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How could you give a pendulum more energy?

Answer:

22.77 g.

he limiting reactant is O₂, and the excess reactant is Mg.

Explanation:

Mg + 1/2O₂ → MgO,

1.0 mole of Mg reacts with 0.5 mole of oxygen to produce 1.0 mole of MgO.

no. of moles of Mg = mass/molar mass = (16.3 g)/(24.3 g/mol) = 0.6708 mol.

no. of moles of O₂ = mass/molar mass = (4.52 g)/(16.0 g/mol) = 0.2825 mol.

So. 0.565 mol of Mg reacts completely with (0.2825 mol) of O₂.

∴ The limiting reactant is O₂, and the excess reactant is Mg (0.6708 - 0.565 = 0.1058 mol).

Using cross multiplication:

1.0 mole of Mg produce → 1.0 mol of MgO.

∴ 0.565 mol of Mg produce → 0.565 mol of MgO.

∴ The amount of MgO produced = no. of moles x molar mass = (0.565 mol)(40.3 g/mol) = 22.77 g.

Answer:

[tex]m_{MgO}=11.3gMgO[/tex]

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

[tex]2Mg+O_2\rightarrow 2MgO[/tex]

Hence, for given amounts of magnesium and oxygen, one computes the available moles of magnesium with its given mass and atomic mass and the moles of magnesium that will completely react with 4.52 g of oxygen by using their 2:1 molar ratio in the chemical reaction in order to identify the limiting reactant:

[tex]n_{Mg}^{available}=16.3gMg*\frac{1molMg}{24gMg}=0.679molMg\\\\n_{Mg}^{reacted}=4.52gO_2*\frac{1molO_2}{32gO_2}*\frac{2molMg}{1molO_2} =0.2825molMg[/tex]

In such a way, as just 0.2825 moles of magnesium react, magnesium is identified as the excess reactant and the oxygen the limiting reactant. Furthermore, with the reacting moles, one computes the yielded grams of magnesium oxide as:

[tex]m_{MgO}=0.2825molMg*\frac{2molMgO}{2molMg}*\frac{40gMgO}{1molMgO} \\\\m_{MgO}=11.3gMgO[/tex]

Best regards.

it wouldnt have an effect?

Answer:

B.

Explanation:

The neutron/proton ratio for a certain element must fall within a certain range for the element to be stable. That’s why some isotopes of an element are stable and others are radioactive.

Spontaneous decay of certain elements in nature occurs because these elements have disproportionate ratios of neutrons to protons. Thus, option B is correct.

Radio active decay is a process in which unstable nuclei will convert into stable nuclei by the emission of some particles in the form of radiations.

Unstable nature of nuclei is due to the presence of inappropriate ratio of neutrons to protons inside the nucleus. So these type of molecules shows spontaneous decay to attain stability.

Hence, the reason is the disproportionate ratios of neutrons to protons. Thus, option B is correct.

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Answer:

[tex]\boxed{\text{Six}}[/tex]

Explanation:

Carbon is element number six, so it has six protons.

[tex]\boxed{\textbf{A neutral atom of carbon then has six electrons.}}[/tex]

Great Question! i'm going to break this down first. So the earth spins on its pole which is called the axis and every 24 hours the earth makes a full rotation on it. Remember, the sun and the moon don't move around our planet. We get our light and darkness because the Earth spins and when it does, the moon is on one side and the sun is on the other. Let's get back to your question. "Why Do We Need Timezones?" We need them because if all the people on Earth set the clocks to the same time, noon would be the middle of the day in some places but in other places, it would be morning evening and the middle of the night. Since different parts of our Earth enter and exit daylight we need different timezones. That is why we have 24 time zones on planet Earth.

Answer:

Oh, I don't run

Explanation:

Alex Russo

Elizabeth is getting ready to run a marathon, her thinking incorrect due to lack of training and unrealistic Expectations.

Lack of Training: Marathon runners need to be properly trained and condition themselves. Elizabeth's reasoning can be flawed if she hasn't had enough training since she might underestimate the physical difficulties and the risks involved in the marathon. Without adequate training, she can experience fatigue, injuries, or other health problems while competing.

Elizabeth might have exaggerated expectations on how well she will perform in the marathon. She would be mistaken in her reasoning, for instance, if she thought she could run the marathon in a relatively short amount of time without any training or prior experience. Setting reasonable objectives that take into account one's ability and level of fitness is crucial.

