → H2(g)

Overall reaction: 2Li(s) + 2H+(aq) → 2Li+(aq) + H2(g)

Eºcell = -3.04 V

Zn(s) | Zn2+ solution || H+ solution | H2(g) | Pt(s)

Half-cell reactions: Zn(s) → Zn2+(aq) + 2e-; 2H+(aq) + 2e- → H2(g)

Overall reaction: Zn(s) + 2H+(aq) → Zn2+(aq) + H2(g)

Eºcell = -0.76 V

Zn(s) | Zn2+ solution || O2(g) | H2O(l) | Pt(s)

Half-cell reactions: Zn(s) → Zn2+(aq) + 2e-; O2(g) + 4H+(aq) + 4e- → 2H2O(l)

Overall reaction: Zn(s) + O2(g) + 4H+(aq) → Zn2+(aq) + 2H2O(l)

Eºcell = 1.56 V

(B) The most powerful reducing agent is the one with the lowest Eo value, indicating the greatest proclivity to lose electrons and experience reduction. Based on the Galvanic cells, Li has the most negative Eo value (-3.04 V), making it the most powerful reducing substance.

(c). we can use Faraday's laws of electrolysis to calculate the current and the amount of H₂ gas produced:

Calculate the number of electrons transferred:

From the balanced reaction, we see that 2 moles of electrons (4 e⁻) are transferred for each mole of H₂ produced.

The mass of Zn consumed in 2 hours is 50 g, which is equivalent to 50/65.38 = 0.765 moles of Zn (where 65.38 g/mol is the molar mass of Zn).

Therefore, the total number of electrons transferred is 4 x 0.765 = 3.06 moles of electrons.

Calculate the current:

Faraday's first law states that the amount of chemical change in an electrolytic cell is proportional to the amount of electricity that flows through the cell.

The proportionality constant is the Faraday constant, which is equal to 96,485 C/mol e⁻.

Therefore, the total charge (Q) required to transfer 3.06 moles of electrons is:

Q = 3.06 x 96,485 = 295,038 C

The time (t) taken for this charge to flow through the circuit is 2 hours = 7,200 seconds.

Therefore, the current (I) is:

I = Q/t = 295,038/7,200 = 40.97 A

Calculate the amount of H₂ gas produced:

From the balanced reaction, we know that 1 mole of H₂ gas is produced for every 2 moles of electrons transferred.

Therefore, the number of moles of H₂ gas produced is:

0.765 moles of Zn x (1 mole of H₂/2 moles of electrons) = 0.383 moles of H₂ gas

The molar mass of H₂ is 2 g/mol, so the mass of H₂ gas produced is:

0.383 moles of H₂ gas x 2 g/mol = 0.766 g of H₂ gas

Therefore, the Galvanic cell produces 0.766 g of H₂ gas when it consumes 50 g of Zn metal for 2 hours at a current of 40.97 A.

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Reagents that are entirely consumed by a chemical reaction are known as limiting reagents.

Thus, They are additionally known as limiting reactants or limiting agents. A predetermined quantity of reactants are necessary for the reaction to be completed, according to the stoichiometry of chemical reactions.

In the aforementioned reaction, 2 moles of ammonia are created when 3 moles of hydrogen gas react with 1 mole of nitrogen gas.

In most cases, this reactant dictates when the reaction will end. The reaction stoichiometry can be used to determine the precise quantity of reactant that will be required to react with another element. The limiting agent is determined by the mole ratio rather than the mass of the reactants.

Thus, Reagents that are entirely consumed by a chemical reaction are known as limiting reagents.

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Answer:

\(\Delta _rS\°=-2965.27J/K\)

Explanation:

Hello,

In this case, for the considered reaction, the standard reaction entropy is computed considering the standard entropy of each product and reactant and their stoichiometric coefficients as shown below:

\(\Delta _rS\°=8*S\°_{SF_6}-S\°_{S_8}-24*S\°_{F_2}\)

Thus, considering the ALEKS Data tab, we obtain:

\(\Delta _rS\°=8*(291.52J/K)-(430.23J/K)-24*(202.8J/K)\\\\\Delta _rS\°=-2965.27J/K\)

Regards.

Answer:

There are 2 moles of gas on the left side of the equation (PCl3 and Cl2) and only 1 mole of gas on the right side (PCI5). Therefore, when the container is expanded, the equilibrium will shift to the right to produce more moles of gas and reduce the pressure. So, the correct answer is A: the reaction will shift to the right (products) to produce more moles of gas.

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The branched alkanes in boxes two and three all have molecular formula C6H14 and are isomers of the compound shown.

Isomers are compounds that has the same molecular formula but different structural formulas. Hence, isomers of compounds can be represented by the same molecular formula since they contain the same number of each atom.

The molecule shown has molecular formula C6H14. The branched alkanes in boxes two and three all have molecular formula C6H14 and are isomers of the compound shown.

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Answer:

The correct answer is 0.4 L.

Explanation:

The mentioned question can be solved by using the equation,  

C = K × Pgas--------(i)

Here K is the Henry law constant whose value is 0.158 mol/L/atm, C is the concentration of the gas in liquid state, and Pgas is the partial pressure of the gas.  

Now to find the volume of water, the formula to be used is,  

PV = nRT-----------(ii)

Here P is the pressure of the gas, V is the volume, R is the universal gas constant whose value is 0.082 Latm/mol/K and T is the temperature.  

