How many Cl atoms are within a single FeCl2 formula unit? *

Answer:

false

Explanation:

It is because the pH for Hydroxide ions is 7

Answer:

True

Explanation:

Acids have a low concentration of hydroxide ions and a pH of 1-6, while bases have a high concentration of hydroxide ions and a pH of 8-14

During a chemical reaction: bonds in the reactants are broken new bonds are made in the products Energy is absorbed to break bonds. Bond-breaking is an endothermic process. Energy is released when new bonds form. Bond-making is an exothermic process.

Energy is absorbed when bonds are broken, and it is evolved when bonds are established.

Chemical bonds is defined as the creation of a chemical compound through the creation of a chemical link between two or more atoms, molecules, or ions. To form bonds, atoms exchange or swap their valence electrons. To reach a complete outer energy level, which is the most stable configuration of electrons, atoms must form chemical bonds.

Because more energy is required to break bonds than is produced when new bonds are formed, energy is absorbed in some reactions. As a result, during a reaction, many kinds of bonds may form. Energy is released as a result of the creation of bonds. Energy is absorbed when bonds are broken.

Thus, when bonds are broken, energy is absorbed, and when bonds are formed, energy is evolved.

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Considering the definition of molar mass, the correct answer is option c): the mass of 1.85 moles H₂O₂ is 62.9 grams.

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

The molar mass of a compound is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.

In this case, you know the molar mass of the elements is:

So, the molar mass of the compound H₂O₂ is calculated as:

H₂O₂= 2× 1 g/mole + 2× 16 g/mole

Solving:

H₂O₂= 34 g/mole

You can apply the following rule of three: If by definition of molar mass 1 mole of the compound contains 34 grams, 1.85 moles of the compound contains how much mass?

mass= (1.85 moles× 34 grams)÷ 1 mole

mass= 62.9 grams

Finally, the mass of 1.85 moles H₂O₂ is 62.9 grams.

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Answer:

3.1g/mL

Explanation:

density = mass/volume

= 43.3/ 13.8

= 3.1g/mL

Answer:

The volume of the gas sample at standard pressure is 819.5ml

Explanation:

Solution Given:

let volume be V and temperature be T and pressure be P.

\( V_1=250ml\)

\( V_2=?\)

\( P_{total}=735 mmhg\)

1 torr= 1 mmhg

42.2 torr=42.2 mmhg

so,

\( P_{water}=42.2mmhg\)

\( T_1=35°C=35+273=308 K\)

Now

firstly we need to find the pressure due to gas along by subtracting the vapor pressure of water.

\( P_{gas}=P_{total}-P_{water} \)

=735-42.2=692.8 mmhg

Now

By using combined gas law equation:

\(\frac{P_1*V_1}{T_1} =\frac{P_2*V_2}{T_2}\)

\(V_2=\frac{P_1*}{P_2}*\frac{T_2}{T_1} *V_1\)

\(V_2=\frac{P_gas}{P_2}*\frac{T_2}{T_1} *V_1\)

Here \(P_2 \:and\: T_2\) are standard pressure and temperature respectively.

we have

\(P_2=750mmhg \:and\: T_2=273K\)

Substituting value, we get

\(V_2=\frac{692.8}{750}*\frac{273}{308} *250\)

\(V_2= 819.51 ml\)

The average kinetic energy of the particles is reduced by a factor of (723/819)2 = 0.60, assuming the substance is an ideal gas.

The energy an object possesses as a result of its motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The relationship between kinetic energy and an object's mass and square of its velocity is direct.

When an object is moving, it has kinetic energy, which is computed using the formula KE = 1/2mv2, where m is the object's mass and v is its velocity. Calculating the amount of energy required to halt a moving object is just one practical use for the fundamental physics idea of kinetic energy.

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The Medal of Honor is the best navy decoration and highest volume.

The President of the USA The Victoria go is the holy grail for Medal of Honor creditors because there are the best in lifestyles. Bearing the inscription For valor and called a VC, this medal turned into first offered for conspicuous bravery' in 1856 and later backdated to the Crimean conflict of 1854. The outstanding service pass is the second maximum army ornament that may be provided to a member of the American military, for intense gallantry and risk of lifestyle in actual combat with an armed enemy force.

The Bronze Star Medal dates lower back to world battle II. these days, it is the fourth-maximum ranking award a provider member can obtain for a heroic and meritorious deed performed in an armed battle. For individuals who acquire the BSM, it's far a sign of their sacrifice, bravery, and honor at the same time as serving their us of a

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The can would explode if the temperature reaches 10.94°C or higher. We can use the combined gas law to solve this problem.

(P1 * V1) / (T1) = (P2 * V2) / (T2) where P1 is the initial pressure, V1 is the initial volume (which we can assume is constant for an aerosol can), T1 is the initial temperature, P2 is the final pressure (which we know is 3.30 atm), V2 is the final volume (which we can assume is constant for an aerosol can), and T2 is the final temperature (which we want to find).

