As the Civil War began, the South seemed to have an advantage of Group of answer choices greater ability to wage offensive warfare. more talented military leaders. superior industrial capabilities. superior transportation facilities.

The volume of the gas at STP = 35.01 L

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure).

In general, the gas equation can be written  

\(\large {\boxed {\bold {PV = nRT}}}\)

where  

P = pressure, atm  

V = volume, liter  

n = number of moles  

R = gas constant = 0.08206 L.atm / mol K  

T = temperature, Kelvin  

V=17.4 L

T = 23 + 273 = 296 K

P = 2.18 atm

\(\tt mol=n=\dfrac{PV}{RT}\\\\n=\dfrac{2.18\times 17.4}{0.082\times 296}\\\\n=1.563\)

The volume of the gas occupy at STP :

\(\tt 1.563\times 22.4=35.01~L\)

endothermic

requires energy to occure

Answer:2

Explanation:

Answer:

letter B is the answer

Explanation:

just take a look at the atoms

Answer:

B.) Only elements have one kind of atom.

Explanation:

An element consists of only one type of atom, while a compound consists of two or more types of elements

There are approximately 2.52 x 10^22 molecules of phosphorus pentachloride present in 8.70 grams of this compound.

As per the question given,  

To determine the number of molecules of phosphorus pentachloride present in 8.70 grams of this compound, we need to use the following steps:

Determine the molar mass of PCl5, which is the sum of the atomic masses of one mole of P and five moles of Cl:

M(P) = 30.97 g/mol

M(Cl) = 35.45 g/mol

M(PCl5) = 30.97 + 5(35.45) = 208.23 g/mol

Convert the given mass of PCl5 to moles using its molar mass:

moles of PCl5 = 8.70 g / 208.23 g/mol = 0.0418 mol

Convert the number of moles of PCl5 to molecules using Avogadro's number, which is 6.022 x 10^23 molecules/mol:

molecules of PCl5 = 0.0418 mol x 6.022 x 10^23 molecules/mol = 2.52 x 10^22 molecules

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As a result, the dry gas volume at STP is 45.58 cm 3.

Water vapor is present in the gas. Since H2 is created during the reaction and water vapor is irrelevant when determining the equivalent weight, we only need the dry gas. As a result, the volume of H2 gas can be calculated using the ideal gas law.

P 1 = 750 mm Hg, 14 mm Hg, 736 mm Hg V = 50 cm 3 T = 17 0 C = 290 K

P = 760mmHg, V =?cm3, T = 0 0 and C = 273K.

The Gas equation follows.

P 1V 1/ T1 = P 2V 2/ T2

290/73650 = 273/760V 2

= 290760V 2

= 7365027V 2 = 45.58 cm

As a result, the dry gas volume at STP is 45.58 cm 3.

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Explanation:

There is a limit to different things we encounter around the universe due to a lot of reasons.

To overcome these barriers, some catalysts that are not readily available are needed. This reduces the combination of some atoms in nature.

This and many more reasons limits the combination of chemical substances.

There is a limit to different things we encounter around the universe due to a lot of reasons:

So, for a chemical reaction to occur there are certain parameters that need to taken into consideration for a chemical reaction to actually takes place.

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Answer: The mass of barium nitrate required is 23.91 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\)    ......(1)

Given mass of sodium phosphate = 10.0 g

Molar mass of sodium phosphate = 163.94 g/mol

Plugging values in equation 1:

\(\text{Moles of sodium phosphate}=\frac{10.0g}{163.94g/mol}=0.061 mol\)

The chemical equation for the reaction of sodium phosphate and barium nitrate follows:

\(3Ba(NO_3)_2+2Na_3PO_4\rightarrow Ba_3(PO_4)_2+6NaNO_3\)

By the stoichiometry of the reaction:

If 2 moles of sodium phosphate reacts with 3 moles of barium nitrate

So, 0.061 moles of sodium phosphate will react with = \(\frac{3}{2}\times 0.061=0.0915mol\) of barium nitrate

Molar mass of barium nitrate = 261.337 g/mol

Plugging values in equation 1:

\(\text{Mass of barium nitrate}=(0.0915mol\times 261.337g/mol)=23.91g\)

Hence, the mass of barium nitrate required is 23.91 g

The size of micropipette that you would select to deliver 215 microliters would be a micropipette with a volume range of 200-1000 microliters.

