Methanol and isopropyl alcohol are types of alcohol that ______.

Answer:

i think it 1/2

Explanation:

Answer:no answer

Explanation:

Temperature. Usually reactions speed up with increasing temperature. Physical state of reactants. Powders react faster than blocks - greater surface area and since the reaction occurs at the surface we get a faster rate.

Answer:

option 2

Explanation:

The actual formula for volume for a cube is the length multiplied by the width and then multiplied by the height. Since all three measurements are the same, the formula results in the measurement of one side cubed. For the example, 5^3 is 125 cm^3. Multiply the volume by the known density, which is the mass per volume.

If a water heater can supply 40 KBTU/h then it will take 35.64 second to heat the water. This is calculated using the specific heat of water and the power concept.

The electrical energy is used totally depends on the total power used by all the electrical devices and the total time they are used. One kilowatt hour is equal to 1000 watts of power used for one hour of time.

time taken= energy required/ power delivered

System is used to define the measurement of a physical quantity. It is termed as the unit. Different types of unit measurement systems used are  the SI unit system, MKS unit system, Imperial unit system, British unit system, etc.

1 BTU = 1055.6 J

Specific heat of water Cw. = 4186 J/Kg.

Time taken = energy required / power

= 100 . Cw. / 1055.6 * 40*

= 100 * 4186 / 1055.6 * 40 .

= 9.9 * hours

= 35.64 sec

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Answer:

30.5%

Explanation:

A solution's percent concentration by mass,

% m/m

, tells you how many grams of solute, which in your case is an unknown acid, are present in 100 g of solution

As you know, a solution contains a solute and a solvent, which more often than not is water. This means that a solution's

% m/m

concentration tells you how many grams of solute and grams of solvent must be mixed to get

100 g

of solution.

In your case, you know that you get

1.32 g

of acid in

4.33 g

of solution. To find the solution's percent concentration by mass, use this as a conversion factor to figure out how many grams of solute you'd get in

100 g

of solution

Answer:

as u should. candy ain't even that tempting >^<

Answer:

How about free hoodies and chocolate.....Jkjkjk.....that happened to me once then I got rap edh

Explanation:

The theoretical yield of Fe₂O₃ is 0.0059 moles and the percent Yield is 44.2%

Using stoichiometry to calculate the theoretical yield of Fe₂O₃:

From the balanced chemical equation, 4 moles of Fe react with 3 moles of O₂ to produce 2 moles of Fe₂O₃. Therefore, set up the following proportion:

3.4 g O₂ / 32 g/mol O₂ = x mol Fe₂O₃ / (2 mol Fe / 4 mol O₂ x 55.85 g/mol Fe)

Solving for x:

x = 3.4/32 x 4/3 x 1/55.85 x 2 = 0.0059 moles Fe₂O₃

Therefore, the theoretical yield of Fe₂O₃ is 0.0059 moles.

From the balanced chemical equation, 4 moles of Fe react with 3 moles of O₂ to produce 2 moles of Fe₂O₃. Therefore, for every 4 moles of Fe that react, expect to produce 2 moles of Fe₂O₃.

Using this information, set up the following proportion:

4 mol Fe / 55.85 g/mol Fe = 0.0059 mol Fe₂O₃ / x

Solving for x:

x = 55.85 x 0.0059 / 4 = 0.082 g Fe

Therefore, the theoretical yield of Fe is 0.082 g.

To calculate the percent yield, use the following formula:

Percent Yield = (Actual Yield / Theoretical Yield) x 100%

Substituting the values calculated:

Percent Yield = (0.0059 mol Fe₂O₃ / 0.082 g Fe) x 100% x (1.5 moles H₂O / 2 moles Fe₂O₃)

Percent Yield = 44.2%

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Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

From the question we have

force = 300 × 5

We have the final answer as

Hope this helps you

The angular momentum quantum number, symbol L, is related to the orientation of an orbital in space.

The correct statements about the angular momentum quantum number are: The value of L dictates the allowed values of the magnetic quantum number (m). The number of possible L values is determined by the value of the principal quantum number (n).

The angular momentum quantum number, L, describes the shape of an atomic orbital. It determines the allowed values of the magnetic quantum number (m) and provides information about the orientation of the orbital in space. The value of L can range from 0 to (n-1), where n is the principal quantum number.

