Draw the Lewis structure for XeCl2 and answer the following questions.
How many valence electrons are present in this compound?
How many bonding electrons are present in this compound?
How many lone pair (non-bonding) electrons are present in this compound?

Key differences between Mass and Weight

The weight may vary, but the mass is constant.

The mass is measured in kilograms (kg), while the weight is measured in newtons (N).

Mass refers to the amount of matter an object has, but the weight refers to the force of gravity acting on an object.

Answer:

C. Academic English

Explanation:

just a side note, it'd be alot easier if you put the answers like this:

A. Urban English

B. Standard English, and et

Explanation:

D_____________________₩_

Answer:

2.4 x 1027 g

Explanation:

the mass of 1 mole of brick is 2.4 x 1027 g.

Answer:

oceans

Explanation:

Answer:9.361

Explanation:

Answer:

Protons, neutrons, and electrons

Explanation:

protons- a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.

neutrons- a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.

electrons- a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.

The machine exerts a force of 9 newtons on the baseball to accelerate it from 0 m/s to 30 m/s in 0.5 seconds.

To calculate the force exerted by the machine on the baseball, we can use Newton's second law of motion, which states that force (F) is equal to the product of mass (m) and acceleration (a).

In this case, the acceleration can be determined using the formula a = (v - u) / t, where v is the final velocity, u is the initial velocity, and t is the time taken for the acceleration.

Given:

Mass of the baseball (m) = 0.15 kg

Initial velocity (u) = 0 m/s (as the baseball starts from rest)

Final velocity (v) = 30 m/s

Time (t) = 0.5 s

First, let's calculate the acceleration:

a = (v - u) / t

a = (30 m/s - 0 m/s) / 0.5 s

a = 60 m/s^2

Now, we can use the calculated acceleration and the given mass to determine the force:

F = m * a

F = 0.15 kg * 60 m/s^2

F = 9 N

The machine exerts a force of 9 newtons on the baseball. This force is calculated using Newton's second law of motion, which states that force is equal to mass multiplied by acceleration.

By determining the acceleration of the baseball using the formula a = (v - u) / t and substituting the given values, we find that the acceleration is 60 m/s^2. Multiplying the mass of the baseball (0.15 kg) by the acceleration gives the force exerted by the machine as 9 newtons.

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Answer:

NaCl: 184g

MgCl₂: 6.60g

Na₂SO₄: 9.26g

CaCl₂: 1.28g

KCl: 0.70g

NaHCO₃: 0.13g

Explanation:

To convert these concentrations to masses we need to convert molarity to moles and moles to grams using molar mass of each salt:

[CaCl₂] = [Ca²⁺] = 0.0115M

[HCO₃⁻] = [NaHCO₃] = 0.0015M

[SO₄²⁻] = [Na₂SO₄] = 0.0652M

[Mg²⁺] = [MgCl₂] = 0.0693M

[K⁺] = [KCl] = 0.0094M

And using the concentration of Cl⁻:

[Cl⁻] = [NaCl] + 2[MgCl₂] + 2[CaCl₂] + [KCl]

[3.32] = [NaCl] + 2[0.0693] + 2[0.0115] + [0.0094]

[NaCl] = 3.149M

The masses you need are:

NaCl (Molar mass: 58.44g/mol):

3.149mol/L * 1L *  (58.44g/mol) =

MgCl₂ (Molar mass: 95.211g/mol):

0.0693mol/L * 1L *  (95.211g/mol) =

Na₂SO₄ (Molar mass: 142.04g/mol):

0.0652mol/L * 1L *  (142.04g/mol) =

CaCl₂ (Molar mass: 110.98g/mol):

0.0115mol/L * 1L *  (110.98g/mol) =

KCl (Molar mass: 74.55g/mol):

0.0094mol/L * 1L *  (74.55g/mol) =

NaHCO₃ (Molar mass: 84g/mol):

0.0015mol/L * 1L *  (84g/mol) =

D because you can easily make mistakes but keep goin to get it right.