What is a micropipette?

A micropipette is a laboratory instrument used to measure and dispense small volumes of liquid, typically in the range of microliters (µL) or nanoliters (nL). They are commonly used in chemistry, biology, and biochemistry experiments, as well as in clinical and industrial settings.

Micropipettes consist of a handle, a digital or manual volume adjustment mechanism, and a tip that is placed into the liquid to be dispensed. They work by creating a vacuum or positive pressure inside the tip, which draws or pushes the liquid out of the tip.

Micropipettes come in different volume ranges and it is important to select the right one to ensure accurate delivery of the desired volume. For example, a micropipette with a volume range of 2-10 microliters would not be suitable for delivering 215 microliters, while a micropipette with a volume range of 200-1000 microliters would be more appropriate.

It's also important to note that, even if the micropipette is able to deliver 215 microliters, you should always check the calibration of the micropipette before use, to make sure that it's delivering the correct volume.

Hence, a micropipette with a volume range of 200-1000 microliters is suitable to deliver 215 microliters.

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Ka = [H+] [X-] ÷ [HX] is the acid dissociation constant for an acid at equilibrium.

Chemical equilibrium is the condition in which no net change in the amounts of reactants and products occurs.

HX(aq) ↔ H+(aq) + X-(aq)

[H+] = [X-]

Ka = [H+] [X-] ÷ [HX]

Hence, Ka = [H+] [X-] ÷ [HX] is the acid dissociation constant for acid at equilibrium.

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Answer:

epithelial tissue, connective tissue, muscle tissue, and nervous tissue.

I think its right

brainiest pls

Explanation:

Answer: c

Explanation:

Answer:

choice D. Ionic, because valence electrons are transferred.

Explanation:

Answer:

solids...............

The ranking from highest to lowest fraction of remaining nuclei after 1 hour is:
Sample D, Sample C, Sample B, Sample A.

To rank the four radioactive samples in order of what fraction of the original nuclei remains after 1 hour, we need to understand the concept of half-life. The half-life of a radioactive substance is the time it takes for half of the original nuclei to decay.

To solve this problem, we need to know the half-life of each sample. Let's assume the half-lives are as follows:
- Sample A: 10 minutes
- Sample B: 30 minutes
- Sample C: 1 hour
- Sample D: 2 hours

Since we are looking for the fraction remaining after 1 hour, we need to determine how many half-lives occur in that time period. As each half-life passes, the amount of remaining nuclei is halved.

Based on the given half-lives, here is the ranking:
1. Sample D: After 1 hour, there would be 0.5 half-lives, leaving 50% of the original nuclei remaining.
2. Sample C: After 1 hour, there would be 1 half-life, leaving 50% of the original nuclei remaining.
3. Sample B: After 1 hour, there would be 2 half-lives, leaving 25% of the original nuclei remaining.
4. Sample A: After 1 hour, there would be 6 half-lives, leaving 1.56% of the original nuclei remaining.

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Answer:

1. Crush the sugar into powder.

2. Heat the water.

3. Dissolve it by stirring continuously

Explanation:

1. Crushing the sugar into powder increases surface area. So it increases the changes of dissolving

2. Heating the water increases the capacity of water to dissolve sugar.

3. Stirring continuously increases randomness of particles so eases mixing up thus increasing dissolving tendency.

The solution of ammonium acetate into 500 mL of water  contains NH₄⁺ and C₂H₃O₂ ions.(D)

When ammonium acetate is added to water, it dissociates into its constituent ions: NH₄⁺ and C₂H₃O₂⁻. These ions are then evenly distributed throughout the solution. The NH₄⁺ ion is a weak acid and can donate a proton (H⁺ ion) to water to create NH₃ and H₃O⁺ ions, which gives the solution a slightly acidic pH.

In summary, when ammonium acetate is added to water, it dissociates into NH₄⁺ and C₂H₃O₂⁻ ions, which are evenly distributed throughout the solution.

To prepare a solution containing soluble silver ions, a chemist can dissolve a soluble silver salt, such as silver nitrate (AgNO₃), in water. When AgNO₃ dissolves in water, it dissociates into Ag⁺ and NO₃⁻ ions, which are evenly distributed throughout the solution.

