Which compound in each pair is more soluble in water?(a) Magnesium hydroxide or nickel(II) hydroxide

1. To construct 1 complete race car, you need:

3 bodies (B)

3 cylinders (Cy)

4 engines (E)

2 tires (Tr)

2.To construct 3 complete race cars, you need:

3 x 3 = 9 bodies (B)

3 x 3 = 9 cylinders (Cy)

3 x 4 = 12 engines (E)

3 x 2 = 6 tires (Tr)

3a.

Assuming that you have 15 cylinders and an unlimited supply of the remaining parts, we can make 5 cars.

3b.

In order to make 5 complete race cars, you would need:

5 x 3 = 15 bodies (B)

5 x 4 = 20 engines (E)

5 x 2 = 10 tires (Tr)

a. The number of complete race cars that can be made is limited by the number of cylinders available, as each car requires 3 cylinders.

The maximum number of complete race cars that can be made is therefore 15 / 3 = 5.

In order to make 5 complete race cars, you would need:

5 x 3 = 15 bodies (B)

5 x 4 = 20 engines (E)

5 x 2 = 10 tires (Tr)

Notably, all 15 cylinders would be used up in creating the 5 finished race cars, and each car required 4 engines but only 3 cylinders, thus neither more cylinders nor engines would be needed.

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If a metallic material is cooled through its melting temperature at an extremely rapid rate, it forms a noncrystalline solid (i.e., a metallic glass). will the electrical conductivity of the noncrystalline metal be less than its crystalline

Electrical conductivity is the conductivity is the measure of ease at which an electric charge or heat can pass through the material and electric conductivity will be less because this is because the metal will be without repeating form and will be randomized with dead ends and at the ends conductivity will be lost which is what results in the lower value

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A=a2+2aa2 4+h2=42+2442 4+5259.08132cm2 A is the area of the pyramid's base.

How can I determine the surface area of a square pyramid using the circumference of its base? A square pyramid's surface area is calculated by multiplying the base perimeter by the slant height, which is equal to half: SA = P × l / 2

The Pythagorean Theorem allows us to use the following formula to determine the slant height: H is the height of the square pyramid, so s2 = H2 + (a / 2)2 is the equation.

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The calculated maximum wavelength is 495 nm

The energy needed to break a bond and create two atomic or molecular fragments, each containing one of the original shared pair of electrons, is known as the bond dissociation energy. The link between silicon and fluorine, which was previously discussed, is discovered to be the strongest chemical bond. The initial silicon-fluorine bond in a silicon tetrafluoride molecule requires 166 kcal/mol of bond dissociation energy to be broken.

ΔH=+240 kJ/mol

E=242×103/6.022×1023

=4.0186×10−19 J

Now I use the Planck Expression:

E=hf=hc/λ

∴λ=hc

Eλ=6.63×10−34×3×108/4.0186×10-19 m

λ=4.949×10−7 m

λ=495 nm.

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Answer:

Option B is correct.

Explanation:

Since an iron nail is solid and have very large force of attraction between the particles therefore the particles can't move freely and could only vibrate at it's place.

Answer:

Option B is correct.

Explanation:

Since an iron nail is solid and have very large force of attraction between the particles therefore the particles can't move freely and could only vibrate at it's place.

The mass of 3.0 x 10²³ molecules of nitrogen gas is 13.95 g.

The mass of one mole of Nitrogen gas is 28 g/mol.

The number of atoms in one mole of Nitrogen gas is 6.022 x 10²³ molecules.

The mass of Nitrogen gas in the given number of molecules is calculated as follows;

6.022 x 10²³  --------------------- 28 g/mol

3.0 x 10²³ ----------------------------- ?

\(= \frac{3.0 \times 10^{23} \times 28}{6.022 \times 10^{23} } \\\\= 13.95 \ g\)

Thus, the mass of 3.0 x 10²³ molecules of nitrogen gas is 13.95 g.