The first correct statement is that the value of L dictates the allowed values of the magnetic quantum number (m). For each value of L, there are 2L+1 possible values of m, ranging from -L to +L.

The fourth correct statement is that the number of possible L values equals the value of n. For example, if n = 3, the possible values of L are 0, 1, and 2.

The last statement is incorrect. The allowed values of L are not determined by the value of n. Instead, the values of L are limited by the range of 0 to (n-1).

Understanding the angular momentum quantum number is important in understanding the quantum mechanical properties of atomic orbitals and their arrangement within an atom.

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Answer:

The correct option is;

c. Bromine, zinc, calcium, radium

Explanation:

The atomic radii of the elements as arranged in the periodic table decreases across the period and increases down the groups

The location of each of the elements are;

Zinc: Period 4, Group 12

Calcium: Period 4, Group 2

Radium: Period 7, Group 2

Bromine: Period 4, Group 17

Therefore, the element with the largest atomic radius = Radium

The element with the smallest atomic radius = Bromine

Calcium comes before zinc on period 4, therefore, the atomic radius of calcium is larger than that of zinc

The rank of the elements from smallest to largest atomic radius is therefore;

Bromine, zinc, calcium, radium.

c

nitrogen gas + hydrogen gas produces ammonia

N2( g)+ H2(g)=NH3( g)

hydrogen valency= 1, nitrogen =3 .Exchange them= NH3

balance

put 2 in front of NH3 to make nitrogen 2 .Them hydrogen is now 6,add3 to hydrogen to make them balance.

N2+3H2=2NH3

Answer:

136 g Al₂O₃

Explanation:

Assuming you do not need to find the limiting reactant, to find the mass of Al₂O₃, you need to (1) convert grams O₂ to moles O₂ (via molar mass), then (2) convert moles O₂ to moles Al₂O₃ (via mole-to-mole ratio from equation coefficients), and then (3) convert moles Al₂O₃ to grams Al₂O₃ (via molar mass). It is important to arrange the conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the sig figs of the given value (64.0 g).

Molar Mass (O₂): 32 g/mol

Molar Mass (Al₂O₃): 102 g/mol

4 Al + 3 O₂ -----> 2 Al₂O₃

64.0 g O₂           1 mole           2 moles Al₂O₃            102 g
-----------------  x  --------------  x  ------------------------  x   -------------  =  136 g Al₂O₃
                             32 g               3 moles O₂             1 mole

Answer:

Explanation:

Based of the fact that you were given 2 masses I would assume this to be a limiting reagent question. However amount on the left side both equal 2. Ignoring limiting reagents and focusing on just O2 the steps would be:

1. Make sure the equation is balanced ( already given)

2- Use given values to find the mols of O2 (mass/molar mass)

3. Mols are conserved but due to the coefficients the molar value from O2 must be divided by three and multiplied by 2 to ensure proper ratios

4. Using that amount the mass can derived using amount/molar mass

5. Use proper significant digits and units(3 in this case)

Answer:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Explanation:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Measurement is a process of finding a number that shows the amount of something.

Brainliest? Thanks!

In 0.75 moles of caffeine, there are a total of 6 carbon atoms, 7.5 hydrogen atoms, 3 nitrogen atoms, and 1.5 oxygen atoms.

To determine the total number of atoms in 0.75 moles of caffeine, we need to consider the molecular formula of caffeine, which is C8H10N4O2. The molecular formula provides the ratios of each element present in the compound. By multiplying the number of atoms in each element by the corresponding coefficient in the molecular formula, we can calculate the total number of atoms. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms in each molecule of caffeine. Multiplying these values by 0.75 moles will give us the total number of atoms in 0.75 moles of caffeine.

The molecular formula of caffeine, C8H10N4O2, provides the number of atoms for each element present in one molecule of caffeine. In this case, there are 8 carbon (C) atoms, 10 hydrogen (H) atoms, 4 nitrogen (N) atoms, and 2 oxygen (O) atoms.

To calculate the total number of atoms in 0.75 moles of caffeine, we need to multiply the number of atoms for each element by the coefficient in the molecular formula, and then multiply that by the number of moles (0.75 moles).

