calculate the volume (in mL) of 0.100 M CaCl2 needed to produce 1.00 g of CaCO3 (s). There is an excess of Na2CO3. Volume of calcium chloride in mL

From the specific heat capacity of mercury, the amount of heat energy required to raise the temperature of 4.0 g of mercury metal from 9.3 °C to 83.0 °C is 77.792 J.

The specific heat capacity of a substance is the amount of heat required to raise the temperature of a unit mass of the substance by one degree Celsius or kelvin.

The specific heat capacity of a substance is a constant that can be used to calculate the amount of heat required to raise the temperature of a given mass of a substance to any temperature.

The specific heat capacity of mercury is 0.140 J/g/k.

The formula for calculating specific heat capacity is given below:

Specific heat capacity, c = Δq/mΔT

where;

Δq = heat change

m = mass of the substance

ΔT = temperature change

The Heat required, Δq, will then be:

Δq = m * c * ΔT

Heat required, Δq = 4.0 * 0.140 * (83.0 - 9.3)

Heat required, Δq = 77.792 J

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3.6 atm is the pressure inside the container after 243 mg of magnesium has reacted.

Pressure is defined as the force applied perpendicularly to an object's surface divided by the area over which that force is applied.

The reaction given is: Mg(s) + 2HCl(aq) → MgCl2(s) + H2(g). The moles of H2 gas formed are therefore equal to the moles of Mg that reacted, and can be calculated from: n = 0.243 g/(24.3 g/mol) = 0.01 moles (converting 243 mg to 0.243 g).

The added pressure is calculated by P = nRT/V using approximations: 0.08 L atm/molK for R (0.0821 rounded), 300K for T (303.15 before rounding) and 0.10 L for V.

Solving gives pressure = 2.4 atm. Finally, this number must be added to the initial pressure: 2.4 + 1.2 = 3.6 atm.

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Answer:

\(m=1.325gNa_2CO_3\)

Explanation:

Hello,

In this case, by considering the given seminormal solution, we infer it is a 0.5-N solution which means that we can obtain the equivalent grams as shown below for the 55 cc (0.055 L) volume:

\(eq-g=0.5eq-g/L*0.050L=0.025eq-g\)

Next, since sodium carbonate has two sodium ions with a +1 oxidation state each, we can obtain the moles:

\(mol=0.025eq-gNa_2CO_3*\frac{1molNa_2CO_3}{2eq-gNa_2CO_3}\\ \\mol=0.0125molNa_2CO_3\)

Finally, the mass is computed by using its molar mass (106 g/mol)

\(m=0.0125molNa_2CO_3*\frac{106gNa_2CO_3}{1molNa_2CO_3} \\\\m=1.325gNa_2CO_3\)

Regards.

Answer:

0.44 M

Explanation:

Answer:

The better solvent for separating the mixture of A and B is dichloromethane

Explanation:

Petroleum ether is the mixture of hydrocarbons obtained from the petroleum distillation with a boiling range between 35 and 60°C. Is used as a solvent.

In the other hand, the best solvent for separating a mixture in TLC is the one that has the higher difference between RF's of the compounds.

The difference in RF's in dichloromethane is:

|0.44 - 0.69| = 0.25

In petroleum ether:

|0.29 - 0.45| = 0.16

That means the better solvent for separating the mixture of A and B is dichloromethane

Answer:

Chemical properties, such as combustibility, are generally observed as the identity of a substance changes and one or more new substances form.

Explanation:

Chemical properties, such as combustibility, are generally observed as the identity of a substance changes and one or more new substances form. Hence, option C is correct.

Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter.

Substances made of wood, such as paper and cardboard, are also flammable.

Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter.

They include reactivity, flammability, and the ability to rust.

Hence, option C is correct.

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In order to find the concentration of each pH value, we need to use the inverse formula of pH, but now to find the concentration of H3O+, the formula is:

[H3O+] = 10^-pH

For pH 1 we have:

[H3O+] = 10^-6.0

[H3O+] = 1*10^-6

ACIDIC

pH 2:

[H3O+] = 10^-5.5

[H3O+] = 3.16*10^-6

ACIDIC

pH 3:

[H3O+] = 10^-3.2

[H3O+] = 6.31*10^-4

ACIDIC

pH 4:

[H3O+] = 10^-7.2

[H3O+] = 6.31*10^-8

BASIC

Answer:

To determine the identity of metal X, we need to compare the standard reduction potentials of the possible metals with the standard reduction potential of the Mg half-reaction.

