25.34/5.98 = ?, what is the answer reported to the correct number of significant figures?

Answer:

9 moles of the reactant form 8 moles of the product

Explanation:

The number in front of an alement or compound in a chemical equation is the number of moles. If there isn't a number...just know that the number of moles is 1

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Answer: B. The storm was deep and turbulent

Explanation: I just took the test

The fact that the snowflakes were heavily rimed shows that the storm was deep and turbulent.

A turbulent storm is composed of chaotic air movements. A turbulent storm may lead to a lot of damage in its path owing to the force of the advancing storm.

For a deep and turbulent storm, the image taken by the high resolution camera of the environmentalist will show the snowflakes were heavily rimed.

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Answer:0.00496

Explanation:

1.22 litres will be the volume at a pressure of 1900 mm Hg if a gas occupies 3.06 liters at 760 mm Hg.

Explanation:

Data given:

Initial volume of the gas V1 = 3.06 Litres

Initial pressure of the gas P1 = 760 mm Hg

final pressure of the gas  P2 = 1900 m Hg

final volume of the gas V2 =?

From the data we can see that Boyle's Law will be applied here,

P1V1 = P2V2

Rearranging the equation, we get

V2 = [tex]\frac{P1V1}{P2}[/tex]

putting the values in the equation, we get

V2 = [tex]\frac{3.06 X 760}{1900}[/tex]

V2 = 1.224 Litres

The volume is 1.22 litres when the pressure is increased to 1900 mmHg.

Answer:

Explanation: So 1 Kelvin is equal to -272.15 Celsius. Now we need to do some math,

563,180 x -272.15 = -153,269,437 Celsius

I hope this helps :)

AgNO3 ( aq ) + NaI ( aq ) = NaNO3 ( aq ) + AgI ( s ) .

The net ionic equation for the reaction between sodium sulfate and silver nitrate is 2Ag+(aq) + SO42-(aq) → Ag2SO4(s), showing the formation of silver sulfate precipitate.

The reaction between sodium sulfate and silver nitrate results in the formation of a white precipitate of silver sulfate and aqueous sodium nitrate. To write the net ionic equation, we need to focus on the ions directly involved in the formation of the precipitate. The overall chemical equation for this reaction is:

Na2SO4(aq) + 2AgNO3(aq) → Ag2SO4(s) + 2NaNO3(aq)

The complete ionic equation shows all the soluble ions separated

2Na+(aq) + SO42-(aq) + 2Ag+(aq) + 2NO3-(aq) → Ag2SO4(s) + 2Na+(aq) + 2NO3-(aq)

The net ionic equation, which omits the spectator ions (ions that do not take part in the actual precipitate formation), is:

2Ag+(aq) + SO42-(aq) → Ag2SO4(s)

Answer:

The answer to your question is Ferns

Explanation:

Ferns are called nonflowering plants and produce spores instead of seeds.

Answer:

True

Explanation:

I learned in my psychology class that during this stage of life children are egocentric. They haven't learned how to "put themselves in somebody else's shoes". They basically cannot understand things from another point of view. This is completely normal.

Answer:

its B on Ap ex

Explanation:

Just got it wrong -_- it's B

The electrons involved in the bond are shared equally between the

atoms. Hence, option B is correct.

A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms.

A covalent bond in chemistry is a chemical link between two atoms or ions in which the electron pairs are shared between them.

A covalent bond may also be termed a molecular bond.

Covalent bonds form between two nonmetal atoms with identical or relatively close electronegativity values.

Hence, option B is correct.

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Answer:

9.36g of CaF2 is presnt in the solution.

Explanation:

CaF2 molar concentration is 0.15mol in 1.25l of solution.

1. Convert this to the standard concentration in mol/dm3:

1dm3 = 1 L

0.15mol = 1.25 dm3

x =1 dm3

0.15 = 1.25 x

x = 0.15/1.25

x = 0.12 mol/dm3

2. Calculate the relative molecular mass of CaF2

Ca= 40, F =19

RMM = 40 + 19 *2

RMM = 40+ 38

RMM = 78g/mol

3. Calculate the concentration in g/dm3

conc. in mol/dm3 = conc in g/dm3 / RMM

conc in g/dm3 = conc in mol/dm3 * RMM

= 0.12mol/dm3 * 78g/mol

= 9.36 g/dm3

So therefore, 9.36g of CaF2 is presnt in the solution.