Answer:

The correct answer is D.

Explanation:

Water can evaporate, and if it does, the density decreases

Answer:

D

Explanation:

H2S is covalent

NH3 is covalent

I2 is covalent

KI is ionic

CCl4 is covalent

Answer:

H2O i think.................................

Answer: the rotation of Earth on its axis

Explanation: I just did the quiz in my schoolwork right now and got it right so it is correct!

Have a wonderful day!

Answer:

the rotation of earth on its axis

Explanation:

ya gurl took da test

Answer:

The pH value is 3.23

Explanation:

Given that,

[tex][H_{3}O^{+}]=5.79\times10^{-4}\ M[/tex]

We know that,

pH is defined as the negative log10 of the hydrogen ion activity,

We need to calculate the pH

Using formula of pH

[tex]pH=-log_{10}[H_{3}O^{+}][/tex]

Put the value of [tex][H_{3}O^{+}][/tex]

[tex]pH=-log_{10}(5.79\times10^{-4})[/tex]

[tex]pH=3.23[/tex]

Hence, The pH value is 3.23

Answer:

the second and fourth one

Explanation:

i just know lol

The emission spectra of the two elements in the gas is second and third one.

Emission spectra refer to the distinct patterns of light emitted by a substance when it is energized or excited. When atoms or molecules absorb energy, typically in the form of heat or light, their electrons move to higher energy levels. As these excited electrons return to their lower energy levels, they release the excess energy in the form of light. The emitted light consists of a series of discrete wavelengths or colors, which can be separated and observed as a spectrum.

Emission spectra are unique to each element or compound and can be used to identify and characterize them. They provide information about the energy transitions occurring within the atoms or molecules and can be measured using various techniques such as spectroscopy. The emitted wavelengths correspond to specific energy differences between electron energy levels, and the resulting spectrum can appear as a series of distinct lines or bands depending on the nature of the emission process.

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Answer:

Koh of 60 and a half

Explanation:

Answer:

Temperature and Boiling

When boiling occurs, the more energetic molecules change to a gas, spread out, and form bubbles. These rise to the surface and enter the atmosphere. It requires energy to change from a liquid to a gas (see enthalpy of vaporization).

Answer:

a vanilla milkshake

Explanation:

a homogeneous mixture is a mixture that is equal in all parts. a tossed salad may have some parts with more lettuce. a chocolate chip cookie might have more chocolate chips in one area. and chunky peanut butter is really chunky.

hope this helps<3

Answer: 0.01645

Explanation:to long tosovles.

A Brainliest please

Good luck .

Answer:

ok

Explanation:

Answer:

B

Explanation:

Sorry if wrong, brainliest if right please

Answer:

1.33 × 10⁻³ m³

Explanation:

Step 1: Given data

Side of the cube (d): 11.0 cm

Step 2: Calculate the volume of the cube (V)

We will use the following expression.

V = d³

V = (11.0 cm)³

V = 1.33 × 10³ cm³

Step 3: Convert "V" to m³

We will use the conversion factor 1 m³ = 10⁶ cm³.

1.33 × 10³ cm³ × (1 m³ / 10⁶ cm³) = 1.33 × 10⁻³ m³

The balanced molecular equation for the reaction of magnesium nitrate, Mg(NO₃)₂ and sodium phosphate, Na₃PO₄ is:

3Mg(NO₃)₂(aq) + 2Na₃PO₄(aq) → 6NaNO₃(aq) + Mg₃(PO₄)₂(s)

The balanced molecular equation for the reaction of magnesium nitrate, Mg(NO₃)₂ and sodium phosphate, Na₃PO₄ can be written as illustrated below:

Mg(NO₃)₂(aq) + Na₃PO₄(aq) → NaNO₃(aq) + Mg₃(PO₄)₂(s)

