Which best explains parallel

Answer:

the answer is copper pipe

The numbers (4.64 x \(10^{15\)) + (8 × \(10^{12\) ) will be simplified as scientific notation as \(4.6 X 10^{15\).

To add these two numbers, we need to make sure they have the same exponent. We can convert 8 × \(10^{12\) to scientific notation with the same exponent as 4.64 × 10¹5:

8 × \(10^{12\) = 0.008 × \(10^{15\)

Now we can add the two numbers:

(4.64 ×  \(10^{15\)) + (0.008 × \(10^{15\)) = 4.648 ×  \(10^{15\)

Thus, we can simplify this answer by rounding to two significant figures and expressing it in scientific notation: 4.6 ×  \(10^{15\).

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The effort needed when a simple machine is used is best described by (c) the effort force is most often smaller than the force needed without the machine.

Simple machines, such as levers, pulleys, and inclined planes, are designed to amplify or redirect forces, making it easier to perform work. They achieve this by distributing the force over a larger distance or by changing the direction of the force. In doing so, simple machines decrease the amount of effort needed to accomplish a task.

One fundamental principle of simple machines is the conservation of energy. While the effort force may be reduced, the total amount of work remains constant. This means that although the effort force may be smaller, the distance over which the force is applied is proportionally increased. As a result, the total work done, which is the product of force and distance, remains the same.

It is worth noting that there may be certain scenarios where the effort force is greater than the force needed without the machine. These cases typically involve complex or inefficient configurations of simple machines, where mechanical advantage is not fully utilized. However, in most practical applications, when simple machines are properly employed, the effort force is most often smaller than the force needed without the machine.

Therefore, the statement "The effort force is most often smaller than the force needed without the machine" accurately describes the effort needed when a simple machine is used.

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Based on how chemical equations are written, the given chemical reaction: Four atoms of aluminum metal react quickly with 3 molecules of oxygen in the air to produce 2 molecules of aluminum oxide can be written as follows:

Word equation: Aluminum metal + oxygen gas ---> Aluminum oxide

Reactants: Aluminum metal and oxygen gas

Products: Aluminum oxide

Known states of matter: solid + gas ---> solid

Equation: 4 Al (s) + 3 O₂ (g) ---> 2 Al₂O₃ (s)

A chemical reaction is a type of change that results in changes in the chemical properties of substances.

Chemical reactions involve the rearrangement of atoms of substances and result in the formation of new substances.

Chemical reactions can be represented by a chemical equation.

Chemical equations use symbols to represent the reactants and the products of a reaction.

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First, we need to write out the balanced chemical equation for the reaction: 4 KO2 + 2 CO2 → 2 K2CO3 + 3 O2

From the equation, we can see that 4 moles of KO2 react with 2 moles of CO2 to produce 3 moles of O2. Therefore, we need to convert the given masses of KO2 and CO2 into moles:

moles of KO2 = 2.61 g / molar mass of KO2 = 2.61 g / 71.10 g/mol = 0.0367 mol
moles of CO2 = 4.46 g / molar mass of CO2 = 4.46 g / 44.01 g/mol = 0.1013 mol

Next, we need to determine the limiting reagent (the reactant that will be completely consumed in the reaction) by comparing the mole ratios of KO2 and CO2 in the balanced equation. The ratio of moles of KO2 to moles of CO2 is:
0.0367 mol KO2 / 4 mol KO2 per 2 mol CO2 = 0.0184 mol CO2

Since this ratio is less than the actual number of moles of CO2 we have (0.1013 mol), CO2 is in excess and KO2 is the limiting reagent.

Using the mole ratio from the balanced equation, we can calculate the number of moles of O2 produced:

moles of O2 = 3 mol O2 per 4 mol KO2 × 0.0367 mol KO2 = 0.0275 mol O2

Finally, we can convert the moles of O2 to grams:

mass of O2 = moles of O2 × molar mass of O2 = 0.0275 mol × 32.00 g/mol = 0.88 g
Therefore, 2.61 g of KO2 and 4.46 g of CO2 would produce 0.88 g of O2.