Answer : The volume of gas occupy at a pressure of 18 psi is, 520.8 mL

Explanation :

Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.

[tex]P\propto \frac{1}{V}[/tex]

or,

[tex]P_1V_1=P_2V_2[/tex]

where,

[tex]P_1[/tex] = initial pressure = 12.5 psi

[tex]P_2[/tex] = final pressure = 18 psi

[tex]V_1[/tex] = initial volume = 750 mL

[tex]V_2[/tex] = final volume = ?

Now put all the given values in the above equation, we get:

[tex]12.5psi\times 750mL=18psi\times V_2[/tex]

[tex]V_2=520.8mL[/tex]

Thus, the volume of gas occupy at a pressure of 18 psi is, 520.8 mL

Answer:

[tex]c=2.0769\ \frac{J}{g\ \textdegree C}[/tex]

Explanation:

-Specific heat capacity is given by the formula:

[tex]q=mc\bigtriangleup T[/tex]

Where:

[tex]q[/tex] is the heat gained or loosed by the substance

[tex]m[/tex] is the mass of the substance

[tex]c[/tex] is the specific heat of the substance

[tex]\bigtriangleup T[/tex] is the change in temperature

#We make c the subject of the formula and substitute to solve for it:

[tex]q=mc\bigtriangleup T\\\\c=\frac{q}{m\bigtriangleup T}\\\\\bigtriangleup T=(57-32)\textdegree C=25\textdegree C\\\\\therefore c=\frac{6.75\times 10^4J}{1.3\times 1000\ g\times 25\textdegree C}\\\\=2.0769 \ \frac{J}{g\ \textdegree C}[/tex]

Hence, the specific heat capacity of the ice is [tex]2.0769 \frac{J}{g\ \textdegree C}[/tex]

Polylactic acid is a biopolymer.

Biopolymers are defined as those polymers which are produced by the living organisms. Some examples of biopolymers include lignin, suberin, melanin etc. Polystyrene is a synthetic polymer that is formed from styrene monomers which are obtained from petroleum. Polyethylene, which is also known as polythene, is a synthetic polymer and also the most widely used plastic across the globe.

Polylactic acid is a biopolymer which is biodegradable and hydrolysable. It is produced through the condensation of lactic acid. Polyvinylchloride or PVC is the third most widely produced plastic polymer in the world.

Therefore, Polylactic acid is a biopolymer.

Hence, option C is the correct answer.

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Answer:

answers are included below. i did the assignment. I hope this helps!

Explanation:

you should at least have these included in your response.

Which examples did your answer include?

Examples of common acids include vinegar, lemon juice, and soda.

Examples of common bases include ammonia, bleach, and antacids.

Common uses of acids include flavoring and preserving foods, and they are found in cleaning products.

Common uses of bases include neutralizing acids, and they are found in cleaning products.

Answer:

B. An acid-base reaction that leaves no excess H" or OH

Explanation:

a chemical process in which an acid and a base combine to produce salt and water as residues. H+ ions and OH- ions combine to generate water during a neutralisation process

Final answer:

A neutralization reaction is an acid-base reaction in which an acid reacts with a base to produce salt and water, and there is no excess H+ or OH- left in the solution. So the correct option is B.

Explanation:

A neutralization reaction is a specific type of acid-base reaction where an acid reacts with a base to produce salt and water. For instance, when hydrochloric acid (HCl) is mixed with sodium hydroxide (NaOH), the resulting products are sodium chloride (NaCl), which is a salt, and water (H2O). This reaction can be represented by the chemical equation:
HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)

After removing the spectator ions, the net ionic equation for a neutralization reaction is:
H+ (aq) + OH−(aq) → H2O(l)

This shows that the essence of a neutralization reaction is the combination of hydronium ions (H+) from the acid with hydroxide ions (OH−) from the base to form water. Therefore, the correct answer to the student's question is:

B. An acid-base reaction that leaves no excess H+ or OH−

Answer:

c, d

Explanation:

The only ones that can work are:

-dissociate in water (answer choice c)

-are electrolytes (answer choice d)

why?