For carbon (C): 8 atoms x 0.75 moles = 6 atoms (since there are 8 carbon atoms in one molecule of caffeine).

For hydrogen (H): 10 atoms x 0.75 moles = 7.5 atoms (since there are 10 hydrogen atoms in one molecule of caffeine).

For nitrogen (N): 4 atoms x 0.75 moles = 3 atoms (since there are 4 nitrogen atoms in one molecule of caffeine).

For oxygen (O): 2 atoms x 0.75 moles = 1.5 atoms (since there are 2 oxygen atoms in one molecule of caffeine).

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Answer:

4.30 × 10²⁰ atoms

Explanation:

You need to find out how many moles you have.  First, convert milligrams to grams.

62.5 mg × (1 g)/(1000 mg) = 0.0625 g

Next, use the molar mass to convert from grams to moles.

0.0625 g ÷ 87.62 g/mol = 7.13 × 10⁻⁴ mol

To convert from moles to atoms, you need to use Avogadro's number (6.022 × 10²³).  Avogadro's number is the number of atoms in a mole.

7.13 × 10⁻⁴ mol × 6.022 × 10²³ atoms/mol = 4.296 × 10²⁰ ≈ 4.30 × 10²⁰ atoms

You will have 4.30 × 10²⁰ atoms of strontium.

The number of Strontium atoms are 4.30 × 10²⁰ atoms

Given:

Mass of Strontium = 62.5 mg × (1 g)/(1000 mg) = 0.0625 g

Molar mass of Strontium = 87.62 g/mol

To find:

Moles of Strontium = ?

It is defined as given mass over molar mass.

\(\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}\\\\\text{Number of moles}=\frac{0.0625 g}{87.62 g/mol }\\\\\text{Number of moles}=7.13 * 10^{-4} mol\)

Avogadro's number is the number of atoms in a mole (6.022 * 10²³)

Conversion of moles into atoms:

\(7.13 × 10^{-4} mol * 6.022 * 10^{23} atoms/mol \\\\\text{ Sr atoms}= 4.296 * 10^{20} = 4.30 * 10^{20} atoms\)

Thus, Strontium atoms will be 4.30 × 10²⁰ atoms.

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To dissolve 4.7 g of AgBr, you need 22.2 g of Na₂S₂O₃.

To find the mass of Na₂S₂O₃ needed, follow these steps:

1. Calculate the moles of AgBr: 4.7 g / 187.77 g/mol (molar mass of AgBr) = 0.025 mol AgBr.
2. Use the Ksp value to determine the concentration of Ag⁺ ions: [Ag⁺] = √(Ksp) = √(3.3 x 10⁻¹³) = 1.82 x 10⁻⁷ M.
3. Calculate the moles of Ag⁺ ions: (1.82 x 10⁻⁷ M) x 1.0 L = 1.82 x 10⁻⁷ mol Ag⁺.
4. Use the stoichiometry of the reaction to find the moles of Na₂S₂O₃ needed: 1 mol Na₂S₂O₃ / 2 mol Ag⁺ = 0.5 mol Na₂S₂O₃/mol Ag⁺.
5. Calculate the moles of Na₂S₂O₃ required: 0.5 mol Na₂S₂O₃/mol Ag⁺ x 1.82 x 10⁻⁷ mol Ag⁺ = 9.1 x 10⁻⁸ mol Na₂S₂O₃.
6. Convert moles of Na₂S₂O₃ to grams: 9.1 x 10⁻⁸ mol Na₂S₂O₃ x 158.11 g/mol (molar mass of Na₂S₂O₃) = 22.2 g Na₂S₂O₃.

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Answer:

The molecular weight of CO is 28.01g/mole.

The precipitate in the reaction between MgCl2 (aq) and 2NaOH (aq) is Mg(OH)2 (s).

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Answer:

Model A

Explanation:

Model A represents an atom that is more reactive than the others represented.

Valence electrons actually determine the reactivity of elements. They also determine the properties of elements.

Elements with one valence electron are highly reactive because they need low energy to remove them. They can either gain more electrons to become stable or they share/give out their electrons.

Therefore, Model A is the correct answer because it has one valence electron and its valence electron is farther from the nucleus thereby this makes it more reactive.