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To supply oxygen to the body, the respiratory system works closely with the circulatory system. As oxygen is taken in into the lungs, it travels through blood vessels, which then circulate oxygen-rich blood to cells and tissues.

Answer:

I think its B

Explanation:

Answer:

Pretend you are a TV producer. Think of ideas for new TV shows. Your objective is to create ideas that will be successful, regardless of whether this is quality programming or not. Think of an idea of a copy. Explain the basics of what this show will be like and what show it is copying. Explain why you feel this show will be popular. Think of an idea of a spin-off. Explain the basics of what this show will be like and what show it is spinning off from. Explain why you feel this show will be popular. Think of an idea for a TV show that falls into one of the genre categories listed in the genre chart. Describe the basics of the show and how it falls under the genre’s expectations for characters, plots, and aesthetics. Explain why you feel this show will be popular.

Answer:

Bohr Model

Explanation:

Answer:

Theoretical 32.04 g

The precent yeild 87. 39 %

Explanation:

Mole of H2 = m/mw = 4/2 = 2 mol

From the equation

1 mol H2 --> 1/2 mol CH3OH

2 mol H2 -->??

So we have 1 mol Ch3oh

Mass of Ch3oh = mole *Mw = 1* 32.04

= 32.04g >>> the theoretically

For percent yeild = actual / theoretical * 100%

( 28.0/32.04) *100% =

87.93%

Answer: 15768 seconds

Explanation:            (50 years) x (365 da/yr) x (86,400 sec/da)

        =      (50 x 365 x 86,400)  seconds

        =        1.5768 x 10⁹ seconds

Among the following compounds, Sodium nitrate and CH₄ are neither an acid nor a base.

Sodium nitrate is an alkali metal salt which is made from the neutralization of a strong base (NaOH) with a strong acid (HNO₃). It has a pH value equal to 7. Therefore, sodium nitrate is neutral.

CH₄ has a neutral pH, of around 7. If a substance is acidic in nature, it must contain in the form where that can be released into water. But CH₄ is not acidic or basic as all the four hydrogen are bound tightly to the carbon atom and cannot be released, i.e., CH₄ has all of its valence electrons in bonding pair and bonding pairs are too stable to donate under normal conditions.

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Answer:

Zinc ions (Zn²+) do not decompose when heated, but hydrated zinc salts can lose water (H2O) molecules when heated, forming anhydrous salts.

Lead ions (Pb²+) can decompose when a lot of heat is added, producing lead oxide (PbO) and oxygen (O2) gas.

Iron ions (Fe³+) can undergo different reactions depending on the conditions. FeCl₃ (hydrated iron (III) chloride), for example can decompose when heated to produce anhydrous FeCl₃ and water vapor. But if Fe(OH)₃ (hydrated iron(III) hydroxide), is heated strongly, it decomposes to form Fe₂O₃ (iron oxide) and water vapor.

The behavior of hydrated salts when heated can vary depending on the specific compound but generally, hydrated salts lose their water (H2O) molecules on heating and become anhydrous salts.

answer is: O

o goes from 0 to -2, so it is the element that is reduced

hope this helps! ;)

Answer:

I'd say Mg.

Explanation:

The reducing agent is the agent that is oxidized (losses electrons).

The oxidizing agent is the agent that is reduced (gains electrons).

For the mentioned reaction:

2Mg + O2→ 2MgO.

Mg (oxid. no. = 0) is converted to MgO (oxid. no. of Mg = +2), which means that Mg losses 2 electrons and is oxidized.

So, the reducing agent is Mg.

In this reaction Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g) Magnesium acts as a reducing agent.

Only question should be of 4 or answer of other questions should also be there.

The volume of H₂ gas formed from 262 g of CH₄ reacting with excess H₂O at 423 K and 0.862 atm is 15,337 L.