From Table 18.1, we can find the standard reduction potentials for each of the metals listed:

Pb: -0.13 V

Zn: -0.76 V

Ni: -0.25 V

Fe: -0.44 V

Mn: -1.18 V

The reduction half-reaction for the Mg electrode is:

Mg2+ + 2e- → Mg E° = -2.37 V

The overall reaction for the galvanic cell is:

Mg(s) + X2+(aq) → Mg2+(aq) + X(s)

The standard cell potential is given by:

E°cell = E°(cathode) - E°(anode)

where the cathode is the reduction half-reaction and the anode is the oxidation half-reaction.

Substituting the given values, we get:

1.61 V = E°(X2+/X) - (-2.37 V)

Simplifying, we get:

E°(X2+/X) = 1.61 V + 2.37 V = 3.98 V

Comparing E°(X2+/X) with the standard reduction potentials in Table 18.1, we see that only zinc (Zn) has a reduction potential that is more negative than 3.98 V. Therefore, the metal X is zinc (Zn).

Therefore, the answer is (b) Zn.

Answer: The nuclear equation is \(^{180}_{173}Tl \rightarrow ^{180}_{173}Tl + ^{0}_{0}\gamma\).

Explanation:

A nuclear reaction in which a heavy particle splits into another particle along with release of energy is called a nuclear fission reaction.

For example, \(^{180}_{173}Tl \rightarrow ^{180}_{173}Tl + ^{0}_{0}\gamma\)

Here, energy is radiated in the form of gamma radiation.

Thus, we can conclude that the nuclear equation is \(^{180}_{173}Tl \rightarrow ^{180}_{173}Tl + ^{0}_{0}\gamma\).

Answer:

Cellular respiration is used to create usable energy from the foods that living things eat. It's important to know that the reactions involved in cellular respiration are catabolic, meaning they break down molecules into smaller ones. This differs from anabolic reactions, which build bigger molecules from smaller ones

Answer:

see below

Explanation:

1. combustion

2.  The breakdown of hydrogen bromide is endothermic, and the formation of hydrogen iodide is exothermic.

3. the water

4. H–H

5. It is endothermic because more energy is needed to break up the reactants versus the amount given off by the products.

6. NO

7. H–F

8.  sunlight warming a concrete sidewalk

9.  The total energy of the system will stay the same as kinetic energy from the warm water increases the kinetic energy of molecules in the ice

10. This is an exothermic reaction because the reactants have more energy than the products.

11. the energy that must be added to a system to break the bonds of the reactants

12. The activation energy required for manganese dioxide to form intermediate molecules with H2O2 is less than the activation energy required for H2O2 to decompose on its own.

13. written response

14.  written response

15. written response

16. written response

[quizlet: captncrun}

Among the bonds in the chart, H-F, with a bond energy of 565 kJ/mol, is the most stable.

Bond energy is defined as the amount of energy required to break apart a mole of molecules into its component atoms.

It is a measure of the strength of a chemical bond.

We have the following bonds with their bond energies (kJ/mol).

The higher the bond energy, the stronger and the more stable the bond. Thus, H-F, with a bond energy of 565 kJ/mol, is the most stable.

Among the bonds in the chart, H-F, with a bond energy of 565 kJ/mol, is the most stable.

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With a balanced reaction, we can determine the moles of products. The balanced equation will be:

FeCl3 + 3NH4OH → Fe(OH)3 + 3NH4Cl

They says that NH4OH is in excess, so, the limiting reactant will be FeCl3 and we will do all the calculations with this reactant.

We have to calculate the moles of FeCl3, we will use the molar mass:

Now, to calculate the moles of the products we must take into account the product/reactive ratios, for this we are guided by the coefficients that accompany the molecules.

Ratio Fe(OH)3 to FeCl3 = 1/1

Ratio NH4Cl to FeCl3 = 3/1

Moles of each product

Moles of Fe(OH)3

Moles of NH4Cl

The grams of each product we will find by multiplying the moles by the molar mass. So we have.

g of Fe(OH)3

g of NH4Cl

The total grams of propyl butanoate can be produced is 175.94 grams, under the condition that if 73.40g of propanol and 72.09g of butanoic acid are allowed to react.

Here the  reaction between propanol and butanoic acid produces propyl butanoate and water. Then the evaluated balanced chemical equation for this reaction is

C₃H₇OH + C₄H₈O₂ →C₇H₁₄O₂ + H₂O

To evaluate the mass of propyl butanoate produced, we need to first determine the limiting reactant. The limiting reactant is the reactant that is fully consumed in the reaction plus has limits to the amount of product that can be formed.
Now to find the limiting reactant, we need to evaluate the moles of each reactant present to their stoichiometric coefficients in the balanced chemical equation.