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Answer:

Calcium, Magnesium, Barium, strontium, Beryllium, Radium

Explanation:

sorry if im wrong.....:(

Answer:

TRUE

Explanation:

All carboxylic acid derivatives have in common the fact that they undergo hydrolysis (a cleav- age reaction with water) to yield carboxylic acids. with hydroxide ion to yield a carboxylate salt and an alcohol. The carboxylic acid itself is formed when a strong acid is subsequently added to the reaction mixture.

PLS MARK BRAINLIEST

As a result, the ideal gas law is applied, and the pressure of the gas in the container is 1.44 atm.

The Kelvin temperature and hence the volume are going to be in direct proportion when the pressure on a sample of a dry gas is held constant, according to the definition of the Charles Law Formula. PV = k is the law's equation, and k might be a constant.

This issue can be resolved by applying the ideal gas law:

PV = nR

T = -52 °C + 273.15 = 221.15 K

n = 0.642 mol

V = 8.6 L

T = 221.15 K

\(R = 0.0821 L·atm/mol·K (gas constant for ideal gases)\)

PV = nRT

P = nRT/V

P = (0.642 mol)(0.0821 L·atm/mol·K)(221.15 K)/(8.6 L)

P = 1.44 atm

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Answer:

Mg S2 O3

Explanation:

.691 g of Mg  is .284 mole

1.84 g of S    is .5739 mole

1.365 g of O is  .8531 mole      you can see the ratio is ~  1 :2 :3

                                                        Mg S2 O3

Answer:

the electron will be drawn more toward the atom with the higher e lectronegativity resulting in a polar covalent bond.

Explanation:

When atoms of different elements share electrons through covalent bonding, the electron will be drawn more toward the atom with the higher e lectronegativity resulting in a polar covalent bond. When compared to ionic compounds, covalent compounds usually have a lower melting and boiling point, and have less of a tendency to dissolve in water.

Answer:

neutral/no charge

Explanation:

1) Determine the number of subatomic particles.

A subatomic particle is smaller than an atom. Protons, neutrons, and electrons are subatomic particles.

Mass number: 28

This number is the number of protons plus neutrons in the nucleus.

Atomic number: 14

This is the number of protons in the nucleus.

Neutrons = mass number - atomic number

Neutrons = 28 - 14 = 14.

Electrons. = atomic number - charge

Electrtons = 14 - 0 = 14

This species of Silicon has 14 protons, 14 neutrons, and 14 electrons.

To calculate the moles of H+ and OH-, you need to know the concentration of the solution in terms of its pH or pOH value.

When you get the pH of the solution, you can use this formula to calculate the concentration of H+ ions: [H+] = 10^(-pH)

Also, if you know the pOH of the solution, you can use this formula to calculate the concentration of OH- ions: [OH-] = 10^(-pOH)

Having determined the concentration of H+ and OH- ions, the molarity formula can be used to calculate the number of moles of each ion as follows: moles = concentration (in mol/L) x volume (in L)

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Answer: There are \(17.6\times 10^{23}\) alumnium ions in 1.46 mol \(Al_2S_3\)

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number \(6.023\times 10^{23}\) of particles.

1 mole of \(Al_2S_3\) contains = 2 moles of \(Al^{3+}\) ions

Thus 1.46 mole of \(Al_2S_3\) contains = \(\frac{2}{1}\times 1.46=2.92\) moles of \(Al^{3+}\) ions

Now 1 mole of \(Al^{3+}\) contains = \(6.023\times 10^{23}\) \(Al^{3+}\) ions

Thus 2.92 moles of \(Al^{3+}\) contains = \(\frac{6.023\times 10^{23}}{1}\times 2.92=17.6\times 10^{23}\) \(Al^{3+}\) ions.

There are \(17.6\times 10^{23}\) alumnium ions in 1.46 mol \(Al_2S_3\)

Answer:

See explanation

Explanation:

The boiling point of  a substance at a location depends mostly on the atmospheric pressure in that location. The lower the atmospheric pressure in a location, the lower the boiling point and vice versa.

Boiling point is defined as the temperature at which the vapor pressure of the liquid becomes equal to the atmospheric pressure.

In Denver (the mile high city), alcohol will boil at a lower temperature(due to its high altitude) than in Houston because pressure decreases with height.

The boiling point of alcohol in Houston and Denver will vary as a result of the difference in atmospheric pressure.

