How Does A Conductivity Apparatus Test Whether A Solution Has Ionic Or Covalent Substance In It (2023)

Answer:

Here's what I get

Explanation:

Ionic solids dissociate in water to form hydrated ions.

(a) FeCl₃

FeCl₃(s) ⟶ Fe³⁺(aq) + 3Cl⁻(aq)

(b) K₃PO₄

K₃PO₄(s) ⟶ 3K⁺(aq) + PO₄³⁻(aq)

Answer:

(NH₄)₂(SO₄)+H₂O⇒(NH₄)₂O+H₂(SO₄)

Explanation:

(NH₄)⁺(SO₄)²⁻+H₂O⇒(NH₄)⁺O²⁻+H₂(SO₄)²⁻

(NH₄)₂(SO₄)+H₂O⇒(NH₄)₂O+H₂(SO₄)

Answer:

Explanation:

We know we will need an equation with masses and molar masses, so let’s gather all the information in one place.

M_r: 261.34 233.39

Ba(NO₃)₂ + Na₂SO₄ ⟶ BaSO₄ + 2NaNO₃

m/g: 75.00

1. Moles of Ba(NO₃)₂

2. Moles of BaSO₄

The molar ratio is (1 mol BaSO₄/1 mol Ba(NO₃)₂

3. Mass of BaSO₄

Answer:

68.6 %; 72.1 %

Explanation:

The overall percentage yield for a multi-step synthesis is the product of the percentage yields for each individual step.

For the three-step synthesis

Overall yield = 0.872 × 0.911 × 0.863 = 0.686 =68.6 %

For the two-step synthesis,

Overall yield = 0.855 × 0.843 = 0.720 = 72.1 %

Robust scientific knowledge is one that is frequently re-examined.

We can define as scientific knowledge all information generated through a rigorous methodology of data collection, observations and experiments, regardless of the scientists' personal beliefs, but through a series of meticulous steps, the objective of scientific knowledge is to find a solution to a problem in a particular subject.

Robust scientific knowledge is one that is frequently re-examined, as science is not exact, it has a provisional character that is subject to change or replacement based on the emergence of new evidence or data referring to a topic.

Accurate scientific knowledge actively contributes to social and technological development, by proposing the institution of critical thinking, transformation and human evolution through the development of knowledge.

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Answer:

C) HF, because it has the strongest intermolecular force

Explanation:

The electronegativity difference ΔEN between H and F is so high that HF has especially high dipole-dipole forces, which we call hydrogen bonds. They are the strongest intermolecular forces, and they are responsible for the high boiling point of HF.

A) is wrong. HI has a higher mass and more electrons than HBr.

B) is wrong. There is no hydrogen bonding in HCl.

D) is wrong. There are no ion-dipole forces in HI.

Answer:

C

Explanation:

Answer:

Explanation:

The formula relating the mass m of a sample and the heat q to vaporize it is

q = mL, where L is the latent heat of vaporization.

Component of the solution as a solvent or a solute is:

• Water is a solvent
• Caffeine is a solute
• plant pigments are a solute

what are solvent and instance?

Solvent Examples. commonplace examples of solvents consist of water, ethanol, methanol, and acetone. The term 'solvent' may be defined as a substance that has the capacity to dissolve a given solute to form a solution with it.

what is a solute instance?

A substance this is dissolved in an answer is called a solute. In fluid answers, the amount of solvent gift is extra than the amount of solute. One fine instance of solute in our everyday interest is salt and water. Salt dissolves in water and consequently, salt is the solute.

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Answer:

Water is a solvent, Caffeine is a solute, Plant pigments are a Solute.

Explanation:

Answer: Increases.

Explanation: As the temperature of a liquid or solid increases its vapor pressure also increases. Conversely, vapor pressure decreases as the temperature decreases.

Answer:

Here's what I get

Explanation:

Answer:

If anyone else needs a simplified version, this is the other way. (It's just for reference. The person above is right though.)

1. A halogenated gas that may damage the ozone layer - Freon

2. World War I poision gas - phosgene

3. A typical reaction of alkenes - addition

4. Insecticide - DDT

5. Aromatic molecule - benzene

Answer:

c. Species diversity

Explanation:

Because is talking about of organisms, it means, living beings and they are classified like species. There are species of animals and plants

Answer:species diversity

Explanation:

Answer:

False

Explanation:

i would go with false

hope that helped

Answer:

1 significant figure is the Answer

Explanation:

The zeros are not trailing after the digit 6. Hence they are not significant.

Rules:

Non zero digits are always significant.