The molar mass of propanol is 60.10 g/mol and the mass given is 73.40 g. Therefore, the number of moles of propanol is

73.40 g / 60.10 g/mol
= 1.22 mol

The molar mass of butanoic acid is 88.11 g/mol and the mass given is 72.09 g. Then, the number of moles of butanoic acid is:

72.09 g / 88.11 g/mol
= 0.818 mol

Applying the balanced chemical equation, we can find that the stoichiometric ratio between propanol and propyl butanoate is 1:1.
Hence, the number of moles of propyl butanoate produced is also 1.22 mol.

The molar mass of propyl butanoate is 144.20 g/mol. Finally, the mass of propyl butanoate produced is:

1.22 mol × 144.20 g/mol
= 175.94 g

Therefore, 175.94 grams of propyl butanoate can be produced.
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Answer:

Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO

Explanation:

The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.

The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.

The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.

The methyl groups are non-polar and do not have any significant reactivity.

The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.

The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.

Answer:

450 grams of Na2SO4

Explanation:

hope that helps

Answer:

The element is Iron

Explanation:

Scientists believe water currents within the earth's mantle are slowly causing the plates above to move

Answer: True

EXplanation:

The common, simplified explanation for why tectonic plates are moving is that they're carried along on currents in the upper mantle, the slowly flowing layer of rock just below the Earth's crust. Converging currents drive plates into each other. Diverging currents pull them apart

Answer:

C. 2.70 g/mL

Explanation:

Density is the ratio between the mass of a substance and the volume it occupies. Based on Archimedes' volume, the displaced volume of the aluminium is the volume it occupies. To solve this question we must find the difference in volume between initial volume of water = 30mL and final volume of water + aluminium = 39.26mL. This difference is the volume of the aluminium. With its mass we can find density:

39.26mL - 30mL = 9.26mL

Density = 25.00g / 9.26mL =

2.70g/mL

Right answer is:

The mass in grams of 4.60 x 10^23 atoms is approximately 9.17 g.

To find the mass in grams of 4.60 x 10^23 atoms, we need to consider the molar mass and Avogadro's number. Avogadro's number (6.022 x 10^23) represents the number of atoms or molecules in one mole of a substance.

First, we need to determine the molar mass of the substance in question. Let's assume we are dealing with a specific element, such as carbon (C), which has a molar mass of approximately 12.01 g/mol.

To calculate the mass in grams, we can use the following formula:

Mass (in grams) = (Number of atoms / Avogadro's number) x Molar mass

Substituting the given values:

Mass (in grams) = (4.60 x 10^23 atoms / 6.022 x 10^23) x 12.01 g/mol

Calculating the expression:

Mass (in grams) = (0.763 mol) x 12.01 g/mol

Mass (in grams) = 9.17 g

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Answer:

To convert a mile per hour measurement to a meter per second measurement, multiply the speed by the conversion ratio. The speed in meters per second is equal to the miles per hour multiplied by 0.44704.

Explanation:

The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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There are approximately \(2.76 * 10^{24\) ammonia molecules in the given sample.

To calculate the number of ammonia molecules in the sample, we need to use Avogadro's number and the molar mass of ammonia.

The molar mass of ammonia \((NH_3)\) can be calculated by adding up the atomic masses of nitrogen (N) and hydrogen (H):

Molar mass of \(NH_3\) = (1 x atomic mass of N) + (3 x atomic mass of H)

              = (1 x 14.01 g/mol) + (3 x 1.01 g/mol)

              = 14.01 g/mol + 3.03 g/mol

              = 17.04 g/mol

Now, we can calculate the number of moles of ammonia in the sample using the formula:

Number of moles = Mass of the sample / Molar mass

Number of moles = 78.25 g / 17.04 g/mol

              ≈ 4.5865 mol (rounded to four decimal places)

Finally, we can use Avogadro's number, which represents the number of particles (atoms, molecules, etc.) in one mole of a substance. Avogadro's number is approximately \(6.022 * 10^{23\) particles/mol.

Number of ammonia molecules = Number of moles x Avogadro's number

Number of ammonia molecules ≈ 4.5865 mol x (\(6.022 * 10^{23\) molecules/mol)

                           ≈ \(2.76 * 10^{24\) molecules (rounded to two significant figures)

Therefore, the provided sample contains roughly \(2.76 * 10^{24\) ammonia molecules.

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The number of ammonia molecules in the sample is approximately 2.764 x \(10^{24}\) molecules.

To calculate the number of ammonia molecules in a given sample, we need to use Avogadro's number and the molar mass of ammonia.

The molar mass of ammonia (NH3) is calculated as follows:

Molar mass of N = 14.01 g/mol

Molar mass of H = 1.01 g/mol

Total molar mass of NH3 = 14.01 g/mol + (3 * 1.01 g/mol) = 17.03 g/mol

Now, we can calculate the number of moles of ammonia in the sample:

Number of moles = Mass of sample / Molar mass of NH3

Number of moles = 78.25 g / 17.03 g/mol = 4.594 moles

Next, we use Avogadro's number, which states that there are 6.022 x \(10^{23}\) molecules in one mole of a substance.

