What is the electric force acting between two charges of 0.0042 C and -0.0050 C that are 0.0030 m apart?
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Answer:

Yes, it is balanced because the number of atoms of each element was same for both reactant side and product side.

Explanation:

Atoms of elements combine with one another to form compounds in a process called chemical reactions. In this case, atoms of Aluminum (Al) combines with atoms of Oxygen (O) to form Aluminum oxide (Al2O3).

However, for a chemical reaction to obey the law of conservation of mass, it needs to be BALANCED. Being balanced, for a chemical reaction, means the number of atoms of each element on the reactant side must equal the ones on the product side. To do this, coefficients are used at the back of each elements.

The original equation looks like:

AI + O2 → AI2O3

To make this balanced, coefficients 4 and 3 were used at the back of Al and O2 respectively while coefficient 2 was used behind Al2O3 as follows:

4AI+3O2 → 2AI2O3

Hence, the equation provided in this question is already balanced because the number of atoms of each element was same for both reactant side and product side.

Answer:

Explanation:

The new volume can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new volume

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

From the question we have

[tex]V_2 = \frac{5 \times 760}{380} = \frac{3800}{380} = \frac{380}{38} \\ [/tex]

We have the final answer as

Hope this helps you

By applying Boyle's law, the final volume of this balloon is equal to 10,000 mL.

Given the following data:

Initial volume = 5.0 L.

Final pressure = 380 torr.

Initial pressure = 760 torr.

In order to determine the final volume of this balloon, we would apply Boyle's law.

Mathematically, Boyle's law is given by this formula:

PV = k

P₁V₁ = P₂V₂

Where:

Making V₂ the subject of formula, we have:

V₂ = (P₁V₁)/P₂

Substituting the given parameters into the formula, we have;

V₂ = (760 × 5.0)/380

V₂ = 3800/380

V₂ = 10 L

In milliliters, we have:

1 L = 1000 mL

10 L = X mL

X = 1000 × 10

V₂ = 10,000 mL.

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Answer:

C : Television

Explanation:

We should click on button from where the wire gets connected to the tv and operate. TV needs electric conductor for the flow of current .

Answer:

it is a point at which a liquid Start's to evaporate

Explanation:

the point at which a liquid turns to gass

Answer:

4

Explanation:

oxidation number resolved 4

The oxidation state of an element is calculated by subtracting and the total sum of oxidation states of all the individual atom (excluding the one that has to be calculated) from total charge on the molecule. Therefore, the oxidation state of phosphorous in H[tex]_2[/tex]PO[tex]_2[/tex]⁻ is  +1.

Oxidation state of an element is a number that is assigned to an element in a molecule that represents the number of electron gained or lost during the formation of that molecule or compound.

P[tex]_4[/tex]  [tex]\rightarrow[/tex] H[tex]_2[/tex]PO[tex]_2[/tex]⁻

Oxidation number of P=0

Oxidation number of P in H[tex]_2[/tex]PO[tex]_2[/tex]⁻

(+1)×2+ Oxidation number of P + (-2)2 = -1

2 + Oxidation number of P -4 = -1

Oxidation number of P= +1

Therefore, the oxidation state of phosphorous in H[tex]_2[/tex]PO[tex]_2[/tex]⁻ is  +1. The oxidation state of phosphorous in P[tex]_4[/tex] is 0.

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Answer:

it will be 4M because molarity = no.of mole/volume

The molarity of the solution is 4 M.

The moles of a solute per liter of a solution is known as molarity, which is also defined as molar concentration of a solution.

Molarity can be calculated by using the following formula,

[tex]Molarity\;\\=\;\frac{Moles\; of\; the\; solute}{volume\; of\; the\; solution}\\\\= \frac{8\; mol}{ 2\;L} \\=\;4 \;mol/L\\=\;4\;M[/tex]

Hence the molarity of the solution comes out to be 4 M.