To find the volume of H₂ gas formed, follow these steps:
1. Convert the mass of CH₄ (262 g) to moles using its molar mass (16.05 g/mol): 262 g / 16.05 g/mol = 16.32 moles CH₄
2. Determine the stoichiometry from the reaction equation: 1 mol CH₄ produces 4 mol H₂
3. Calculate moles of H₂ produced: 16.32 moles CH₄ * 4 mol H2/mol CH₄ = 65.28 moles H₂
4. Use the ideal gas law, PV = nRT, where P = 0.862 atm, V = volume (L), n = 65.28 moles H₂, R = 0.0821 L atm/mol K, and T = 423 K.
5. Solve for V: V = nRT/P = (65.28 moles H2)(0.0821 L atm/mol K)(423 K) / 0.862 atm = 15,337 L
The volume of H₂ gas formed is 15,337 L.

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a. radon (Rn) is noble gas with atomic number 86 b. xenon (Xe) is noble gas with atomic number 54. c. neon (Ne) is noble gas with atomic number 10.

a) Francium (Fr) is element with atomic number 87 (87 protons and 87 electrons).

Electron configuration of francium atom:                                                   ₈₇Fr 1s²2s²2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁶ 7s¹ or [Rn] 7s¹, radon (Rn) is noble gas with atomic number 86.

b) Mercury (Hg) is element with atomic number 80 (80 protons and 80 electrons). Electron configuration of mercury atom:                                                  ₈₀Hg 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² or [Xe] 4f¹⁴ 5d¹⁰ 6s², xenon (Xe) is noble gas with atomic number 54.

c) Silicon (Si) is element with atomic number 14 (14 protons and 14 electrons).Electron configuration of silicon atom: ₁₄Si 1s² 2s² 2p⁶ 3s² 3p² or [Ne] 3s² 3p², neon (Ne) is noble gas with atomic number 10.

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If a wave has a frequency of 670 Hz, Therefore, 0.0014 Hz⁻¹ is the period of the wave.

The period corresponds to the space of time between waves if you were standing on something like a dock and they were hitting you. In other terms, the period of both the wave is the amount of time between the crests of successive waves.

The relationship between a wave's frequency and period is close.

period of the wave = 1/ frequency of the wave

period of the wave = 1/  670

                              =0.0014 Hz⁻¹

Therefore, 0.0014 Hz⁻¹ is the period of the wave.

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Answer:

Zinc Carbonate

Zinc Nitrate

Explanation:

Answer:

The number of moles in 89 grams of KCl is approximately 1.193 moles

Explanation:

A mole of an element or compound, is the quantity of the element or compound that contains 6.022 × 10²³ molecules of the element or compound, such that the molar mass of one mole is dependent on the mass of each molecule of the element or compound that make up the 6.022 × 10²³ particles

The given parameters are;

The mass of the KCl = 89 grams

The Molar mass, MW, of potassium, K = 39.1 g/mole

The Molar mass, MW, of chlorine, Cl = 35.5 g/mole

Therefore, given that KCl, has one K and one Cl, per mole, we have;

The Molar mass, MW, of potassium chloride, KCl = (39.1 + 35.5) g/mole = 74.6 g/mole

\(The \ number \ of \ moles, n=\dfrac{Mass}{Molar \ mass, MW}\)

Therefore, the number of moles of KCl in 89 g, 'n' is given as follows;

n = (89 g)/(74.6 g/mole) ≈ 1.193 moles

The number of moles in 89 grams of KCl, n ≈ 1.193 moles.

When lithium metal reacts with oxygen gas, the product formed is lithium peroxide (Li2O2). The correct answer is E) Lithium peroxide.

When lithium metal reacts with oxygen gas, the resulting substance is lithium peroxide (Li2O2). This reaction occurs due to the high reactivity of lithium, which readily reacts with oxygen to form a compound.