PgasV = nRT

Pgas = nRT/Vgas

The value of Pgas is inserted in equation (i) we get,  

C = K × nRT/Vgas

It is to be noted that C = n/V, here n is the no. of the moles and V is the volume of liquid.  

n/Vliquid = K × nRT/Vgas

1/Vliquid = KRT/Vgas

Vliquid = Vgas/KRT--------------(iii)

Based on the given information, the volume of the gas is 1.52 L, the value of K is 0.158 mol/L/atm, the value of R is 0.082 Latm/mol/K and value of T is 21 degree C or 273 + 21 = 294 K.  

Now putting the values in equation (iii) we get,  

Vliquid = 1.52 L / 0.158 × 0.082 × 294

Vliquid = 1.52 / 3.809

Vliquid = 0.399 or 0.4 L

Hence, the volume of water required to dissolve 1.52 L of gas is 0.4 L.  

Answer:

A chemical bond is a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds.

Explanation:

The bond may result from the electrostatic force of attraction between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds.

Answer:

A scientist added bacteria and a nutrient medium that could support the growth of the bacteria to a sterilized petri dish. No other materials were added. The graph models growth of the bacteria over time. ... The bacteria did not reproduce in the system, and eventually each individual died at the end of its life cycle.

Explanation:

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The concentration of NaCl (salt) when 4.9 moles are dissolved in 7 liters of water is 34.3M

Molarity is a unit of concentration measuring the number of moles of a solute per litre of solution.

Chemists primarily need the concentration of solutions to be expressed in a way that accounts for the number of particles that react according to a particular chemical equation. Since percentage measurements are based on either mass or volume, they are generally not useful for chemical reactions. A concentration unit based on moles is preferable.

Given,

Moles of NaCl = 4.9 moles

Volume = 7 L

Concentration = moles × volume (L)

= 34.3 M

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1.

Type of reaction: Double displacement

the possible quantum numbers (ordered n, ℓ, mℓ ) are:Option B.5, 3, -3 and Option C. 4, 3, -2

The quantum numbers n, ℓ, mℓ represent respectively the principal quantum number, the orbital angular momentum quantum number and the magnetic quantum number.

These are the three most important quantum numbers. T

here is another quantum number called the spin quantum number, denoted by ms.

Let's see which of the given quantum number sets is possible.2, 1, 3 is not possible because for ℓ = 1, mℓ can only be -1, 0, or 1. 5, 3, -3 is possible.4, 3, -2 is possible. -4, 3, 1 is not possible.

For any value of ℓ, mℓ must be between -ℓ and +ℓ. e. 2, 1, -2 is not possible because for ℓ = 1, mℓ can only be -1, 0, or 1. f. 3, 2, 2 is not possible because for ℓ = 2, mℓ can only be -2, -1, 0, +1, or +2. g. 3, 3, 1 is not possible because for any value of ℓ, mℓ must be between -ℓ and +ℓ.

Therefore, the possible quantum numbers (ordered n, ℓ, mℓ ) are:5, 3, -34, 3, -2

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Answer:

A.) pure substance

Explanation:

edge 2021

Explanation:

using boyles law

p1v1=p2v2

735 x 1.76 = 700 x V2

1293.6 = 700 x V2

V2 = 1293.6/700

V2 = 1.85L

Answer:

yes

Explanation:

but not much

Answer:

Yes they do in a less rate

Answer:

0.8853 mL

Explanation:

First we convert 13 lb to kg, keeping in mind that 1 lb = 0.454 kg:

Then we calculate how many mg of acetaminophen should be given, using the recommended dose and infant mass:

Finally we calculate the required mL of suspension, using its concentration:

Answer:

If there are more products than reactants, that means the reaction has shifted towards the left, which is the backward direction. If there are more reactants than products, that means the reaction has shifted towards the right, which is the forward direction.

Answer:

Ni²⁺ and Cl⁻ ions

Explanation:

NiCl₂ is an ionic compound which is composed by 2 chloride ions (Cl⁻) and 1 nickel (II) ion (Ni²⁺). It dissociates in water as follows:

NiCl₂ ⇒ Ni²⁺ + 2 Cl⁻

Therefore, in an aqueous solution of NiCl₂ will be present Ni²⁺ ions and Cl⁻ ions.

Answer:

SnS

Explanation:

Tin(II) sulfide is a chemical compound of tin and sulfur. The chemical formula is SnS. Its natural occurrence concerns herzenbergite, a rare mineral.

Answer:

SnS

Explanation:

Tin, as it shows on the periodic table can have a +2 or +4 charge.

Sulfide is just Sulfur which has a -2 charge.

It tells us the charge of the tin in roman numerals. In this case (II) means two, so it is tin with a charge of two.

In order for these to balance each other, we are going to take one of the tin and one of the sulfur because it the +2 and -2 add to zero.

Answer:

2.77×2= 5.4 mol Ag can be obtained

The molarity of a solution that contains 35.00 g of CuSO4 dissolved in 250.0 mL of water is 0.88M.

The molarity of a solution can be calculated using the following formula:

Molarity = no of moles/volume

According to this question, a solution consists of 35.00 g of CuSO4 dissolved in 250.0 mL of water.

no.of moles of CuSO4 = 35g ÷ 159.6g/mol

no. of moles of CuSO4 = 0.22 moles

Therefore; molarity of CuSO4 solution is calculated as follows:

M = 0.22 ÷ 0.25

M = 0.88M

Therefore, the molarity of a solution that contains 35.00 g of CuSO4 dissolved in 250.0 mL of water is 0.88M.

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