When 6.7 g of salt are dissolved in 52.1 mL of water, 6888.5 J of heat are given off by the system. How much heat would be given off if only 1.00 g of salt had been dissolved in the water?

Answer:

31.95 g

Explanation:

find the molar mass of Al(NO3)3

(Al = 27, N = 14, O = 16)

molar mass of Al(NO3)3 = 27+ (14+16×3)×3

= 213 gmol^-

mass = 213 ×0.15

= 31.95g

According to the claim, Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303. (orange is 1.303 times more effused than blue).Relative rate of effusion for the orange to blue spheres = 1.531.

The process of effusion is when a gas escapes from a container through a hole that is significantly smaller in diameter than the molecules' mean free path.

Gas molecules flow through a small opening in one container and into another by effusion. Graham's law allows rates of effusion to be compared at the same temperature. Diffusion is the random molecular motion-based movement of gas molecules through one or more other types of gas.

Rate of effusion of Orange / Rate of effusion of blue

= [Mblue / Morange]^1/2

Vrms = sqrt [(3RT/M)]

Vorange / Vblue = [ Mblue / Morange]^1/2

Rate of effusion of Orange / Rate of effusion of blue

= 565/ 369

= 1.531

Thus,  Balloon A, which has more blue and less orange, exhibits accurate effusion at a relative effusion rate of 1.303.

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The numbering of the compound which gives the methyl substituent the lowest number is 1-methylcyclohexene and 3-methylcyclohexene and not 2-methylcyclohexene.

In the reaction, the substrate is 2-methyl cyclohexanol. The reaction that takes place here is a dehydration reaction. In the reaction, the acid first protonates that -OH group to form water which is a good leaving group.

A carbocation is now formed and abstraction of hydrogen could occur at carbon number 1 or 3 and the numbering of the compound which gives the methyl substituent the lowest number is 1-methylcyclohexene and 3-methylcyclohexene and not 2-methylcyclohexene.

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Moreover, injuries may offer a hint or description of the culprit. The type and location of the injury may give away information about the suspect's physical attributes, such as height, weight, or age.

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Answer:

If n = 4, then the possible values of 1 and m depend on the equation or expression being used. Without more information, it is impossible to determine what the possible values of 1 and m might be. Can you please provide more context or information about the problem you are trying to solve?

The constructor specifications below will allow this code to behave as desired

d. public void geometricsequence(double initial, double mult)

Methods can return a value to the caller. If the return type (the type listed before the method name) is not void , the method can return the value by using the return statement.

The loan amount, interest rate, future value, and number of periods are the four factors for this approach. The first three are integers, and the fourth is a double-precision floating point value. A value may be returned to the caller by a method. The method can return the value by using the return statement if the return type, which is the type specified before the method name, is not void. The method caller will receive the value if the return keyword is used in a statement and it is followed by a value that corresponds to the return type. A new object with variables declared as in the class is returned by the constructor. Static variables are duplicated just once, whereas instance variables are created from scratch.

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Answer:

On the landscape, freshwater is stored in rivers, lakes, reservoirs, and creeks and streams. Most of the water people use everyday comes from these sources of water on the land surface.

Answer:

On the landscape, freshwater is stored in rivers, lakes, reservoirs, and creeks and streams. Most of the water people use everyday comes from these sources of water on the land surface.

Answer:

inner core

Explanation:

The empirical formula of the compound is C₂H₁₆S₂N₃O.

The moles of each element is as follows::

For CO₂:

Carbon (C) has a molar mass of 12.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of C in CO₂ = 2.08 g / 12.01 g/mol = 0.173 moles

Moles of O in CO₂ = 2.08 g / 16.00 g/mol = 0.130 moles

For H₂O:

Hydrogen (H) has a molar mass of 1.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of H in H₂O = 1.28 g / 1.01 g/mol = 1.27 moles

Moles of O in H₂O = 1.28 g / 16.00 g/mol = 0.080 moles

For SO₃:

Sulfur (S) has a molar mass of 32.06 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of S in SO₃ = 4.77 g / 32.06 g/mol = 0.149 moles

Moles of O in SO₃ = 4.77 g / 16.00 g/mol = 0.298 moles

For HNO₃:

Hydrogen (H) has a molar mass of 1.01 g/mol.

Nitrogen (N) has a molar mass of 14.01 g/mol.

Oxygen (O) has a molar mass of 16.00 g/mol.