Number of molecules = Number of moles * Avogadro's number

Number of molecules = 4.594 moles * 6.022 x \(10^{23}\) molecules/mol = 2.764 x \(10^{24}\) molecules

Therefore, there are approximately 2.764 x \(10^{24}\) ammonia molecules in the given sample of 78.25 g.

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Explanation:

Hey there!!

The answer is Electrons.

Electrons are the small part of an atom that revolves around the nucleus of an atom.

Hope it helps..

emf generated by the cell is 0.40 V.

Oxidation: \(2Al + 6e^{-}\)→\(2Al^{3+}\)

Reduction: \(3I_{2} + 6e^{-}\)→\(6I^{-}\)

Overall: \(2Al + 3I_{2}\)→\(2Al^{3+} + 6I^{-}\)

Nernst equation for this cell reaction at 25-degree celsius:

\(E_{cell} = E^{0}_{cell} - \frac{0.059}{n} log[Al^{3+}]^{2} [I^{-}]^{6}\)

where n is the number of electrons exchanged during cell reaction,  \(E^{0}_{cell}\) is standard cell emf,  \(E_{cell}\) is cell emf,  \([Al^{3+}]\) is the concentration of \(Al^{3+}\)  , and \([I^{-}]\) is the concentration of \(I^{-}\).

Plug in all the given values in the above equation -

\(E_{cell} = 2.20 - \frac{0.059}{6} [(4.0 * 10^{-3})^{2}*(0.15)^{6}]\)

=0.40 V

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Answer:

2.58g

Explanation:

First calculate the moles of butane used in the reaction

moles = mass÷molar mass

= 0.85÷58

= 0.0147

According to the stoichiometric ratio:

C4H10 : CO2 = 2:8

moles of CO2 =(8÷2)×0.0147

=0.0586 moles

mass of CO2 = 0.0586×44

= 2.58g

2.58g is the mass of carbon dioxide produced when 0.85 grams of butane (\(C_4H_{10}\)) reacts with oxygen according to the following balanced chemical equation:  \(2C_4H_{10} + 13O_2 - > 8CO_2 (g) + 10H_2O (g)\)

The mole is the amount of substance of a system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12; its symbol is “mol”.

Firstly calculate the moles of butane used in the reaction

moles = \(\frac{mass}{molar \;mass}\)

= \(\frac{0.85}{58}\)

= 0.0147

According to the stoichiometric ratio:

\(C_4H_{10}\) : \(CO_2\) = 2:8

moles of \(CO_2\) = (\(\frac{8}{2}\)) × 0.0147

=0.0586 moles

mass of \(CO_2\) = 0.0586×44

= 2.58g

Hence, option A is correct.

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Answer: I believe it should be 224g.

Explanation: There are 40g for every one mole of NaOH, so multiply the two to get to 224. I hope that helps!

Mass of NaOH = 223.983 g

A mole is a unit of many particles (atoms, molecules, ions) where 1 mole is the number of particles contained in a substance that is the same amount as many atoms in 12 gr C-12  

1 mole = 6.02.10²³ particles  

While the number of moles can also be obtained by dividing the mass (in grams) by the molar mass of an element or molecule  

\(\tt \boxed{\bold{n=\dfrac{mass}{MW}}}\)

MW of NaOH = 39.997 g/mol

moles of NaOH= 5.6

Mass of NaOH :

\(\tt mass=mol\times MW\\\\mass=5.6~moles\times 39,997 g/mol\\\\mass=223.983~g\)

Answer:

witch one witch species witch bone of 1 and 2

Answer:

Yes, process 1 has an advantage over process 2 for the planarian worm. Process 1 requires only one parent. If the planarian can’t find a mate, the life cycle will continue because it can still reproduce.

Explanation:

i did it

Substance A has a higher boiling point compared to Substance B when measured on the same temperature scale.

To compare the boiling points of Substance A and Substance B, which were measured using different temperature scales, we need to convert the temperatures to a single scale for accurate comparison. The boiling point of Substance A was reported as 245 K, and the boiling point of Substance B was reported as -92°C. To convert Substance B's temperature from Celsius to Kelvin, we need to add 273.15 to the Celsius value. Thus, -92°C + 273.15 = 181.15 K. Now, both temperatures are in Kelvin: Substance A boils at 245 K, and Substance B boils at 181.15 K. Comparing the temperatures, we find that Substance A boils at a higher temperature (245 K) than Substance B (181.15 K). Therefore, Substance A has a higher boiling point compared to Substance B when measured on the same temperature scale.

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