Hello, Who ever answers gets brainliest!

Answer:

a. The gas with the highest average molecular speed is the gas option 3.

b, The gas that has the lowest average molecular speed is the gas option 1.

c. The gas with average molecular speed between the highest and the lowest is the gas sample, option 4

Explanation:

From the kinetic theory of gases we have;

[tex]v_{rms} = \sqrt{\dfrac{3\cdot R\cdot T}{m} }[/tex]

Where;

[tex]v_{rms}[/tex] = The root mean square velocity of the gas

T = Temperature of gas in Kelvin

m = Mass of atom or molecule in kilograms

R = The universal gas constant

Therefore, [tex]v_{rms}[/tex] ∝ T and [tex]v_{rms}[/tex] ∝ 1/m

a. Therefore, the gas with the highest average molecular speed has the highest temperature, 'T', and the lowest mass, 'm', therefore, we have;

The gas with the highest average molecular speed is the gas option 3. with only 0.128 moles of Ne in 5.69 L container at a temperature of 426 K

b. The gas with the lowest average molecular speed has the lowest temperature, 'T', and the highest mass, 'm', therefore, we have;

The gas with the lowest average molecular speed is the gas option 1. with only 0.564 moles of Ne in 5.33 L container at a temperature of 308 K

c. The gas with an average molecular speed between the highest and the lowest is the gas with intermediate temperature and mass within the given gas samples

Therefore, the gas with the average molecular speed between the highest and lowest is the gas option 4. with 0.322 moles of Ne in 4.00 L container at a temperature of 398 K

Answer:

S (Sulfur)

Explanation:

Electronegativity increases as you go up and right on the periodic table, excluding the noble gases on the rightmost column because they have zero electronegativity. S is the farthest right out of all the elements listed in the question excluding Ne.

Answer:

18,300 J

Explanation:

In order to be able to answer this question, you must know the value of water's enthalpy of fusion,  

, which is listed as

ΔH↔ = 18,300J

Now, a substance's enthalpy of fusion tells you how much heat is needed in order to convert   of said substance from solid at its melting point to liquid at its melting point.

In water's case, an enthalpy of fusion equal to  

333.55 J g

333.55 J

of heat.

Your ice cube has a mass of  

55.0 g

Answer:

Cementation

Erosion

Explanation:

Cementation refers to hardening and welding of those sediments which are formed from preexisting rock fragments as a result of the precipitation of mineral matter in the spaces between the pore. The last stage in the formation of a sedimentary rock is Cementation.

Erosion is the geological process in which soil, rock, or dissolved material are worn away and transported from one location to another location by natural forces such as wind or water.

The two parts of sedimentary rock formation which include the breakdown and carrying away of existing rock are cementation and erosion.

Answer: The answer is A: Cementation and Erosion

Explanation: Hope this helps! happy new year

Answer:

kay, so u didn't gave the list but I guess I'm right...bcz of some words you wrote below..

yeah,

so your answer is GERMINATION

2 plus 2 is 4 because it just doo

Answer:

The purpose of this experiment was to verify Hess’s law associated with three reactions. Our experiment confirmed it by combining the enthalpy changes of two reactions to equal of that another single reaction (Reaction 2 in our case). Styrofoam cup was used as a calorimeter to measure the change in temperature, which is a necessary variable for further calculations. We discovered that sum of enthalpy changes for reactions one and three equaled the enthalpy change in reaction two. This experiment was possible because if one of the reactions is the same as the combination of other two, the heat of the reaction of the single reaction should be equal to the heat of other two reaction combined.

Explanation: when you see the reactions that the Hess's law to find the enthalpy, which we did from this lab.

Answer:

The data table is attached and it is the first one but I am not sure about the second one so hopefully someone figured it out

Explanation:

Ed ge 2021

Answer:

Average atomic mass = 19.9 amu

Explanation:

Isotopes can be defined as two or more forms of a chemical element that are made up of equal numbers of protons and electrons but different numbers of neutrons.

Generally, the isotopes of a chemical element have the same chemical properties because of their atomic number but different physical properties due to their atomic weight (mass number).

Given the following data;

Relative abundance of Z-19 = 55%

Relative abundance of Z-21 = 45%

Atomic mass of Z-19 = 19 amu

Atomic mass of Z-21 = 21 amu

To find the average atomic mass;

Average atomic mass = 19 * (55/100) + 21 * (45/100)

Average atomic mass = 19*0.55 + 21*0.45

Average atomic mass = 10.45 + 9.45

Average atomic mass = 19.9 amu

Therefore, the average atomic mass for element Z is 19.9 amu.

Iron (II) chloride and hydrogen gas

Chemical name:

FeCl2 (aq) + H2 (g)

Answer:

pH = 9.56

Explanation:

Let's assume we have 1 liter of the solution. Then we would have 3.11 mg of Ba(OH)₂.