Moles of H in HNO₃ = 3.48 g / 1.01 g/mol = 3.45 moles

Moles of N in HNO₃ = 3.48 g / 14.01 g/mol = 0.248 moles

Moles of O in HNO₃ = 3.48 g / 16.00 g/mol = 0.217 moles

The simplest whole-number ratio of the elements will be:

Carbon: 0.173 moles / 0.080 moles ≈ 2.16

Hydrogen: 1.27 moles / 0.080 moles ≈ 15.88

Sulfur: 0.149 moles / 0.080 moles ≈ 1.86

Nitrogen: 0.248 moles / 0.080 moles ≈ 3.10

Oxygen: 0.080 moles / 0.080 moles = 1

Therefore, the empirical formula is C₂H₁₆S₂N₃O.

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Answer:

This process is called mass spectrometry. In mass spectrometry, a sample is ionized, typically by bombarding it with high-energy electrons, and the resulting ions are separated based on their mass-to-charge ratio. The mass of the ions can be measured using a mass spectrometer, and this allows the determination of the atomic masses of the elements present in the sample. To obtain accurate results, it is generally necessary to measure the masses of a large number of atoms, as the precision of the measurement increases with the number of atoms that are measured

Explanation:

The carbon atoms that are in the compound shown are all sp2 hybridized.

We have to note that the compound cyclohexane is one of the compounds that belong to the category of the compounds that we call the cycloalkanes. The imnplication of this is that the compound would have a cyclic structure.

Each of the compounds in this group would have the carbon atoms that are in the ring to have a trigonal planar geometry and they would be sp2 hybridized and the sprain on the ring would depend on the ring size.

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The complete rate law should be like: Rate = k[NO][H2]^2

Rate = k[NO]^x[H2]^y, where x and y are the exponents for the concentration of nitric oxide (NO) and hydrogen (H2) respectively.

The rate law can be determined by performing experiments with different initial concentrations of NO and H2 and observing how the initial rate changes.

From the data provided,

It can be seen that increasing the concentration of NO by a factor of 2 results in an increase in the initial rate by a factor of 2^(x).

Similarly, increasing the concentration of H2 by a factor of 2 results in an increase in the initial rate by a factor of 2^(y).

Based on this information, x = 1 and y = 2 can be determined, giving us the rate law:

Rate = k[NO][H2]^2

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9.77 litres of NO2 are generated on average.

The balanced equation for the breakdown of N2O5 is as follows:

\(2N_2O_5(g) -- > 4NO_2(g) + O_2(g)\)

determine how many moles of N2O5 decompose:

\(V(N_2O_5) / Vm = n(N_2O_5)(N_2O_5)\)

where V(N2O5) = 4.86 dm3 is N2O5's volume and Vm(N2O5) is N2O5's molar volume under the circumstances stated in the ideal gas law:

\((R*T)/P = Vm = V/n\)

when the gas constant R is used.

the kelvin scale of temperature, T

The pressure is P.

The ideal gas law:

\(n(N_2O_5) = V(N2O5) / Vm(N_2O_5) = 4.86 dm3 / (24.46 L/mol) = 0.1982 mol\)

the number of moles of NO2 is:

\(n(NO_2 = 4/2 * n(N_2O_5) = 0.3964 mol\)

then,

\(n(NO_2 = 4/2 * n(N_2O_5) = 0.3964 mol\)

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Answer:

the answer is A to protect and support the cell

Answer:

A)

Explanation:

The molecules of Li₂O that would produce if you used up 6 atoms of Li(s) is 3.

It is an unstable inorganic and radical compound, used in the manufacture of glass and ceramic.

The balanced equation

\(\rm 6 Li(s) + O_2(g) \rightarrow 3 Li_2O(s)\)

If the atoms of lithium moves up to 6 the lithium oxide molecules will be 3, as you can see in the equation.

Thus, the molecules of Li will be 3.

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Answer:

D)

Explanation:

Aluminum has 3 valence electrons; therefore, there should only be 3 separate dots.

The correct electron dot diagram for Aluminium (Al) is option D.

The electron dot diagram is used to to represent the valence electrons of an element.

This can also be called the Lewis dot formulas.

The Al represents the element, Aluminium, which falls under group 3 of the periodic table.

This simply means that it has 3 Valence electrons in its outermost shell.

Also, valence electrons are those electrons that are located at the outer most shell of an atom which can be donated or shared during a chemical reaction.