Acids can dissolve in water and are electrolytes because they form an aqueous solution and have a high conductivity

_____

I did this problem for Edg

The properties of salt are as follows:

A neutralization reaction is when an acid and a base react to form water and salt and involves the combination of [tex]H^+[/tex] ions and [tex]OH^-[/tex] ions to generate water.

Salt dissociates in water - When salts are dissolved in water they form ions namely, cations and anions.

Salts are electrolytes - Electrolyte means a solute that allows a water solution to conduct electricity. Electrolytes produce ions when they dissolve in solution.

Once the salt forms ions when dissociated in the water it conducts electricity. Hence, salts are good electrolytes.

Salts are a product of a neutralizing reaction. - When an acid and base react the products obtained are salt and water. This reaction is called a neutralization reaction. Therefore, Salts are the products of neutralizing reactions.

Hence, options B, C, and E are correct.

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Answer: 58

Explanation:

Answer:

58

Explanation:

Answer:5

Explanation:

Answer:

the answer is 5

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Explanation:

Answer:

Both helium and carbon dioxide will have the same number of molecules

Explanation:

Step 1:

Data obtained from the question.

Mass of He = 4g

Mass of CO2 = 44g

Step 2:

Determination of the number of mole of He and CO2. This is illustrated below:

For He:

Molar Mass of He = 4g/mol

Mass of He = 4g

Number of mole = Mass/Molar Mass

Number of mole of He = 4/4

Number of mole of He = 1 mole

For CO2 :

Molar Mass of CO2 = 12 + (2x16) = 12 + 32 = 44g/mol

Mass of CO2 = 44g

Number of mole = Mass/Molar Mass

Number of mole of CO2 = 44/44

Number of mole of CO2 = 1 mole

Step 3:

Determination of the number of molecules.

From Avogadro's hypothesis, 1mole of any substance contains 6.02x10^23 molecules.

This means that 1 mole of He will contain 6.02x10^23 molecules and 1 mole of CO2 will also contain 6.02x10^23 molecules.

Therefore, both 4g of He and 44g of CO2 contains the same number of molecules i.e 6.02x10^23 molecules

Answer:both helium and carbon dioxide will have the same number of molecules

Explanation:

Answer: both instinct and learning play important roles in shaping waterfowl behavior. ... For example, sucking is an instinctive behavior for a newborn baby and ... On the other hand, some behaviors are learned, such as typing on a computer keyboard. ... themselves courted by the males when they become adults

Explanation:

Answer:

The correct answer is 150 kJ.

Explanation:

As per Law of Conservation of Energy, energy can neither be created nor destroyed, it can only change from one form to another.

If a chemical reaction absorbs 150 kJ and all the energy that is being absorbed is neither created nor destroyed, then it means all the energy absorbed comes from the surroundings (Air, wall of container etc).

When in water power of types of____energy

A.Renewable

Answer When in water power of types of _______ Energy

Explanation:

Is A i think

Hope this Helps!

Answer:

6 oxygen atoms

Explanation:

From the equation,

2Fe(OH)₃ → Fe₂O₃ + 3H₂O

From the reactant (left hand side) we have 2 moles of Fe(OH)₃ having (2 * 3 = 6) atoms of oxygen and decomposed to give Fe₂O₃ which contains 3 atoms of oxygen and 3 moles of water that also contains 3 atoms of oxygen.

Since the number of oxygen participating in the reaction is independent on the product (not a reversible reaction) then the total number of oxygen atoms participating in the reaction is 6

Final answer:

In the reaction 2Fe(OH)3 — Fe2O3 + 3H2O, there are a total of 6 oxygen atoms involved, with 6 on both the reactants' side and the products' side, indicating that the equation is balanced.

Explanation:

The chemical reaction in question is: 2Fe(OH)3 — Fe2O3 + 3H2O. To determine the number of oxygen atoms involved in this reaction, we can inspect the chemical formulae of the reactants and products.

On the left side of the equation, we have 2 moles of Fe(OH)3. Each molecule of Fe(OH)3 contains 3 oxygen atoms, thus in 2 molecules there are 2 × 3 = 6 oxygen atoms.

On the right side, we have 1 mole of Fe2O3 and 3 moles of H2O. Fe2O3 contains 3 oxygen atoms and each H2O molecule contains 1 oxygen atom. Therefore, on the right side, we have 3 + 3 × 1 = 6 oxygen atoms.