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Answer:

4.2 × 10⁻¹⁴s⁻¹

Explanation:

Given parameters:

Wavelength of light = 7.1 x 10²nm

We simplify and express this value in metres(m) to give:

⇒7.1 x 10² x 10⁻⁹m = 7.1 x 10⁽⁻²⁺⁹⁾ m

= 7.1 x 10⁷m

The wavelength is 7.1 x 10⁷m

We use the formula V = fλ

We know that Velocity of light is 3 x 10⁸ms⁻¹

Making f, frequency the subject of the formula gives :

f = V/λ

f = 3 x 10⁸ms⁻¹ / 7.1 x 10⁷m

f = 4.2 x 10⁻¹⁴s⁻¹

The frequency of light with a wavelength of 7.1 × 10² nm is 4.23 × 10^14 s⁻¹.

The frequency of light with a wavelength of 7.1 × 10² nm can be calculated using the formula:

$$ \nu = \frac{c}{\lambda} $$

where c is the speed of light (3.00 × 10^8 m/s) and λ is the wavelength in meters.

Plugging in the values, we get:

$$ \nu = \frac{3.00 \times 10^8 \, \text{m/s}}{7.1 \times 10^{-9} \, \text{m}} = 4.23 \times 10^{14} \, \text{s}^{-1} $$

Therefore, the frequency of light with a wavelength of 7.1 × 10² nm is 4.23 × 10^14 s⁻¹.

Answer:

0.1612 mol.

Explanation:

2Ca₃(PO₄)₂ + 6SiO₂ + 10C → 6CaSiO₃ + P₄ + 10CO.

2.0 moles of Ca₃(PO₄)₂ react with sufficient SiO₂ and C to produce 1.0 mole of P₄ and other products.

no. of moles of Ca₃(PO₄)₂ = mass / molar mass = (100.0 g)/(310.18 g/mol) = 0.3224 mol.

Using cross-multiplication:

2.0 moles of Ca₃(PO₄)₂ produce → 1.0 mole of P₄.

0.3224 mole of Ca₃(PO₄)₂ produce → ??? mole of P₄.

∴ The no. of moles of phosphorous (P₄) will be produced = (1.0 mole)(0.3224 mole)/(2.0 mole) = 0.1612 mol.

Answer:Sulfur dioxide

CID: 1119

Molecular Formula: SO2 or O2S

UNII:0UZA3422Q4

Chemical Names: sulfur dioxide sulphur dioxide Sulfurous anhydride 7446-09-5 Sulfurous oxide More...

Molecular Weight: 64.058 g/mol

Explanation: can i have brailyest plz

Answer:

SO2

Explanation:

Answer:

None of the above.

Explanation:

The limiting factor of this  is the chlorine. You only have 2 moles of chlorine.

2Na + Cl_2 ==> 2*NaCl

The equation tells you that for every mol of Cl2 that you have, you require 2 moles of Na and you get 2 moles of NaCl

So what that means is that if you have 2 mols of Cl2, you need just 4 moles of Na, and you will get 4 mols of NaCl

Since 4 is not one of your choices, the answer is none of the above

Answer:

a habitat

Explanation:

The correct answer is shelter and their right climate is another need of animals.

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Answer:

Substance with a nonpolar covalent bonds is [tex]Cl_2[/tex].

Explanation:

Polar covalent compound: This compound is formed when difference in electronegativity between the atoms is present. When atoms of different elements combine, it results in the formation of polar covalent bond. For Example: [tex]CO_2,NO_2[/tex] etc..

Non-polar covalent compound: This compound is formed when there is no difference in electronegativity between the atoms. When atoms of the same element combine, it results in the formation of non-polar covalent bond. For Example: [tex]N_2,O_2[/tex] etc.

Substance with a nonpolar covalent bonds is [tex]Cl_2[/tex].

Among the options, Cl2 is the only substance that contains nonpolar covalent bonds because the two chlorine atoms share the pair of electrons equally having the same electronegativity.

The substance that contains nonpolar covalent bonds among the listed options is Cl2. Nonpolar covalent bonds occur when two atoms share a pair of electrons equally, usually seen in diatomic elements or compounds with the same elements. In Cl2, two chlorine atoms share the pair of electrons equally since they have the same electronegativity, hence, it forms a nonpolar covalent bond.

On the other hand, SO3, SiO2, and CCl4 contain polar covalent bonds because the bonding electrons are not shared equally due to a difference in electronegativity of the atoms involved.

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Answer:

Aluminium oxide

Explanation:

This is not an element but a coumpound.

Al is Aluminum

And O is Oxygen

Answer:6

Explanation:

U welcome

Answer:NaCl (Sodium Chloride )

Explanation:As it has Solubility 35.7

Answer:

NaCl

Explanation:

Answer:

The fraction remaining of a sample that is 5 half lives old is 0.03125.