For example 2356 has 4 significant figures

Zeros between Non zero digits are always significant.

3007 has 4 significant figures

In a decimal trailing zeros are significant.

For example 0.0003 has 1 significant figures and 0.003000 has 4 significant figures.

this contains one significant figure

hope that helped

Answer:

An acid and a base that are the same except for an H+. *Apex

Explanation:

Correct answer for Apex quiz.

Answer:

This is when an acid dissociates into it's ions in water, it loses a

hydrogen.

Explanation:

It is the base member (X-) of a pair compounds that transform into each other by gaining or losing.

Answer: Elevation

Explanation:

The altitude of a feature of the earth's surface is usually called its elevation, vertical distance from a datum plane, usually mean sea level to a point above the earth. Often used synonymously with altitude, elevation is the height on the earth's surface and altitude, the height in space above the surface.

Answer:

2.21 moles of HCl are present in 1.2 L of a 1.84 M HCl solution

Explanation:

Molarity (M),

Molality (m),

Normality (N),

Mass %,

Parts per million(ppm), billion(ppb), thousands(ppt) are some of the terms we use to represent the concentration of the solution that is to represent the amount of solute present in a solvent.

Molarity is moles of solute present in 1L of the solution.

The formula to find Molarity is

and its unit is mol/L

Rearranging the formula

We get

moles = Molarity × Volume

Plugging in the values

(Answer)

Answer:

1019.27 g.

Explanation:

• For the balanced reaction:

2Na + Cl₂ → 2NaCl,

It is clear 2 moles of Na with 1 mole of Cl₂ to produce 2 moles NaCl.

• Firstly, we need to calculate the no. of moles of Cl₂ is needed to react with 57.5 mol Na:

2 moles of Na need → 1 mol of Cl₂, from the stichiometry.

57.5 moles of Na need → ??? mol of Cl₂.

∴ The no. of moles of Cl₂ is needed to react with 57.5 mol Na = (1 mol)(57.5 mol)/((2 mol) = 28.75 mol.

∴ the mass of Cl₂ is needed to react with 57.5 mol Na = (no. of moles of Cl₂)(molar mass of Cl₂) = (28.75 mol)(35.453 g/mol) = 1019.27 g.

Answer:

3.75 grams of methane

Explanation:

Given parameters:

Mass of oxygen gas = 5g

Mass of CH₄ = 5g

Unknown parameters:

Amount of excess reactant = ?

Solution

In order to find the amount of leftover reactant we need to know the reactant that is in excess and in limited supply. The amount of reactant in short supply will determine the extent of the reaction.

Now, we need to write the balanced reaction equation:

CH₄ + 2O₂ → CO₂ + 2H₂O

We first find the number of moles of the reactants.

Number of moles of methane =

Number of moles of methane = = 0.3125mole

Number of moles of oxygen = = 0.156mole

From the equation:

1 mole of methane reacts with 2 moles of oxygen gas

x moles of methane reacts with 0.156moles of oxygen gas

2x = 0.156

x = 0.078moles

We see that the methane is in excess and oxygen gas is in short supply in the reaction.

The amount of excess methane = 0.3125 - 0.078 = 0.2345moles

Now we convert it to mass:

Mass = number of moles x molar mass = 0.2345 x 16 = 3.75grams

Answer:

3.75 grams of methane

Explanation:

Got it right on the exam

Answer:

Explanation:

There are principles that guides the distribution of electrons into the energy levels in an atom. Some of the principles are:

1. The maximum number of electrons in the orbitals of sublevels are:

2 electrons for s-sublevel with one orbital

6 for p-sublevel with 3 orbitals

10 for d- sublevel with 5 orbitals

14 for f-sublevel with 7 orbitals.

The maximum number of electrons in an orbital is 2.

2. Aufbau principle: it states that sublevels with lower energy are filled up before those with higher energy. Sublevels have pattern of filling.

3. Pauli exclusion principle: it states that no two electrons can have the same set of the four quantum numbers.

4. Hund's rule of maximum multiplicity: electrons goes into degenerate orbitals of sub-levels singly before pairing starts.

Answer:

3) Force 1 is a contact force and Force 2 is a non-contact force.

Explanation:

Force is a phenomenon that causes a change in phsical quantity. It is expressed as the product of mass and acceleration.

Contact force is a type force that involves physical contact between two bodies or more. An example is the pulling of a cart. Also, when the wet clothe is being squeeze, a physical contact is established.

Non-contact force occurs between bodies in which there is no physical contact. An example is gravitational force of attraction between two bodies.