Answer:

A

Explanation:

It is the most reactive because it have to gain more electrons.

Answer:

B. Free water

The order of reactivity of the nucleophiles in SN2 reactions, from most reactive to least reactive : I- > CH3O- > (CH3)3CO- > CH3O2- > H2O

The reactivity of a nucleophile in an SN2 reaction depends on the following factors:

In the case of the nucleophiles listed in your question, the order of reactivity is as follows:

It is important to note that the order of reactivity of nucleophiles in SN2 reactions can be affected by other factors, such as the solvent and the structure of the substrate.

Thus, the order of reactivity of the nucleophiles in SN2 reactions, from most reactive to least reactive : I- > CH3O- > (CH3)3CO- > CH3O2- > H2O

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Answer:Plasma is highest energy state of matter.It consists of electrons,protons and neutral particles.

Explanation:(1) Plasma has a very high electrical conductivity .

(2) The motion of electrons and ions in plasma produces it's own electric and magnetic field

(3)It is readily influenced by electric and magnetic fields .

(4)It produces it's on electromagnetic radiations.



Answer:

thermal shock

Explanation:

the temperatures inside the glass jar should have continued to increase over time. Internal stresses due to uneven heating. This is also known as “thermal shock”.

In general, the thicker the glass, the more prone it will be to breaking due to the immediate differences in temperature across the thickness of glass.

Borosilicate glass is more tolerant of this, as it has a higher elasticity than standard silicon glass.

You may also note that laboratory test tubes and flasks are made with thinner walls, and of borosilicate glass, when designated for heating.

Okay, here are the steps to calculate the pH for that acidic solution:

[H+] = 1 x 10^-4 mol/L

pH = -log([H+])

= -log(1 x 10^-4)

= -4

Therefore, the pH of that acidic solution is 4.

The answer is 4.

Let me know if you have any other questions!

Taking into account the reaction stoichiometry, the correct answer is option A. if 23.5 grams of potassium are reacted with excess water, 33.7 grams of KOH will be formed.

The balanced reaction is:

2 K + 2 H₂O → 2 KOH + H₂

By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:

K: 2 moles

H₂O: 2 moles

KOH: 2 moles

H₂: 1 mole

The molar mass of the compounds is:

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

It can be applied the following rule of three: if by reaction stoichiometry 78.2 grams of K form 112.2 grams of KOH, 23.5 grams of K form how much mass of KOH?

mass of KOH= (23.5 grams of K× 112.2 grams of KOH) ÷78.2 grams of K

mass of KOH= 33.7 grams

Finally, 33.7 grams of KOH are formed.

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Answer:

The  pressure is \(P_f = 0.93 \ atm\)

Explanation:

From the question we are told that

   The  volume of  Ne  is  \(V_N = 2.50 \ L\)

    The volume  of  CO is  \(V_C = 2.00 \ L\)

    The  pressure of  \(Ne\) is  \(P_N = 1.09 \ atm\)

      The  pressure of  CO is \(P_C = 0.773 \ atm\)

The  number of  moles of  Ne present is evaluated using the ideal gas equation as

      \(n_N = \frac{P_N * V_N}{R T}\)

=>   \(n_N = \frac{1.09 * 2.50 }{R T} = \frac{2.725}{RT}\)

The  number of  moles of  CO present is evaluated using the ideal gas equation as

      \(n_N = \frac{P_C * V_C}{R T}\)

=>   \(n_N = \frac{0.73 * 2.00 }{R T} = \frac{1.46}{RT}\)

The  total number of moles of gas present is evaluated as

        \(n_T = n_N + n_C\)

        \(n_T = \frac{2.725}{RT} + \frac{1.46}{RT}\)

      \(n_T = \frac{4.185}{RT}\)

The  total volume of gas present when valve is opened is  mathematically represented as

                \(V_T = V_N + V_C\)

    =>        \(V_T = 2.50 + 2.00 = 4.50 \ L\)

So

  From the ideal gas equation the final pressure inside the system  is mathematically represented as

         \(P_f = \frac{n_T * RT }{ V_T}\)

=>      \(P_f = \frac{[\frac{4.185}{RT} ] * RT }{ 4.50}\)

=>       \(P_f = 0.93 \ atm\)