The boiling point of  a compound at a particular location depends on the

atmospheric pressure of that location. The lower the atmospheric pressure

of a given place or area, the lower the boiling point and vice versa.

In Denver (the mile high city), alcohol will boil at a lower temperature as a

result of its higher altitude than in Houston because atmospheric pressure

decreases with increase in height and vice versa.

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The name of the compound from the structure that we can see in the question is;

4,4-dibromohex-2one

The International Union of Pure and Applied Chemistry (IUPAC) established a systematic set of guidelines for naming organic compounds.

Find the compound's longest continuous chain of carbon atoms. The compound's name is derived from this chain, which also acts as the compound's parent chain.

Assign a number to each carbon atom in the parent chain to give each carbon atom in the compound a special identification. The end that is closest to the functional group or substitutes is where the numbering begins.

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Answer:

1. True

2. resting position

3. 5 cm

4. Compressions

5. false

6. 7 m

7. true

8. second one has more amplitude

9. True

10. true

Explanation:

The mass of water that can be heated from 15.0° C to 43.1° C by the addition of 1282J is 10.9grams.

The mass of water can be calculated using the following expression;

Q = mc∆T

Where;

According to this question, a sample of water can be heated from 15.0° C to 43.1° C by the addition of 1282J. The mass of the substance can be calculated as follows;

1282 = m × 4.184 × (43.1 - 15)

1282 = 117.57m

m = 10.9grams

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Answer:

D. Compressibility​

Explanation:

Answer:

so 0.71 g/L

Explanation:

C =n/v n= to 0.355

v= 0.500L

The concentration of Na⁺ ions in the dilutes solution of 0.500 L is 0.131 molar.

Molarity is a concertation term for solutions. Mathematically it is the ratio of no. of moles of solute to the volume of solution in liter.

Molarity = (no.of moles / volume of solution in L)

Given that the volume of NaCl is 0.185 L and have a concentration of 0.355 M. The solution is diluted to 0.500 L , then the new concentration is calculated as follows:

M1 V1 = M2V2

(0.185 L × 0.355 M) = (0.500 L × M2), where M2 have to be calculated.

M2 = (0.185 × 0.355)/0.500 = 0.131 M

The concentration of Na⁺ will be one times the concentration of NaCl. Since the no.of moles of sodium ions and chloride ions are equal there.

Therefore, the concentration of sodium ions is 0.131 M.

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By using the ideal gas law and Avogadro's number, we find that there are approximately 6.72 × 10^22 molecules of CO2 in 2.5 L at STP.

To determine the number of molecules of CO2 in 2.5 L at STP (Standard Temperature and Pressure), we can use the ideal gas law and Avogadro's number.

Avogadro's number (N_A) is a fundamental constant representing the number of particles (atoms, molecules, ions) in one mole of substance. Its value is approximately 6.022 × 10^23 particles/mol.

STP conditions are defined as a temperature of 273.15 K (0 °C) and a pressure of 1 atmosphere (1 atm).

First, we need to convert the volume from liters to moles of CO2. To do this, we 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.

Since we have STP conditions, we can substitute the values:

(1 atm) × (2.5 L) = n × (0.0821 L·atm/(mol·K)) × (273.15 K).

Simplifying the equation:

2.5 = n × 22.4149.

Solving for n (the number of moles):

n = 2.5 / 22.4149 ≈ 0.1116 moles.

Next, we can calculate the number of molecules using Avogadro's number:

Number of molecules = n × N_A.

Number of molecules = 0.1116 moles × (6.022 × 10^23 particles/mol).

Number of molecules ≈ 6.72 × 10^22 molecules.

Therefore, there are approximately 6.72 × 10^22 molecules of CO2 in 2.5 L at STP.

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Our cells obtain the molecules they need to function properly from various sources

One important source is our diet. When we eat food, our digestive system breaks it down into smaller molecules that can be absorbed into the bloodstream. These molecules, such as glucose, amino acids, and fatty acids, are then transported to our cells, where they are used as fuel for energy production .

Additionally, our cells can synthesize some molecules on their own. Through processes like photosynthesis in plant cells or biochemical reactions in our body, cells can produce molecules like carbohydrates, lipids, proteins, and nucleic acids.