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Explanation:

Periods and groups describes the arrangement of elements on the periodic table using the atomic number of each of the given elements.

Elements in the same period have the same number of energy levels or electronic shell.

The period of an element is an indicator of the energy levels in an atom. The groups precisely tells us the number of valence electrons in the atom.

Answer:

c. Substance

Explanation:

A composition variable is an intensive property that indicates the relative amount of a particular species or substance in a phase.

Answer:

is b the anwer is b

Explanation:

because mixture is a composition variable

Answer:

Prefixes

Explanation:

The number of atoms of certain elements determines the prefix used.

Explanation:

Water the essential constituent of protoplasm of living cells because it is directly involved in countless biochemical reactions like photosynthesis and respiration without it cells couldn't move waste and by-products taking nutrients perform intracellular Transportation functioning and signaling

Answer:6969?

Explanation:

Answer:

magnesium has a greater charge, there will be greater attraction between delocalised electrons and the positively charged ion.

Explanation:

I did this once and got it right I hope you get it right too

Answer:

D. Ethane molecules have no hydrogen bonds and need less energy to separate.

Explanation:

Edge2020

Have a great day y'all :)

Based on the structural formulas, the compound that is more soluble in water and best helps to explain is Propanol, because its molecules can form hydrogen bonds with water molecules but those of ethane cannot. Therefore, option D is correct.

A chemical formula is a notation used by chemists to represent the number and kind of atoms present in a molecule. A written chemical formula is a straightforward illustration of an actual, three-dimensional molecule.

There are three main types of chemical formulas: empirical, molecular and structural.

Chemical bonds connecting the atoms of a molecule are located in structural formulae. A structural formula is made up of symbols for the atoms joined by brief lines that stand in for chemical bonds.

Propanol is the substance that is more soluble in water and better aids in explanation based on structural formulae, as opposed to ethane, whose molecules are unable to establish hydrogen bonds with water molecules.

Thus, option D is correct.

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Answer:

V₂ = 0.656 L

Explanation:

Given data:

Initial volume = 3.5 L

Initial pressure = 2.5 KPa

Final volume = ?

Final pressure = 100 mmHg (100/7.501=13.33 KPa)

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

2.5 KPa × 3.5 L = 13.33 KPa × V₂

V₂ = 8.75 KPa. L/13.33 KPa

V₂ = 0.656 L

Answer:

See explanation

Explanation:

(a) The handspan is the distance between the tip of the thumb and tip of the little finger when the hand is fully stretched.

b) It is impossible for them to obtain an accurate result by the use of a handspan because it doesn't use any standard unit for measurement. It is entirely subjective and highly prone to human errors.

c) Anupam  is quite intelligent and active

a) A handspan refers to the actual distance between the tip of the thumb

and tip of the little or last finger when the hand is fully stretched. It is

sometimes used in taking measurements of an object.

b) Anupam ask both of them to use measuring tape because the use of

handspan in taking measurement  because:

c) Cubit can't be used as a standard unit of length because it varies in

individuals and is associated with the different heights present.

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Answer:gamma rays

Explanation: your welcome

Answer:

During photosynthesis SOLAR enerrgy is transformed into CHEMICAL energy.

Explanation:

In nutrition, green plants manufactures their own food which they use for both energy and growth. This is called an autotrophic mode of nutrition.

Therefore, photosynthesis is an autotrophic nutrition in which plant can build sugar by taking carbon dioxide from air and water from the soil. For the synthesis of sugar like glucose, carbon dioxide provides carbon

and oxygen whereas water molecules provide hydrogen. The plant builds sugar molecules from these simple compounds. Enzymes needed for this purpose are present in the cells and energy is trapped by chlorophyll from sunlight. This process is summarised in the equation below:

Sunlight (solar)

6CO2 + 6H2O--------------------> C6H12O6 + 6O2

From the equation, Carbon dioxide, water and sunlight (SOLAR energy) is the raw materials needed to produce Glucose and oxygen (CHEMICAL energy) as by products.

Answer: Near the Protons. The electron structure of bromine is illustrated above. In chemical reactions, how does the valence configuration of Bromine tend to change? ... It loses one electron.

Explanation:

btw i found that on google lol

Answer:

90.71 KJ

Explanation:

From the reaction equation, lead is the cathode while copper was the anode.

Hence;

E°anode = +0.34V

E°cathode = -0.13 V

E°cell =E°cathode - E°anode

E°cell = -0.13 V - 0.34V

E°cell = -0.47 V

But;

ΔG° = -nFE°cell

n= number of electrons transferred = 2

F = Faraday's constant = 96500 C

E°cell = -0.47 V

ΔG° = -(2 * 96500 * (-0.47))

ΔG° = 90,710 J or 90.71 KJ

The standard Gibbs free energy for the reaction

Pb²⁺(aq) + Cu(s) → Pb(s) + Cu²⁺(aq) is 89.3 kJ/mol.

Let's consider the following redox reaction.

Pb²⁺(aq) + Cu(s) → Pb(s) + Cu²⁺(aq)

We can identify both half-reactions.

Reduction (Cathode): Pb²⁺(aq) + 2 e⁻ → Pb(s)    E°red = -0.126 V

Oxidation (Anode): Cu(s) → Cu²⁺(aq) + 2 e⁻       E°red = +0.337 V

We can calculate the standard potential of the cell (E°cell) using the following expression.

E°cell = E°red,cathode - E°red,anode = -0.126 V - 0.337 V = -0.463 V

The standard Gibbs free energy (ΔG°) is a way to measure the spontaneity of a reaction. We can calculate it using the following expression.

ΔG° = − n × F × E°cell =

ΔG° = − 2 mol × (96,485 J/V.mol) × (-0.463 V) × (1 kJ/1000 J) = 89.3 kJ/mol

where,

Since ΔG° > 0, the reaction is not spontaneous.

The standard Gibbs free energy for the reaction

Pb²⁺(aq) + Cu(s) → Pb(s) + Cu²⁺(aq) is 89.3 kJ/mol.

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Answer:

The earth circling the sun

Answer:

V₂ = 1223.2 mL  

Explanation:

Given data:

Pressure of gas = 820.4 mmHg

Initial volume of gas = 900.0 mL

Initial temperature = 25.0°C (25+273=298K)

Final temperature = 132.0°C (132.0 +273 = 405 K)

Final volume = ?

Solution:

Solution:

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 900.0 mL × 405 K / 298 k

V₂ = 364500 mL.K / 298 K

V₂ = 1223.2 mL  

*sorry I can't give a full explanation.*

g = 9.8 m/s²

w = m*g

Weight of cat: 55 N = m*9.8

m = 5.61 kg

Weight of dog: 110 N = m*9.8

m = 11.22 kg

There is gravitational potential energy (GPE) acting on the cat since it's at the very top.

GPE of cat = m*g*h = 5.61*9.8*2 = 109.96 J

GPE of dog = m*g*h = 11.22*9.8*0 = 0 J (it's 0 m height because it's on the floor instead of in the tree)

But, if the dog was also 2 m up in the tree, its GPE would be 219.91 J.

As you can see, it's GRAVITATIONAL potential energy is bigger than the cat because it weighs more. Generally, if you were just trying to find the force which is w = m*g (since weight is a force), you would see that the bigger the mass, the bigger the force, and gravity stays the same.

Hope this helped

Answer:

True

Explanation:

Hope this isnt too late

Answer:

convection

Explanation:

hope it's useful to you

Explanation:

aluminium oxide had the chemical formula Al2O3

The name of ionic compound Al₂O₃ is aluminium oxide.

The naming of ionic compounds involves using the names of the constituent ions to form the compound's name. The name of the cation (positively charged ion) comes first, followed by the name of the anion (negatively charged ion).

Here are the general steps to name an ionic compound:

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