First, we need to convert the initial pressure to units of atm:

P1 = 3.00 atm

Next, we can plug in the values and solve for T2:

(P1 * V1) / (T1) = (P2 * V2) / (T2)

(3.00 atm * V1) / (25°C + 273.15) = (3.30 atm * V2) / (T2 + 273.15)

Multiplying both sides by (T2 + 273.15) and dividing by 3.30 atm, we get:

(T2 + 273.15) = [(3.00 atm * V1) / (25°C + 273.15)] * [(T2 + 273.15) / (3.30 atm * V2)]

Simplifying, we get:

T2 + 273.15 = (3.00 / 3.30) * (25°C + 273.15)

T2 + 273.15 = 284.09 K

Subtracting 273.15 from both sides, we get:

T2 = 10.94°C

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The new volume of the balloon will be 484.43 L.

This is an example of Charles' law, sometimes called the temperature-volume law. It states that the volume of a gas is directly proportional to the Kelvin temperature, while pressure and amount are held constant.

The equation is V1/T1=V2/T2, where V is volume and T is temperature in Kelvins.

Known

V1=556 L

T1=30∘C+273.15=303 K

T2=-9∘C+273.15=264 K

Unknown

V2

Solution

Rearrange the equation to isolate V2. Substitute the known values into the equation and solve.

V2=V1T2/T1

V2=(556L×264K)/303K=484.43 L.

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The block’s average speed : 0.36 m/s

Distance is the length traveled by an object within a certain of time .  

Average speed = total distance/total amount of time ,

Can be formulated :

\(\tt avg.s(speed)=\dfrac{\Delta D}{\Delta t}\)

ΔD= total distance

Δt= total time

A block is pulled 0.90 m to the right in 2.5 s :

ΔD= total distance = 0.9 m

Δt= total time = 2.5 s

The block’s average speed :

\(\tt avg.s=\dfrac{0.9}{2.5}=0.36~m/s\)

Subaquatic soil can be classified as sediment or soil based on its geological properties and formation processes.

Sediment refers to any material that is transported and deposited by water, wind, ice, or gravity. Sediments can be composed of various materials, such as minerals, rocks, organic matter, and even human-made debris.

Sediments can accumulate in different environments, such as rivers, lakes, oceans, and deserts, and can be deposited in layers over time.

Subaquatic soil can be classified as sediment or soil based on its geological properties and formation processes. If it has primarily formed through sediment deposition, it is more appropriate to classify it as sediment.

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The engine displacement in cubic nanometer (nm³) is 8.785×10²⁴ nm³

1 in³ = 1.639×10²² nm³

With the above convesion scale we can obtain the displacement in nm³

1 in³ = 1.639×10²² nm³

Therefore,

536 in³ = 536 × 1.639×10²²

536 in³ = 8.785×10²⁴ nm³

Thus, the displacement in nm³ is 8.785×10²⁴ nm³

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Answer:

1.57 × 10^-4

one point five seven times ten to the power of negative four

Answer:

Explanation:

2Al(s) + 3 2 O2(g) → Al2O3(s) And given the stoichiometry ...and EXCESS dioxygen gas...we would get 6.25⋅ mol of alumina. the which represents a mass... ...6.25 ⋅ mol ×101.96 ⋅ g ⋅ mol−1 molar mass of alumina ≡ 637.25 ⋅ g.

Answer:

56.7 grams of aluminum oxide (AI²O³) are produced.Need a fast expert's response.

Answer:

true

Explanation:

Explanation:

The atomic number is equal to the number of protons in an atom's nucleus. Hydrogen's atomic number is 1 because all hydrogen atoms contain exactly one proton.

Answer:

A. Reference blank

B. Cuvettes

C. Transmittance

D. Absorbance

E. Wavelength

Explanation:

A reference blank is a sample prepared using the solvent and any other chemicals in the sample solutions, but not the absorbing substance.

A square-shaped container, typically made of quartz, designed to hold samples in a spectrophotometer is known as Cuvettes.

A measurement of the amount of light that passes through a sample or percentage of light transmitted by the sample, with the respective intensities of the incident and transmitted beams is called Transmittance.

The measurement of the amount of light taken in by a sample is known as Absorbance

The wavelength is also the distance travelled by the wave during a period of oscillation. In spectrophotometry, the unit is inversely proportional to energy and commonly measured in nanometers

The sample that is prepared using the solvent and any other chemicals in the sample solutions, but not the absorbing substance is a reference blank.

A square-shaped container, typically made of quartz, designed to hold samples in a spectrophotometer is the cuvettes.

A measurement of the amount of light that passes through a sample is transmittance.

A measurement of the amount of light that is taken in by a sample is referred to as absorbance.

A unit that is commonly used in spectrophotometry that is inversely proportional to energy and commonly measured in nanometers is the wavelength.

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Answer:

3.7 x 10^23

is the right answer

Answer:

The answer to your question is given below

Explanation:

From the question given above, the following data were obtained:

Concentration (g/mL) = 0.04 g/mL

Concentration (g/L) =?