The balanced chemical equation for the reaction is:

4Li + O2 -> 2Li2O2

In this reaction, each lithium (Li) atom combines with one oxygen (O2) molecule to form lithium peroxide (Li2O2). The stoichiometric ratio shows that four lithium atoms react with one oxygen molecule, resulting in the formation of two molecules of lithium peroxide.

Lithium peroxide is a compound that consists of lithium ions (Li+) and peroxide ions (O22-). It is a white solid with the chemical formula Li2O2.

When lithium metal reacts with oxygen gas, the product formed is lithium peroxide (Li2O2). It's important to note that lithium can react with oxygen in different conditions and form other lithium oxides, such as lithium oxide (Li2O) or lithium superoxide (LiO2), depending on factors like temperature and pressure.

However, in the given options, the closest match to the actual product formed is lithium peroxide (E).

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moles = mass / molar mass We know the moles of oxytocin acetate recovered (2.2 x 10^-6 moles) and its molar mass (1067 g/mol). We need to find the mass of the oxytocin acetate in the solution, and from there we can determine the volume of the solution.

mass = moles x molar mass
mass = 2.2 x 10^-6 moles x 1067 g/mol
mass = 2.3454 x 10^-3 g

Now, we need to take into account the 10 mM Zn2+ additive. We don't know the exact concentration of the oxytocin solution, but we can assume that the 10 mM Zn2+ additive does not significantly change the volume of the solution. Therefore, we can calculate the volume of the solution using the mass of oxytocin acetate and its concentration in the original sample.Let's assume that the original sample had a concentration of 1 mM (this is just an example, the actual concentration could be different). This means that there was 1 mmol of oxytocin acetate per liter of solution. To find the volume of the solution that was analyzed, we can use the following formula:
volume = mass / (concentration x molar mass)
volume = 2.3454 x 10^-3 g / (1 x 10^-3 mol/L x 1067 g/mol)
volume = 2.3454 x 10^-6 L or 2.3454 µL
Therefore, the approximate volume of the oxytocin solution with the 10 mM Zn2+ additive that was analyzed is 2.3454 µL.

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The approximate volume of the oxytocin solution with the 10 mM Zn²⁺ additive that was analyzed is 2.3454 µL.

moles = mass / molar mass

We know the moles of oxytocin acetate recovered (2.2 x 10⁻⁶ moles) and its molar mass (1067 g/mol).

mass = moles x molar mass

mass = 2.2 x 10⁻⁶ moles x 1067 g/mol

mass = 2.3454 x 10⁻³ g

Utilizing the mass of oxytocin acetate and its concentration in the first sample, we can determine the volume of the solution. Assume for the sake of argument that the first sample had a concentration of 1 mM (the real concentration may have been different).

This indicates that each litre of solution contained 1 mmol of oxytocin acetate. Using the following formula, we can get the volume of the solution that was examined:

volume = mass / (concentration x molar mass)

volume = 2.3454 x 10⁻³ g / (1 x 10⁻³ mol/L x 1067 g/mol)

volume = 2.3454 x 10⁻⁶ L or 2.3454 µL

Therefore, the approximate volume of the oxytocin solution with the 10 mM Zn²⁺ additive that was analyzed is 2.3454 µL.

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A potassium atom's ground state electron configuration is 1s2, 2s2, 2p6, 3s2, 3p6, 4s1.

An atom's electron configuration is a picture of how electrons are arranged in relation to orbital shells and subshells. Consequently, this is potassium's electron configuration.

Making Electron Configurations in Writing. Write the energy level (the period) first, then the subshell that needs to be filled, and finally the superscript, which indicates how many electrons are in that subshell. The atomic number, Z, is the sum of all the electrons.

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Answer:

Explanation:

Speed and velocity I think

Explanation:

marble is the correct answer

Answer:

Elephant

Explanation:

An elaphant is the option with the most mass.

Hope this helps! Please makr brainliest! Stay safe, God bless and happy studying!