How many grams are in 1.11 molecules of N2?

Answer:

HELIUM IS HE ANSWER

Explanation:

GOOD LUCK

Answer:

The answer to your question is given below.

Explanation:

Data obtained from the question include:

Sodium, Na => 1s2 2s2 2p6 3s1

Magnesium, Mg => 1s2 2s2 2p6 3s2

Aluminium, Al => 1s2 2s2 2p6 3s2 3p1

Sodium has 1 valence electron. If we remove the valence electron, sodium metal will become an ion. Thus, the electronic configuration becomes

1s2 2s2 2p6.

Magnesium has 2 valence electrons. If we remove the valence electrons, magnesium metal will be an ion. Thus, the electronic configuration becomes

1s2 2s2 2p6.

Aluminium has 3 valence electrons. If we remove the valence electrons, aluminum metal will become an ion. Thus, the electronic configuration becomes

1s2 2s2 2p6.

The gas mileage for the car is approximately 29.01 miles per gallon.

First, we need to convert the distance traveled from kilometers to miles, and the volume of gasoline from liters to gallons, as follows:

97.2 km = 97.2/1.60934 miles ≈ 60.422 miles

7.88 L = 7.88/3.78541 gallons ≈ 2.082 gallons

Therefore, the gas mileage for the car in miles per gallon can be calculated by dividing the distance traveled by the volume of gasoline used, as follows:

Gas mileage = Distance traveled / Volume of gasoline used

= 60.422 miles / 2.082 gallons

≈ 29.01 miles per gallon

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There are two properties that can be used to identify an element: the atomic number or the number of protons in an atom. The number of neutrons and number of electrons are frequently equal to the number of protons, but can vary depending on the atom in question.

If you add 5 ml of 0.5 M NaOH solution to 20 ml each of buffer B (with a pH of 4.03) and buffer C, the buffer whose pH will change the least is buffer B.

What is a buffer?

A buffer is a solution that resists changes in pH when acid or alkali is added. A buffer solution is a solution that contains a weak acid and its corresponding weak base or a weak base and its corresponding weak acid.

The Henderson-Hasselbalch equation can be used to calculate the pH of a buffer solution before and after adding a strong base or acid.

The equation is pH = pKa + log ([A-]/[HA])

where:pKa is the dissociation constant for the acid[A-] is the conjugate base of the acid when a command (such as NaOH) is added to a buffer solution, the base reacts with the weak acid to form the conjugate base of the acid and water. The addition of the conjugate base of the acid causes the pH of the solution to rising.

When an acid (such as HCl) is added to a buffer solution, the acid reacts with the weak base to form the conjugate acid of the base and water. The addition of the conjugate acid of the base causes the pH of the solution to decrease. Based on the above equation, pH change will be minimum in Buffer B. Therefore, the buffer whose pH will change the least is buffer B.

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Pressure will it have if it's cooled is 0.264 atm

It is given that

volume of Hydrogen gas = 100.0 mL

pressure = 300 Torr

1 torr = 0.00132 atm

300 Torr = 0.396 atm

temperature 1 = 27°C = 300 K

temperature 2 = –73°C = 200 K

We have to find

pressure

Gay-Lussac's Law or Third Gas Law states that for a constant volume, the pressure is directly proportional to absolute temperature: P alpha T; also stated as P/T = K, where K is a constant, and similarly, P1/T1 = P2/T2

0.396/300 = P2/200

P2 = 0.396 x 200/300 = 0.264 atm

Hence, Pressure will it have if it's cooled is

0.264 atm

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Solubility of hydroxyapatite in:

Concentrated HCl: High solubility

Dilute HCl: Moderate solubility

Dilute Citric acid: Low solubility

Prediction of hydroxyapatite solubility in each of the given solutions:

1. Concentrated HCl: Hydroxyapatite will have high solubility in concentrated HCl. This is because HCl is a strong acid, and in concentrated form, it has a high amount of H+ ions. These ions will react with the hydroxyapatite, breaking it down and dissolving it effectively.

2. Dilute HCl: Hydroxyapatite will have moderate solubility in dilute HCl. Since the concentration of H+ ions in dilute HCl is lower than in concentrated HCl, the reaction with hydroxyapatite will still occur but at a slower rate, leading to a lesser extent of dissolution.

3. Dilute citric acid: Hydroxyapatite will have low solubility in dilute citric acid. Citric acid is a weak acid, and in dilute form, it has a much lower concentration of H+ ions than HCl. As a result, the reaction with hydroxyapatite will be less effective, causing limited dissolution.

In summary, the solubility of hydroxyapatite is highest in concentrated HCl, followed by dilute HCl, and lowest in dilute citric acid.

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The following reactions of alkenes is not stereospecific is C. acid-catalyzed hydration reaction (H₂O/H₂SO₄)

Stereospecific reactions occur when the stereochemistry of the reactant is retained in the product. These types of reactions are distinguished by the use of double-headed arrows in reaction mechanisms to demonstrate the conservation of stereochemistry. The following reactions of alkenes stereospecific are hydrogenation (H₂/P₁), bromination (Br₂ in CH₂Cl₂), bromohydrin formation (Br₂/H₂O).

The acid-catalyzed hydration reaction (H₂O/H₂SO₄) of alkenes is not stereospecific because the H and OH atoms can be added to either face of the alkene's double bond. When the reaction occurs, an intermediate carbocation is formed, which is planar. This carbocation can either be attacked by the nucleophile from above or below, resulting in the formation of an equal amount of stereoisomers. Therefore, the correct answer is C. acid-catalyzed hydration reaction (H₂O/H₂SO₄) is not stereospecific.

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The rate of consumption of O (g) if water vapor is consumed at a rate of 1.60 x 10⁻¹⁰ M/s is 8.0 * 10⁻⁹ M/s.

The rate of a chemical reaction is known as the reaction rate or rate of reaction. It is proportional to the rise in product concentration per unit of time and the fall in reactant concentration per unit of time.

Considering the given equation:

The equation of the reaction is: O (g) + H₂O (g) ---> 2 •OH (g)

The rate of the consumption of water vapor will be twice the rate of consumption of O (g).

Water vapor is consumed at a rate of 1.60 x 10⁻¹⁰ M/s.

Hence, O (g) will be consumed at a rate of 0.5 * 1.60 x 10⁻¹⁰ M/s = 8.0 * 10⁻⁹ M/s.

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Storing red blood cells (RBCs) requires proper preservation techniques to maintain their viability and functionality. One method is the high glycerol preservation method, which uses a high concentration of glycerol (40%) to protect the cells during storage. The temperature at which the RBCs are stored also plays a crucial role in determining their longevity.

Out of the options listed, the correct temperature for storing RBCs prepared with high glycerol preservation method is at 0°C or lower. At this temperature, the glycerol solution slows down cellular metabolism, preserving the viability and functionality of the RBCs for a longer period of time. Storing RBCs at 65°C or lower may damage the cells, rendering them unusable for transfusion. Similarly, storage at 20°C or lower may result in short-term preservation but is not ideal for long-term storage as it may cause a significant reduction in RBC viability. Storing RBCs at 10°C or lower may provide short-term preservation, but it may not be optimal for long-term storage as the low temperature may cause freezing of the cells, leading to irreversible damage.

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The concentration of the NaOH solution is 10.00 g/dm³.

To calculate the concentration in g/dm³ of a solution of NaOH containing 0.25 moles in 1 dm³, we need to know the molar mass of NaOH.

The molar mass of NaOH is calculated as follows:

Na (Sodium) = 22.99 g/mol

O (Oxygen) = 16.00 g/mol

H (Hydrogen) = 1.01 g/mol

Molar mass of NaOH = 22.99 g/mol + 16.00 g/mol + 1.01 g/mol = 40.00 g/mol

Now, we can calculate the concentration (C) using the formula:

C = (moles of solute) / (volume of solution in dm³)

C = 0.25 moles / 1 dm³

C = 0.25 mol/dm³

To convert moles to grams, we can multiply the molar mass by the number of moles:

Concentration in g/dm³ = (0.25 mol/dm³) * (40.00 g/mol)

Concentration in g/dm³ = 10.00 g/dm³

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The pressure of gas canister at 1250° Celsius is 312 atm which is more than the total internal pressure. Hence, it will explode.

Calculating the pressure of the volume of gas after being heated to 1250° Celsius. This will be done through ideal gas equation which is as follows -

PV = nRT, where P is pressure, V is volume, n is number of moles, R is gas constant and T is temperature.

Converting temperature to Kelvin

T = 1250 + 273

T = 1523 K

P = 3.5×0.082×1523/1.4

Performing multiplication on Right Hand Side of the equation

P = 437.1/1.4

Performing division on Right Hand Side of the equation

P = 312.2 atm

The gas canister will explode as the pressure exceeds.

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Barium-131's radiation level won't reach 1/4 of its initial level for 24 hours.

ln[A] t = -kt + ln[A] 0 is the integrated rate rule for the first-order reaction A's products.

A straight line is produced when the natural log of [A] is plotted as a function of time since this equation has the form y = mx + b.

How is the length of a half-life determined?

The amount of time needed for the reactant concentration to drop to half its initial value is known as the half-life of a reaction. A first-order reaction's half-life is a constant that is correlated with its rate constant:

t 1/2 = 0.693/k.

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The concentration of sodium ion, Na⁺ in the solution, given that 23.6 grams of Na₃PO₄ is dissolved in 750 mL of water is 0.576 M

We'll begin by obtaining the molarity of the solution. This is illustrated below:

Molarity = mole / volume

Molarity = 0.144 / 0.75

Molarity = 0.192 M

Finally we shall determine the concentration of the sodium ion, Na⁺. Details below:

Na₃PO₄(aq) <=> 3Na⁺(aq) + PO₄³⁻(aq)

From the balanced equation above,

1 mole of Na₃PO₄ contains 3 moles of Na⁺

Therefore,

0.192 M Na₃PO₄ will contain = 0.192 × 3 = 0.576 M Na⁺

Thus, the concentration of Na⁺ is 0.576 M

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Answer: Possibility of a single replacement reaction

Explanation:

The activity of the series of element is determined by the single replacement reactions. The activity series of element can be used to predict the possibility of a single replacement reaction.

A single replacement reaction is one in which one substance is replacing the other. The replacement of a metallic ion in solution by a metal atom higher in the activity series than the metal in solution falls into this category of reactions.

The reaction is depending on the reactivity of the elements. If the reactivity of the elements is very low, then the reaction very slow, some time reaction can not take place. To get reaction there is some driving force is needed.

The relative position of the two elements in the activity series provides the driving force for this kind of reaction. More active elements undergo readily reaction then less reactive like noble gas elements. It very necessary to elements very active to get react.

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Answer:

B

Explanation:

When it freezes, it will be a solid. The molecules will barely move, not as much as in the other answer choices.  

The spin of the electron is represented by the spin quantum number, ms; ms = +1/2 or -1/2.

Electron in orbital type 2pz.

The primary quantum number, n=1, 2, 3, and n=2 (the second energy level), is one of the four quantum numbers that are assigned to each electron in an atom to define that electron's state.

An atomic orbital's azimuthal quantum number characterizes the form of the orbital and is used to calculate the orbital's angular momentum. When l = 1, the p subshell is defined as l = 0,1...n-1.

The orbital in which the electron is placed is indicated by the magnetic quantum number, ml. ml = -l...+l, and ml = 0 indicates the Pz orbital.

The spin of the electron is represented by the spin quantum number, ms; ms = +1/2 or -1/2.

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Answer:

A is √34

Explanation:

We can solve for the hypotenuse "A" using the Pythagorean theorem.  

a²+b²=c²

3²+5²=c²

9+25=c²

34=c²

√c=√34

c=√34 --> A

Answer:

(a) 156.41 (b) 10 and 14 (c) 16

Explanation:

The resulting temperature of a closed container that has a pressure of 2.35atm, and a volume of 1.2L, and contains 76.33g Cl2 is 31.8K.

The temperature of a given gas can be calculated by using the ideal gas law equation:

PV = nRT

Where;

no of moles of Cl2 = 76.33g ÷ 70.91g/mol = 1.08mol

2.35 × 1.2 = 1.08 × 0.0821 × T

2.82 = 0.088T

T = 2.82/0.088

T = 31.8K

Therefore, the resulting temperature of a closed container that has a pressure of 2.35atm, and a volume of 1.2L, and contains 76.33g Cl2 is 31.8K.

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Cadmium (Cd) element is classified as a metal.

Metals are characterized as elements with high electrical conductivity, transparency, brilliance, and malleability, as well as the ability to rapidly shed electrons and create positive ions (cations).

Metals are to the left of the line (excluding hydrogen, which is a nonmetal), nonmetals are to the right of the line, and elements immediately adjacent to the line that exhibit properties of both metals and nonmetals and are called as metalloids.

So, boron, antimony and bismuth are classified as metalloids, where the element cadmium is a metal.

Hence, the correct option is D

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Answer:

1. Heat from the pan transfers directly to the oil. 2. Heat from the pan transfers directly to the oil. 3. heated by the radiation in the microwave.

Explanation:

Answer:

Chlorine.

Explanation:

Diatomic Elements = Hydrogen, Nitrogen, Fluorine, Oxygen, Iodine, Chlorine, Bromine.

Easy way to remember! Have No Fear Of Ice Cold Beer!

Rate = 3.37x10-3 M^-1 min-1 [A]^2 and the initial concentration of a is 0.122M.

A rate law indicates the rate of a chemical response depends on reactant concentration. For a response inclusive of the price regulation commonly has the form rate = ok[A]ⁿ, in which okay is a proportionality constant known as the fee regular and n is the order.

The charge of a chemical response is, perhaps, its maximum crucial asset because it dictates whether or not a reaction can arise all throughout an entire life. knowing the charge regulation, an expression concerning the price to the concentrations of reactants can assist a chemist to modify the response conditions to get an extra suitable rate.

half-life is the time taken for the radioactivity of a substance to fall to 1/2 its authentic cost whereas implies existence is the common life of all the nuclei of a particular risky atomic species.

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Answer:

1. the reaction rates can not decrease

2. correct!

3. correct!

4. decreasing the amount of reactants

5. correct!

Explanation:

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Taking into account the definition of molar mass and molarity, the concentration of 12.5g KCl in 250 ml of water is 0.672 moles/L.

Molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in one liter of solution.

In ther words, molarity indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

molarity= number of moles÷ volume

Molarity is expressed in units moles/L.

The molar mass of substance is defined as the amount of mass that a substance contains in one mole.

The molar mass of KCl is 74.55 g/mole. If you have a mass of KCl of 12.5 g, the amount of moles of the compound can be calculated as:

amount of moles= 12.5 g÷ 74.55 g/mole

amount of moles= 0.168 moles

You know that the volume of the solution is 250 mL of 0.250 L (being 1000 mL= 1 L). Replacing in the definition of molarity:

molarity= 0.168 moles÷ 0.250 L

Solving:

molarity= 0.672 moles/L

Finally, the concentration is 0.672 moles/L.

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