The reaction is balanced with an equal number of oxygen atoms on both sides of the equation, confirming that 6 oxygen atoms are involved in the chemical reaction.

That would be D Stoichiometry.

Answer:

d

Explanation:

Answer : The pressure of carbon dioxide in the reaction vessel after the reaction is, 0.59 atm.

Explanation : Given,

Mass of [tex]CO_2[/tex] = 12 g

Molar mass of [tex]CO_2[/tex] = 44 g/mol

First we have to calculate the moles of carbon dioxide gas.

[tex]\text{Moles of }CO_2=\frac{\text{Given mass of }CO_2}{\text{Molar mass of }CO_2}[/tex]

[tex]\text{Moles of }CO_2=\frac{12g}{44g/mol}=0.273mol[/tex]

Now we have to calculate the pressure of carbon dioxide gas.

Using ideal gas equation:

[tex]PV=nRT[/tex]

where,

P = pressure of gas = ?

V = volume of gas = 10.0 L

n = number moles of gas = 0.273 mol

R = gas constant = 0.0821 L.atm/mol.K

T = temperature of gas = [tex]-8.0^oC=273+(-8.0)=265K[/tex]

Now put all the given values in the above formula, we get:

[tex]P\times (10.0L)=(0.273mol)\times (0.0821L.atm/mol.K)\times (265K)[/tex]

[tex]P=0.59atm[/tex]

Therefore, the pressure of carbon dioxide in the reaction vessel after the reaction is, 0.59 atm.

Answer:

Insulation creates a barrier to heat gain and loss in ceilings, roofs, floors, and walls. It is a cost-effective and practical way to keep your house warmer in winter and cooler in summer. It may also reduce condensation, decreasing your chances of damp and mold.

Explanation:

Wall insulation helps keep a house warm by reducing heat conduction, with materials having a high R value that resist heat transfer. Double-paned windows use air's low conductivity to prevent heat loss, and materials like mineral wool and polystyrene trap air to keep energy inside the building, making insulation effective for maintaining home temperatures.

Insulation in walls helps keep a house warm on a cold day by reducing the conduction of heat from inside to outside. Materials like fiberglass, cellulose, and foam have a high R value, which determines their effectiveness at suppressing heat transfer. The higher the R value, the greater the material's resistance to heat transfer. During cold weather, insulation limits heat from escaping the home, and double-paned windows prevent convection through the air gap, taking advantage of air's low conductivity for better insulation.

Insulation materials like mineral wool and polystyrene are effective because they trap air within their structure, which minimizes heat loss since air is a poor conductor and a good insulator. These insulation methods are essential for energy-efficient homes, as they require less energy for heating, making them cost-effective and environmentally friendly. Properly insulating your home not only keeps it warm in winter but also cool in summer, showing the versatility of insulation.

The potential energy of a 50 kg block sitting on a 20 m high platform is calculated using the formula PE = mgh, resulting in 9800 joules.

Calculating Potential Energy

To determine the potential energy (PE) of a block sitting on a platform 20 m high with a weight of 50 kg, the formula PE = mgh can be used, where m is the mass, g is the acceleration due to gravity, and h is the height. The mass of the block is 50 kg, g (gravity) is constant at 9.8 m/s² on Earth's surface, and the height h from which the block could potentially fall is 20 m. Therefore, the calculation is as follows:

PE = (50 kg)(9.8 m/s²)(20 m)

PE = 9800 kg m²/s² = 9800 J (joules)

The gravitational potential energy of the block is 9800 joules (J). This means that if the block were to fall, this is the amount of energy that could potentially be transformed into kinetic energy during the descent.

Answer:

99.943071 g/mol

Explanation:

22.98977*3+30.973761

The molar mass of Na₃P is calculated by summing the atomic masses of three sodium atoms and one phosphorus atom, resulting in a total molar mass of 99.94 g/mol.

To find the molar mass, we sum up the atomic masses of all atoms in the compound. Sodium (Na) has an atomic mass of approximately 22.99 u (units), and Phosphorus (P) has an atomic mass of approximately 30.97 u. As the compound consists of three sodium atoms and one phosphorus atom, its molar mass can be calculated as follows:

Therefore, the total molar mass of Na₃P is:

68.97 u (for Na) + 30.97 u (for P) = 99.94 u

Hence, the molar mass of Na₃P is 99.94 g/mol.