We convert 3.11 mg of Ba(OH)₂ into moles, using its molar mass:

There are two OH⁻ moles per Ba(OH)₂ mol. Meaning there's (2*1.82x10⁻⁵) 3.63x10⁻⁵ moles of OH⁻.

As the volume is 1 L, the molar concentration of OH⁻, [OH⁻] is 3.63x10⁻⁵ M.

With the above information in mind we calculate the pOH of the solution:

Finally we calculate the pH:

Answer:

hardness im sure

Explanation:

Answer:

4.2 Liters (2 sig-figs)

Explanation:

Apply Boyles Law ... P₁V₁ = P₂V₂

P₁ = 712 Torr      P₂ = 3560 Torr

V₁ = 21.0L           V₂ = ?

P₁V₁ = P₂V₂ => V₂ = P₁V₁/P₂ = (712Torr)(21.0L)/(3560Torr) = 4.2 Liters (2 sig-figs)

Answer:

c. 2s2 2p5

Explanation:

2s2 2p5 has 7 valence electrons and only needs one electron to complete the octet.  This element will be the most electronegative.

Answer:

3.94 L

Explanation:

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

Mass of O₂ = 5.62 g

Volume of O₂ =?

Next, we shall determine the number of mole present in 5.62 g of O₂. This can be obtained as follow:

Mass of O₂ = 5.62 g

Molar mass of O₂ = 2 × 16 = 32 g/mol

Mole of O₂ =?

Mole = mass / molar mass

Mole of O₂ = 5.62 / 32

Mole of O₂ = 0.176 mole

Finally, we shall determine the volume of 5.62 g (i.e 0.176 mole) of O₂ at STP. This can be obtained as follow:

1 mole of O₂ occupied 22.4 L at STP.

Therefore, 0.176 mole of O₂ will occupy = 0.176 × 22.4 = 3.94 L at STP.

Thus 5.62 g (i.e 0.176 mole) of O₂ occupied 3.94 L at STP

Answer:ionic

Explanation:

Answer:

hay  4,240 gr

Explanation:

Explanation:

The equation of the reaction is given as;

Be + 2HCl → BeCl2 + H2

What is the mass of beryllium required to produce 25.0g of beryllium chloride?

1 mol of Be produces 1 mol of BeCl2

Converting to mass;

Mass = Molar mass  *  Number of moles

9.01g of Be produces 79.92g of BeCl2

xg of Be produces 25g of BeCl2

Solving for x;

x = 25 * 9.01 / 79.92

x = 2.82 g

What is the mass of hydrochloric acid required to produce 25.0g of beryllium chloride? g

Converting 25.0g of beryllium chloride to moles;

Number of moles = Mass / Molar mass

Number of moles = 25 / 79.92 = 0.3128 mol

2 mol of HCl produces 1 mol of BeCl2

x mol of HCl would produce 0.3128 mol of BeCl2

solving for x;

x = 0.3128 * 2 = 0.6256 mol

Converting to mass;

Mass = 0.6256 * 36.5 = 22.83 g

What is the mass of hydrogen gas produced when 25.0g of beryllium chloride is also produced? g

25g of BeCl2 = 0.3128 mol of BeCl2

From the equation;

1 mol of H2 is produced alongside 1 mol of BeCl2

This means;

0.3128 mol of H2 would also be produced alongside 0.3128 mol of BeCl2

Mass = Number of moles * Molar mass

Mass = 0.3128mol * 2.0159 g/mol = 0.6306 g

Answer:

E sound

Explanation:

Answer:

5 grams remain

Explanation:

A = A₀exp(-k·t) 80g·exp(-0.00238yr⁻¹)(1165yrs) = 80g x 0.063 = 5 grams remain

1100 mmHg

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Gas Laws

Stoichiometry

Step 1: Define

[Given] 1.5 atm

[Solve] mmHg

Step 2: Identify Conversions

1 atm = 760 mmHg

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

1140 mmHg ≈ 1100 mmHg

Answer:

The answer is decline and apparent

Explanation:

I took the test and got it right

Answer:

Big Chill

Explanation:

Answer:

it's big chill or big freeze

Answer:

[tex]Q=50,849.25J\\\\Q=12,153.3cal[/tex]

Explanation:

Hello!

In this case, given the mass, temperature change and specific heat, it is possible to compute the required heat in joules as shown below:

[tex]Q=mC(T_2-T_1)\\\\Q=75.0g*0.449\frac{J}{g\°C}(1535\°C-25\°C)\\\\Q=50,849.25J[/tex]

Now, since 1 cal =4.184 J, this result in calories is:

[tex]Q=50,849.25J*\frac{1cal}{4.184J}\\\\Q=12,153.3cal[/tex]

Best regards!