There is 1 atom of Mg on the left side and 3 atoms on the right. It can be balanced by writing 3 before Mg(NO₃)₂ as shown below:

3Mg(NO₃)₂(aq) + Na₃PO₄(aq) → NaNO₃(aq) + Mg₃(PO₄)₂(s)

There is 1 atom of P on the left side and 2 atoms on the right. It can be balanced by writing 2 before Na₃PO₄ as shown below:

3Mg(NO₃)₂(aq)  + 2Na₃PO₄(aq) → NaNO₃(aq) + Mg₃(PO₄)₂(s)

There are a total of 6 atom of Na on the left side and 1 atom on the right. It can be balanced by writing 6 before NaNO₃ as shown below:

3Mg(NO₃)₂(aq) + 2Na₃PO₄(aq) → 6NaNO₃(aq) + Mg₃(PO₄)₂(s)

Now, the equation is balanced.

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To get the net Ionic equation we must get rid of spectator ions, I.E. the ions that repeat on either side of the equation.

So...!

[tex]Ni_{2}[/tex][tex](aq)^{+}[/tex] + [tex]SO_{4}(aq)^2-[/tex] + [tex]2Na(aq)^+[/tex] + [tex]S_{2} (aq)^{2} -[/tex] → [tex]2NiS(s)[/tex] + [tex]2Na(aq)^{+}[/tex] + [tex]SO_{4}(aq)^{2-}[/tex]

This becomes the following net ionic.

[tex]Ni_{2}[/tex][tex](aq)^{+}[/tex] + [tex]S_{2} (aq)^{2} -[/tex] → [tex]2NiS(s)[/tex]

[tex]NH_3+HNO_3-> NH_4NO_3[/tex]

1 mole of nitric acid produce 1 mole of ammonium nitrate.

moles in 5000 kg of ammonium nitrate :

[tex]n=\dfrac{5000\times 1000}{80}\\\\n=62500\ moles[/tex] ( molecular mass of ammonium nitrate is 80 gm/mol )

So, number of moles of nitric acid required are also 62500 moles.

Mass of 62500 moles of nitric acid :

[tex]mass = 62500\times 63 \\\\mass = 3937500\ gram\\\\mass = 393.75\ kg[/tex]

Hence, this is the required solution.

Answer:

a) Does not describe an element

b) Not possible to tell

c) Describes an element

d) Does not describe an element

e) Describes an element

f) Describes an element

Explanation:

Answer:

58.94 mL

Explanation:

V1 = 48.3 mL             V2 = v mL

T1 = 22 degree celsius OR 295 k         T2 = 87 degree celsius OR 360 k

We will use the gas equation:

PV = nRT

Since the Pressure (p) , number of moles (n) and the universal gas constant(R) are all constants in this given scenario,

we can say that

V / T = k , (where k is a constant)

Since this is the first case,

V1 / T1 = k --------------------(1)

For case 2:

Since we have the same constants, the equation will be the same

V / T = k (where k is the same constant from before)

V2 / T2 = k (Since this is the second case) ------------------(2)

From (1) and (2):

V1 / T1 = V2 / T2

Now, replacing the variables with the given values

48.3 / 295 = v / 360

v = 48.3*360 / 295

v = 58.94 mL

Therefore, the final volume of the gas is 58.94 mL

The volume of the sample at the final temperature is 58.94mL

CHARLE'S LAW EQUATION:

V1/T1 = V2/T2

Where;

According to this question,

48.3/295 = V2/360

295 × V2 = 48.3 × 360

295V2 = 17388

V2 = 17388 ÷ 295

V2 = 58.94mL

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Systems can exist in three ways as open systems, closed systems, and isolated systems. The main difference between open and closed system is that in an open system, matter can be exchanged with the surrounding whereas, in a closed system, matter cannot be exchanged with the surrounding.

btw why not just look it up on google? btw btw brainliest plz