Therefore, the diagram that represents the electron dot diagram for Al is D because it contains 3 dots which signifies the valence electrons of Al.

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Valence electrons are electrons found in the valence shell of atoms and they determine the reactivity of the atom.

Valence electrons refers to the electrons which are found in the outermost or valence shell of atoms.

Electrons are easily removed or added to the valence shell of atoms.

Therefore, valence electrons determine the reactivity of atoms.

This implies that atoms with few or almost full valence electrons are very reactive.

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i too used it

i thought it will help

nice time. .....

Explanation:

...................

Answer: E

Explanation:

Answer              A

Explanation:

Answer:

gravitational potential energy

Explanation:

i just did it

\(\boxed{\boxed{\pink{\bf \leadsto This \ is \ an \ example \ of \ Chemical \ change .}}}\)

Reaction of sodium metal with water is a chemical change . Sodium reacts with water to form sodium hydroxide. This is also an example of exothermic reaction as heat is released in this process. Sodium reacts vigoursly with water , it even reacts with the moisture present in the air . So it is stored in kerosene oil .

The reaction of sodium with water is :-

\(\boxed{\red{ \bf \underset{\blue{Sodium}}{2Na} + \underset{\blue{Water}}{2H_2O} \longrightarrow \underset{\blue{Sodium\: Hydroxide}}{2Na(OH)}+ \underset{\blue{Hydrogen}}{H_2}}}\).

The reaction of sodium metal with water is a chemical change, as a result formation of sodium hydroxide occurs.

The following points to be noted for the reaction of sodium with water:

Therefore, the reaction of sodium with water is a chemical change.

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The final concentration of the chloride ions is  0.32 M.

We know that we have to obtain the number of moles of the iron II chloride that was reacted in the solution and then we would have;

Number of moles of iron II chloride = 4.08g /127 g/mol = 0.032 moles

Given the fact that there are two chloride ions hence the amount of the chloride ions is 0.016 moles

The concentration of the silver nitrate = 50/1000  *  0.60 M

= 0.03 moles

Thus we would have a final concentration of 0.016 moles/ 0.05

= 0.32 M

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Answer:

3 moles of NH₄Cl

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

NH₃(g) + HCl(g) → NH₄Cl(s) ΔH = –176 kJ

From the balanced equation above,

1 mole of NH₄Cl where obtained when the change in enthalphy (ΔH) was –176 kJ.

Finally, we shall determine the number of mole of NH₄Cl produced when the change in enthalphy (ΔH) is –528 kJ. This can be obtained as follow:

From the balanced equation above,

1 mole of NH₄Cl where obtained when the change in enthalphy (ΔH) was –176 kJ.

Therefore, Xmol of NH₄Cl will be obtained when the change in enthalphy (ΔH) is –528 kJ i.e

Xmol of NH₄Cl = –528 / –176

Xmol of NH₄Cl = 3 moles

Thus, 3 moles of NH₄Cl where obtained from the reaction.

To solve the dilution problem, we can use the formula:

C₁V₁ = C₂V₂

Where:

C₁ is the initial concentration,

V₁ is the initial volume,

C₂ is the final concentration, and

V₂ is the final volume.

Given:

C₁ = 12 M (concentration of the concentrated HCl),

V₂ = 500 mL (final desired volume),

C₂ = 2.0 M (final desired concentration).

Let's solve for V₁:

C₁V₁ = C₂V₂

(12 M)(V₁) = (2.0 M)(500 mL)

Cross multiplying:

12V₁ = 2.0 × 500

12V₁ = 1000

V₁ = 1000 / 12

V₁ ≈ 83.33 mL

Therefore, the chemist should measure out approximately 83.33 mL of concentrated 12 M HCl to produce 500 mL of 2.0 M HCl.\(\)

Answer:

the answer is A. cooking the eggs

Answer:

A. Cooking the eggs

Explanation:

Cooking the eggs is a chemical change because it's a permanent change. There's no way to get the eggs back in its original form as an egg. Breaking the egg, stirring the egg, or even putting spices on the eggs are all examples of physical changes because they don't change the eggs' chemical composition. They only change its appearance.

Answer:

D

Explanation:

The ratio of C6H12O6 (which will be referred to as "the carb") to oxygen is 1 to 6, so if we find an answer which has the same ratio, it should be chosen. A is 1:3
B is even worse with a ratio of the carb to oxygen of 1:2
C is the same as B, 1:2
D has a ratio of the carb to oxygen of 1:6, which is what we are looking for.