We can convert g/mL to g/L by doing the following:

1 g/mL = 1000 g/L

Therefore,

0.04 g/mL = 0.04 g/mL × 1000 g/L / 1 g/mL

0.04 g/mL = 40 g/L

0.04 g/mL is equivalent to 40 g/L.

Thus, the concentration (g/L) is 40 g/L

Answer:

Explanation:

If a zero is found between significant digits, it is significant

K1 and K2 are related algebraically because once the values are inserted into the equilibrium equation, both equations will yield a denominator of 100.

The answer is C.less -- freeze -- less​

Solution :

It is given that a now-a-days many of the health clubs and the gyms provides steam saunas with the help of heated rocks in a container. When water is poured in to these heated rocks, steam is being produce.

This is because the energy conversion takes place in this process. The hot rocks have high temperatures and possess heat energy in them. So when cold water is poured in to the rocks, the cold water absorbs the heat energy from the rocks and is converted in to hot vapor by converting heat energy in to vapor energy or steam energy by the process of vaporization.

Answer:

See the explanations

Explanation:

In the Baeyer-Villiger reaction, we will produce an ester from a ketone (see the first reaction). In our case, the ketone is Acetophenone therefore phenyl acetate would be produced.

Now, for the mass calculation, we have to keep in mind that we have a reaction with a 1:1 ratio. So, if we have 0.02 moles of acetophenone and 0.036 moles of m-CPBA the limiting reagent would be the smallest value in this case acetophenone.

Additionally, if we have a 1:1 ratio and the limiting reagent is 0.02 moles of acetophenone we will have as product 0.02 of phenyl acetate, if we take into account the molar mass of phenyl acetate (136.05 g/mol), we can do the final calculation:

\(0.02~mol~acetophenone\frac{1~mol~phenyl acetate}{1~mol~acetophenone}\frac{136.05~g~phenyl acetate}{1~mol~phenyl acetate}=2.72~g~phenyl acetate\)

I hope it helps!

The final temperature of the water is: T_final = 45.0°C

We can use the formula for the specific heat capacity of the water to solve this problem:

q = mcΔT

First, we can calculate the initial energy of the water:

q = mcΔT

q = (10.0 g) (4.184 J/g°C) (25.0°C)

q = 1,046 J

Next, we can calculate the final temperature after absorbing 840 J:

q = mcΔT

840 J = (10.0 g) (4.184 J/g°C) (ΔT)

ΔT = 20.0°C

Therefore, the final temperature of the water is:

T_final = T_initial + ΔT

T_final = 25.0°C + 20.0°C

T_final = 45.0°C

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Answer: Your gut bacteria can affect how your food is digested, how fat is stored and whether you feel hungry or full.

Explanation: Thus, a healthy gut bacteria may be important for maintaining a healthy weight. High-fiber foods like whole grains, fruits, vegetables, nuts and seeds can all promote healthy gut bacteria.

Approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M.

To determine the mass of glucose (C6H12O6) required to prepare a 0.215 M solution in 5000 mL, we need to use the formula:

Molarity (M) = moles of solute / volume of solution (in liters)

First, let's convert the volume of the solution from milliliters (mL) to liters (L):

5000 mL = 5000/1000 = 5 L

Now, we can rearrange the formula to solve for moles of solute:

moles of solute = Molarity (M) x volume of solution (L)

moles of solute = 0.215 M x 5 Lmoles of solute = 1.075 mol

Since glucose (C6H12O6) has a molar mass of approximately 180.16 g/mol, we can calculate the mass of glucose using the equation:

mass of solute = moles of solute x molar mass of solute

mass of glucose = 1.075 mol x 180.16 g/mol

mass of glucose = 194.0 g (rounded to three significant figures)

Therefore, approximately 194.0 grams of glucose (C6H12O6) would be required to prepare a 5000 mL solution with a concentration of 0.215 M. It's important to note that the molar mass of glucose used in this calculation may vary slightly depending on the level of precision required.

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Answer:

c. 2 OH⁻(aq) + 2 H⁺(aq) ⇒ 2 H₂O(l)

Explanation:

Step 1: Write the molecular equation

The molecular equation includes all the molecular species.

H₂A(aq) + 2 NaOH(aq) ⇒ Na₂A(aq) + 2 H₂O(l)

Step 2: Write the complete ionic equation

The complete ionic equation includes all the ions and the molecular species.

2 H⁺(aq) + A²⁻(aq) + 2 Na⁺(aq) + 2 OH⁻(aq) ⇒ 2 Na⁺(aq) + A²⁻(aq) + 2 H₂O(l)

Step 3: Write the net ionic equation

The net ionic equation includes only the ions that participate in the reaction and the molecular species.

2 OH⁻(aq) + 2 H⁺(aq) ⇒ 2 H₂O(l)

Answer:

hola comoe stas

Explanation:

gracias x los puntos