Explanation:

So, it will decay as:

1.0 → (first half life) 0.5 → (second half-life) 0.25 → (third half-life) 0.125 → (fourth half-life) 0.0625 → (fifth half-life) 0.03125.

So, the rraction remaining of a sample that is 5 half lives old is 0.03125.

Great Question!

The Answer Would Be "B" The "RESPONDING" Variable

The variable that a scientist observes to change while conducting an experiment is called the responding variable.

Answer:

The metal is not gold.

Explanation:

Density (d) = mass/volume

∴ d of metal =  mass/volume = (8.7 g)/(3.2 mL) = 2.72 g/mL.

So, the metal is not gold.

The term for an underground stem that sends up new plants at intervals is a rhizome, while a stem that does this above ground is referred to as a stolon or runner.

The term that best describes an underground stem that grows along, sending up new plants at intervals, is a rhizome. Rhizomes are modified stems that grow horizontally underground and can branch at nodes to produce new plants. A well-known plant that reproduces from rhizomes is the iris. However, if the stem grows above the ground, it's called a stolon or runner, like those seen in strawberry plants. These runners develop adventitious roots at their nodes, and the axillary buds can turn into independent plants.

Another form of modified stem includes corms, which are fleshier and store food, and unlike rhizomes and stolon, don't typically give rise to new plants at intervals along their length.

Answer:

1.  A.  silicon dioxide

2. D.  Hydrogen

Explanation:

Answer:

The whale shark's teeth are an example of vestigial structures. If an inherited feature is no longer needed but also not harmful, there's no evolutionary pressure to get rid of it.- A.

Answer:

The correct answer is option A, that is, the whale shark's teeth are an example of vestigial structures. If an inherited feature is no longer needed but also not harmful, there's no evolutionary pressure to get rid of it.

Explanation:

The vestigial structures refer to the compositions, which exhibit no ostensible activity and seems to be the leftover components from a past ancestor. Some of the examples of vestigial parts are the pelvic bone of a snake, the human appendix, and the wings of flightless birds.

yes because the

0。5 that's left may stop the batter from over flowing

Final answer:

To find the volume of the balloon when it burst at 99 mmHg, we use Boyle's Law. The final volume was calculated to be approximately 28.28 liters.

Explanation:

The volume of the balloon when it burst at 99 mmHg atmospheric pressure can be determined using Boyle's Law, which states that the product of pressure and volume is constant for a given mass of enclosed gas when the temperature is constant (P1V1 = P2V2).

Here, we know the initial pressure (P1) is 700.0 mmHg, the initial volume (V1) is 4.0 liters, and the final pressure (P2) upon bursting is 99 mmHg. To find the final volume (V2), we rearrange the equation to V2 = (P1V1) / P2 and substitute the known values. Doing so gives us V2 = (700.0 mmHg × 4.0 L) / 99 mmHg, which calculates to a volume of approximately 28.28 liters.

Answer:

1. Equilibrium shifts to (lift side) produce more reactant.

2. Exothermic reaction, Equilibrium shifts to (lift side) produce more reactant.

3. Increasing the pressure will shift the reaction to the side with lower moles of gas (right side).

4. Le Châtelier's principle states that when there is an dynamic equilibrium, and this equilibrium is disturbed by an external factor, the equilibrium will be shifted in the direction that can cancel the effect of the external factor to reattain the equilibrium.

Explanation:

1. How will the equilibrium be affected by adding more of the product?

This will increase the concentration of the products side, so the reaction will be shifted to the lift side (reactants side) to suppress the increase in the concentration of Products.

So, the right choice is: Equilibrium shifts to produce more reactant.

2. Is the reaction endothermic or exothermic? How will the equilibrium be affected by adding heat?

Since the sign of ΔH is negative, the reaction is exothermic reaction.

The reaction can be represented as:

PCl₃ (g) + Cl₂ (g) ↔ PCl₅ (g) + heat.

Adding heat:

Adding heat is like adding more product to the reaction, so the reaction will be shifted to the lift side (reactants side) to suppress the effect of adding heat.

So, the right choice is: Equilibrium shifts to the lift side (produce more reactant).

3. How will the equilibrium be affected by increasing the pressure on the closed system?

When there is an increase in pressure, the equilibrium will shift towards the side with fewer moles of gas of the reaction. And when there is a decrease in pressure, the equilibrium will shift towards the side with more moles of gas of the reaction.

So, increasing the pressure will shift the reaction to the side with lower moles of gas (right side).

4. Explain the principle that you used in determining how the equilibrium is affected.  

Answer:

13. 2.60 L.

14. 2.40 L.

Explanation:

We can use the general law of ideal gas: PV = nRT.

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R is the general gas constant,

T is the temperature of the gas in K.