The resulting solution will contain soluble silver ions, which can be used for a variety of applications, including silver plating, electrochemistry, and analytical chemistry.(D)

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Answer:

the melting point T = 125.36°C

Explanation:

Given that:

The resistance of a platinum thermometer at  0°C is  \(R_o\) = 160.0 ohms

The resistance of a platinum thermometer when immersed in a crucible containing a melting substance \(R_t\) = 243.8 ohms

The temperature coefficient at room temperature  20°C = ∝ = 0.00392

The objective is to determine the melting point of this substance

To do that ; at 20°C, the resistance of the platinum thermometer can be calculated as follows:

\(R_{20} = R_o(1 + \alpha \Delta T)\)

\(R_{20} = 160(1 + (0.00392 \times (20-0)^0C))\)

\(R_{20} = 160(1 + (0.00392 \times (20))\)

\(R_{20} = 160(1 + (0.0784)\)

\(R_{20} = 160(1.0784)\)

\(R_{20} = 172.544 \ ohms\)

The resistance of the platinum thermometer at t°C , \(R_t\) = \(R_{20}(1 + \alpha \Delta T)\)

\(243.8 = 172.544(1 + 0.00392 \times (T-20)^0C}\)

\(\dfrac{243.8}{ 172.544 }= (1 + 0.00392 \times (T-20)^0C}\)

\(1.413 = (1 + 0.00392 \times (T-20)^0C}\)

\(1.413-1 = 0.00392 \times (T-20)^0C}\)

\(0.413 = 0.00392 \times (T-20)^0C}\)

\(\dfrac{0.413 }{0.00392} = (T-20)^0C}\)

105.36°C = (T - 20) °C

T = 105.36°C + 20 °C

T = 125.36°C

Answer:

\(V_2=1.34L\)

Explanation:

Hello there!

In this case, since this problem is describing how pressure changes as a function of volume and vice versa, it is possible recall the Boyle's law as shown below:

\(P_1V_1=P_2V_2\)

Whereas we are asked to compute the volume when the change is pressure is performed (V₂); thus, we proceed as follows:

\(V_2=\frac{P_1V_1}{P_2}\\\\V_2=\frac{1.55L*105.2kPa}{122.0kPa}\\\\V_2=1.34L\)

Best regards!

Answer

Iron powder

Explanation

The one with the highest surface area will react with oxygen the fastest.

This is because if the surface area of a reactant is increased; more particles are exposed to the other reactant, and there is a greater chance of particles colliding, which leads to more successful collisions per second. Hence the rate of reaction increases.

The one with the highest surface area is iron powder.

Answer:

The answer is B: main-group elements.

Explanation:

Answer:

b

Explanation:

Answer:

conduction

Explanation:

as conduction happens when particles in an object bump into each other and pass on the heat energy till the heat has travelled throughout the object

(metal is also a good heat conductor)

A triple bond may consist of one sigma bond and two pi bonds.

Sigma bonds are the most powerful kind of covalent chemical bond. they're fashioned by way of head-on overlapping among atomic orbitals. Sigma bonding is most surely described for diatomic molecules the usage of the language and equipment of symmetry businesses

Sigma bond is a covalent bond formed by overlap of atomic orbitals and hybrid orbitals along the bond axis. The sigma bond in the a hydrogen molecule is formed by overlap of a pair of 1s orbitals, one from each hydrogen atom.

The pi bond is the same as that of the p orbital when seen down the bond axis.

A pi bond is a weaker chemical covalent bond than a sigma bond.

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Answer:

See below

Explanation:

This is a simple reaction.

Calcium and chlorine molecule are combined to get calcium chloride.

Ca + Cl₂ → CaCl₂

\(\rule[225]{225}{2}\)

Hope this helped!

Answer:

It is A

Explanation:

here you go

Ensure that it answers a question about cause and effect. Hence, option A is correct.

Experimental design is a concept used to organize, conduct, and interpret results of experiments in an efficient way, making sure that as much useful information as possible is obtained by performing a small number of trials.

Thus, when developing an experimental design, the action that would improve the quality of the results is to ensure that it answers a question about cause and effect.

Hence, option A is correct.

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Answer:

A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.

I hope this helps you understand! <3

Answer:

Chemical Nomenclature?

Explanation: