Calculate the number of grams of HCl that can react with 0.500 g of Al(OH)3 g HCl C) Calculate the number of grams of AlCl3 formed when 0.500 g of Al(OH)3 reacts. g AlCl3

Answer: The chemical equation is \(HCl(g)+NH_3(g)\rightarrow NH_4Cl(s)+42.1kCal\)

Explanation:

There are 2 types of reactions that are classified based on enthalpy change:

Endothermic reactions: They are defined as the reactions where heat is absorbed by the reaction. The change in enthalpy of the reaction is always positive.

Exothermic reactions: They are defined as the reactions where heat is released by the reaction. The change in enthalpy of the reaction is always negative.

Given values:

Energy released for 1 mole of HCl reacted = -42.1 kCal

The chemical equation for the formation of ammonium chloride follows:

\(HCl(g)+NH_3(g)\rightarrow NH_4Cl(s)+42.1kCal\)

Explanation:

A pure substance is a form of matter that has a constant composition and properties that are constant throughout the sample. Mixtures are physical combinations of two or more elements and/or compounds

Answer :

-111°C

Hope it helps

The final temperature of the gas in the balloon is equal to -110.6°C.

Gay-Lussac's law can be described as when the volume of the gas is kept constant then the pressure (P) is directly proportional to the absolute temperature (T in kelvin) of the gas.

The mathematical representation of Gay Lussca's law can be written as follows:

P/T = k

The pressure (P) of a gas is always directly proportional to the temperature (T) of the gas.

P ∝ T                               (where volume  is constant)

\(\frac{P_1}{T_1} =\frac{P_2}{T_2}\)

Where P₁, T₁, P₂, and T₂  are the initial and final pressure and temperature.

The initial temperature of the balloon, T₁ = 25 °C = 25 + 273 = 298 K

The initial pressure of the balloon, P₁  = 2.55 atm

The final pressure of the balloon, P₂ = 1.39 atm

Substituting temperatures and pressures of the gas in the balloon in the above equation:

2.55/298 = 1.39/T₂

T₂ = 162.4 K

T(K) = 273 + T(°C)

T(°C) = 162.4 - 273 = - 110.6°C

Therefore, the final temperature of the gas inside the balloon is -110.6°C.

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Answer:

Empirical formula of a compound means that it provides simplest ratio of whole number.

Explanation:

Mass of boron and chlorine is 9.224% and 90.74%

Answer:

good day philipines

Explanation:

Answer:

hello

Explanation:

answer and explanation

from the reaction equation

2KI + Cl₂ > 2KCl + I₂

we are given the pressure, volume and Temperature of the reaction. therefore we can used the ideal gas equation to determine the numner of mols of I₂ that formed

PV =nRT

n = PV/RT

= (0.75x 8.5)/(0.0821 x 295)

= 0.25 mols of I₂

we can see that the mole ratio between KI and I₂ is 2:1

therefore the number of mols of KI that must have reacted are

2/1 x 0.25 = 0.5 mols of KI

to find the mass we simply use

mass = mols x Molar mass

= 0.5 mols x 166.0g/mol

= 83 grams were used

Answer:

\(\huge\boxed{\sf 18.02 \ amu}\)

Explanation:

Molecular mass of water:

= H₂O

= 2(Atomic mass of H) + (Atomic mass of O)

= 2(1.0079) + 15.9994

= 2.0158 + 15.9994

= 18.02 amu

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

The average atomic mass of the element is 12.0107 amu.

To calculate the average atomic mass of the element in question, we can use the following formula:

average atomic mass = (mass of isotope 1 x abundance of isotope 1) + (mass of isotope 2 x abundance of isotope 2)

where "mass of isotope 1" is the mass of the first stable isotope (13 amu in this case), "abundance of isotope 1" is the percentage of that isotope in the element (1.07% in this case), "mass of isotope 2" is the mass of the second stable isotope (12 amu in this case), and "abundance of isotope 2" is the percentage of that isotope in the element (98.93% in this case).

Substituting the given values in the formula, we get:

average atomic mass = (13 amu x 1.07%) + (12 amu x 98.93%)

average atomic mass = (0.1391 amu) + (11.8716 amu)

average atomic mass = 12.0107 amu

Therefore, the average atomic mass of the element is 12.0107 amu.

This means that on average, one atom of this element weighs 12.0107 atomic mass units (amu), which is slightly heavier than the most abundant isotope (12 amu) due to the presence of the less abundant isotope (13 amu). This concept is important in chemistry because the mass of atoms plays a crucial role in determining their chemical and physical properties. The knowledge of the average atomic mass of an element is important in a wide range of applications, including analytical chemistry, geochemistry, and nuclear physics.

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Answer:C

Explanation:I took the test

Answer:

It is a south pole because the field lines enter the magnet at this end.

Explanation:

These four are soluble compounds and we will determine which of them produce three ions by looking at their dissociation equations.

a) K₂SO₄ ----> 2 K⁺ + SO₄²⁻ (produces 3 ions)

b) Al(NO₃)₃ ---> Al³⁺ + 3 NO₃⁻ (produces 4 ions)

c) Li₃PO₄ ----> 3 Li⁺ + PO₄³⁻ (produces 4 ions)

d) Ca(NO₃)₂ ----> Ca²⁺ + 2 NO₃⁻ (produces 3 ions)

Answer: a) K₂SO₄ and d) Ca(NO₃)₂

Answer:

25J

Explanation:

Kinetic energy = (mv^2)/2. So (.5)(10^2)/2 = 25 J

Answer:

see explaination

Explanation:

Case 1) When we consider vapor pressure of H2O;

Let the pressure is 1 atm OR 760 torr.

As H2 is collected over water, we have to consider the vapor pressure of H2O as well.

Using data i.e. vapor pressure of H2O at 40° C = 55.365 torr

So, pressure of H2 = P = 760 - 55.365 = 704.635 torr = 704.635/760 = 0.9272 atm

Volume of H2 = 80 ml = 0.08 liter

Temperature (T) = 40 + 273 = 313 K

Gas constant (R) = 0.0821 L atm/mol K

Let n is moles of H2. Applying ideal gas equation;

PV = nRT

n = PV/RT = 0.9272 * 0.08 / 0.0821 * 313

n = 0.00289 moles

Mass of H2 = moles * molar mass = 0.00289 * 2.016 = 0.00582 grams

OR 5.8*10^-3 grams ...Answer

----> Case 2) When we don't consider vapor pressure;

Pressure of H2 = 1 atm, all other parameters will remain same as in case 1.

So, mass of H2 = 6.3*10^-3 grams

But Case 1) is correct approach as in question it is mentioned that H2 is collected over water.

When the reaction of  Grignard reagent reacted with methanol will yield a tertiary alcohol. Therefore, Option C tertiary alcohol is correct.

Contains a carbon-metal link, Grignard reagents are chemicals used in catalysis. They generally result from the anhydrous reaction of magnesium metal with an alkyl or aryl halide. Because of their high reactivity, Grignard reagents frequently act as nucleophiles in organic reactions.

An alkyl group from a Grignard reagent binds to the oxygen atom of methanol (CH3OH) when it interacts with the methanol, breaking the carbon-metal connection. A precursor alkoxide is created as a result. The equivalent alcohol is then produced by protonating the intermediate alkoxide.

The reaction of a Grignard reagent with methanol leads to the formation of a tertiary alcohol.

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Answer:

H2SO4(acid), NaOH(base)

Explanation:

Most of the elements to the left of the stair-step line in the periodic table exist as liquids in the periodic table and the correct option is option B.

The periodic table is a tabular arrangement of the chemical elements by increasing atomic number which displays the elements so that one may see trends in their properties.

Elements are arranged from left to right and top to bottom in the order of their increasing atomic numbers. Thus,

Therefore, Most of the elements to the left of the stair-step line in the periodic table exist as liquids in the periodic table and the correct option is option B.

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Answer:

C

I hope that this helps.

The value of x is 1.

To solve the linear system using Cramer's rule, we need to find the value of x in the equation 1x + 3(2) + 9 = 16.

Simplifying the equation, we have:

x + 6 + 9 = 16

x + 15 = 16

x = 16 - 15

x = 1

Therefore, the value of x is 1.

Cramer's rule is a method used to solve systems of linear equations by using determinants. In this case, we have a single equation with one variable, so the determinant involved is a 1x1 matrix. The determinant of a 1x1 matrix is simply the value of the element.

The determinant of the coefficient matrix in this equation is 1. The determinant of the entire system is the determinant of the coefficient matrix divided by the determinant of the matrix formed by replacing the column of the variable with the constants.

Since the determinant of a 1x1 matrix is the value of the element, we have:

determinant of the entire system = determinant of the coefficient matrix / determinant of the constant matrix

= 1 / 1

= 1

Therefore, the determinant of the entire system is 1.

Using Cramer's rule, we can solve for the value of x by dividing the determinant of the matrix formed by replacing the column of the variable with the constants by the determinant of the coefficient matrix. In this case, both determinants are 1. Thus, The value of x is 1.

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The sample containing 1.00 mg of iodine-129 would have an activity of 1900 disintegrations per second.

The first step in solving this problem is to determine the number of iodine-129 atoms present in 1.00 mg of the sample. We can use the Avogadro's number (6.022 × 10^23 atoms per mole) and the molar mass of iodine-129 (129 g/mol) to calculate this:

Number of iodine-129 atoms = (1.00 mg / 129 g/mol) x (6.022 × 10^23 atoms/mol)

= 4.66 × 10^16 atoms

Next, we can use the half-life of iodine-129 (1.7 × 10^7 years) to calculate the decay constant (λ) using the following equation:

λ = ln(2) / half-life

λ = ln(2) / 1.7 × 10^7 years

= 4.09 × 10^-8 per year

Now, we can use the decay constant and the number of iodine-129 atoms to calculate the activity (A) in disintegrations per second (Bq):

A = λ x N

A = (4.09 × 10^-8 per year) x (4.66 × 10^16 atoms)

= 1900 Bq

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Answer:.633

Explanation:

I have know idea but it was right

Answer:

O.633%

Explanation:

For all those Acellus kids XD

Answer:

Line A

Explanation:

In consideration of Charles's law of gases, temperature is directly proportional to pressure of the gas.

The following elements which you would expect to be least metallic is Se and is therefore denoted as option B.

These are chemical elements that are usually shiny solids that conduct heat or electricity and examples include iron, tin etc.

Se is known as Selenium and it is the element which is the least metallic element, because it is the farthest to the right when compared to the other options provided. We should note that metallic character decreases going across a period which is therefore the reason why it was chosen as the correct choice.

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Answer:

9.9 x 10^-2 g*cm²/s²

Explanation:

9.9 × 10^-9 kg*m²/s² =    g*cm²/s²

1 kg*m²/s² = 1 joule(s)

1 g*cm²/s² = 1 erg(s)

britannica

1 kg = 1000g = 1x10^3 g

1 m²= 10000 cm² = 1x10^4 cm²

add the exponents 3 and 4 which = 7

-9 + 7 = -2

9.9 × 10^-9 kg*m²/s² = 9.9 x 10^-2 g*cm²/s²

The cell potential for the reaction Mg(s)+Fe2+(aq)Mg2+(aq)+Fe(s) is 2.87 V at 89 degrees Celsius.

The Nernst equation can be used to compute this: Where E° cell is the standard cell potential, R is the gas constant, T is the temperature in Kelvin, n is the number of electrons transported, F is the Faraday constant, and Q is the reaction quotient, E cell is defined as E° cell - (RT/nF)lnQ.

E° cell = -2.37 V, R = 8.314 J/K-mol, T = 362 K, n = 2, F = 96485 C/mol, and Q = [Mg2+]/[Fe2+] = 0.110/2.80 = 0.039 in this instance. The Nernst equation using these values as input produces the result E cell = -2.37 - (8.314*362/2*96485)ln(0.039) = 2.87 V.

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Answer:

jumm453685ruuhkcswch