In summary, cells acquire the molecules they require from the food we eat, as well as through their own synthesis, ensuring they have the necessary resources for proper functioning.

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Answer:

A functioning human body has molecules from food (glucose and amino acids) and molecules from air (oxygen) in its cells.

The name of the salt tells us that:

a) there is just one other element combined with the metal by looking at the suffix of the salt's name.

b) the presence of oxygen in a salt can be indicated by the name of the salt.

a) The name of a salt can tell us that there is just one other element combined with the metal by looking at the suffix of the salt's name. If the salt name ends in "-ide," it indicates that the salt is composed of a metal and a single non-metal element.
For example, sodium chloride (NaCl) and potassium bromide (KBr) are salts where the metal (sodium and potassium) is combined with a single non-metal element (chlorine and bromine, respectively). The "-ide" suffix suggests the presence of only one other element in the salt.

b) The presence of oxygen in a salt can be indicated by the name of the salt. If the salt name includes the element oxygen, it suggests that oxygen is present in the salt compound.
For example, sodium carbonate (Na₂CO₃) and calcium sulfate (CaSO₄) contain the element oxygen in their chemical formulas. The presence of oxygen in the salt is implied by the name and the combination of elements in the compound.

Therefore, the name of salt tells us that there is just one other element combined with the metal and there is oxygen present in the salt

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The formula for calculating the amount of energy or heat released is:

ΔH = C ΔT

where ΔH is heat of combustion, C is heat capacity, while ΔT is change in temperature

ΔH = 8.69 kJ / °C * (5.14°C)

ΔH = 44.67 kJ

Then we calculate the moles of CH3OH which has molar mass of 32.04 g/mol:

moles = 1.922 / 32.04 = 0.05999 mol

SO the molar heat of combustion is:

ΔHm = 44.67 kJ / 0.0599875 mol

ΔHm = 744.60 kJ / mol

The mass of 0.550 mol of methanol, CH3OH, is 17.6 g

To find the mass of 0.550 mol of methanol, CH3OH, we need to use the molar mass of CH3OH. The molar mass is the sum of the atomic masses of each element in the molecule, which can be found on the periodic table.
For CH3OH, we have:

- Carbon (C): 12.01 g/mol
- Hydrogen (H): 1.01 g/mol (there are 4 hydrogen atoms in CH3OH)
- Oxygen (O): 16.00 g/mol

So the molar mass of CH3OH is:

12.01 g/mol + (1.01 g/mol x 4) + 16.00 g/mol = 32.04 g/mol

This means that one mole of CH3OH weighs 32.04 grams.

To find the mass of 0.550 mol of CH3OH, we can use the following formula:

mass = number of moles x molar mass

So the mass of 0.550 mol of CH3OH is:

0.550 mol x 32.04 g/mol = 17.62 g

Rounding this to three significant figures gives us:
17.6 g

Therefore, the mass of 0.550 mol of methanol, CH3OH, is 17.6 g (rounded to three significant figures).

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Answer:

it went under the process known as crystalization

Explanation:

am a chemist

The molarity of a solution is an important method to determine the concentration of a solution. The molar mass of the acid is 180 g / mol.

The molarity of a solution is defined as the number of moles of the solute present per litre of the solution. The equation used to calculate the molarity is:

Molarity = Number of moles / Volume in Litres

0.08843 L × 0.102 mol / 1L = 0.00902 mol base

1 mol base = 1 mol acid

1.625 g / 0.00902 mol = 180 g/mol

Thus the molar mass of the acid is 180 g/mol.

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The relation between V, R, and I can be determined using Ohm's Law and the principles of parallel circuits.

Ohm's Law states that the voltage across a resistor (V) is equal to the current (I) flowing through it multiplied by its resistance (R). This can be expressed as V = I × R

In a parallel circuit, multiple resistors are connected in such a way that the voltage across each resistor is the same. This means that the voltage across all the resistors in parallel will be equal to the total voltage applied to the circuit. Therefore, the voltage (V) in the above equation represents the total voltage applied to the parallel circuit.

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Your question is incomplete, most probably the full question is this:

What is the relation between V, R, and I in a parallel circuit?