If n and T are constant, and have different values of P and V:

(P₁V₁) = (P₂V₂)

13. A gas occupies 4.31 liters at a pressure of 0.755 atm. Determine the volume if the  pressure  is increased to 1.25 atm.

P₁ = 0.755 atm, V₁ = 4.31 L.

P₂= 1.25 atm, V₂ = ??? L.

∴ V₂ = (P₁V₁)/(P₂) = (0.755 atm)(4.31 L)/(1.25 atm) = 2.60 L.

14. 600.0 mL of a gas is at a pressure of 8.00 atm. What is the volume of the gas at 2.00  at m.

P₁ = 8.0 atm, V₁ = 600.0 mL.

P₂= 2.0 atm, V₂ = ??? L.

∴ V₂ = (P₁V₁)/(P₂) = (8.0 atm)(600.0 mL)/(2.0 atm) = 2400/0 mL = 2.40 L.

Using Boyle's law, which states that the pressure and volume for a gas is a constant if the temperature is constant, we can determine that the new volume of the gas occupying 4.31 liters at 0.755 atm when the pressure is increased to 1.25 atm is 2.62 L. Similarly, when the pressure of a gas occupying 600.0 mL at 8.00 atm is reduced to 2.00 atm the new volume will be 2400 mL.

To solve these problems, we can use the principles of Boyle's law, which states that the product of the pressure and volume for a gas is a constant if the temperature and the amount of gas remain unchanged. In other words, P1*V1 = P2*V2.

Problem 13

Let's use Boyle's law to calculate the new volume (V2) when the pressure (P2) is increased to 1.25 atm (P2). We know that the initial volume (V1) is 4.31 L, and the initial pressure (P1) is 0.755 atm.

V2 = P1*V1/P2 = (0.755 atm * 4.31 L) / 1.25 atm = 2.62 L

The initial volume (V1) is 600 mL and the initial pressure (P1) is 8.00 atm. The new pressure (P2) is 2.00 atm. So, we can calculate the new volume (V2) as:

V2 = P1*V1/P2 = (8.00 atm * 600.0 mL) / 2.00 atm = 2400 mL

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Answer:

36.0%.

Explanation:

The mass of water = mass of hydrated copper (II) sulfate - mass of copper (II) sulfate after heating = 4.56 g - 2.92 g = 1.64 g.

The percent by mass of water in the hydrate = (mass of water/mass of hydrated copper (II) sulfate)*100 = (1.64 g/4.56 g)*100 = 35.96% ≅ 36.0%.

Answer:

I think it is A.

Explanation:

Hope my answer has helped you!

A:Coefficients B:Element C:subscripts D:Reactants E:Products

Answer:

The carbon cycle is the biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth.

The carbon cycle is a biological and geological system composed of two interconnected sub-cycles - the biological carbon cycle and the biogeochemical carbon cycle. The biological carbon cycle involves the exchange of carbon among living organisms through processes like photosynthesis and respiration, while the biogeochemical carbon cycle involves the long-term cycling of carbon through the Earth's atmosphere, water bodies, and interior. Human activities like burning of fossil fuels can accelerate these cycles and contribute to global climate change.

The carbon cycle is a type of system in biology that can be broadly divided into two interconnected sub-cycles. One sub-cycle deals with the rapid exchange of carbon among living organisms, and the other deals with the long-term cycling of carbon through geologic processes. These processes together help in the transfer and recycling of carbon in different forms throughout the ecosystem.

In the Biological Carbon Cycle, living organisms play a crucial role. Autotrophs, like plants, absorb carbon dioxide from the atmosphere and convert it into glucose through photosynthesis. This glucose is used by heterotrophs, like animals, for their energy needs. In this process, carbon gets incorporated in their bodies. When these animals die, the carbon gets returned to the atmosphere through decomposition. Moreover, marine autotrophs obtain carbon dioxide in the dissolved form (carbonic acid, H₂CO3). Through this biological carbon cycle process, photosynthetic organisms are responsible for maintaining approximately 21 percent of the Earth's oxygen content.

In the Biogeochemical Carbon Cycle, carbon is stored in what are known as carbon reservoirs that include the atmosphere, bodies of liquid water (mostly oceans), ocean sediment, soil, land sediments (including fossil fuels), and the Earth's interior. Over longer periods, microorganisms capable of digesting non-bioavailable carbon like coal can release it as gas, making it available for other living organisms. This process accelerates when humans burn fossil fuels, releasing large amounts of carbon dioxide into the atmosphere. Most scientists agree that the high atmospheric carbon dioxide is a major cause of global climate change.

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Answer: Flowing Water

Explanation:

Answer: Flowing Water

Explanation: