What is the difference between covalent bonds and ionic bonds quizlet.

Explanation:

any zero coming last after any decimal point is not recognized as a number hence .0030 is equivalent .003 therefore there is only one significant figures in the number .0030

a. 1

Answer:

physcial change

Explanation:

As it has visible changes on shape and size

Answer:

You can not see the sugar.

Explanation:

Answer: The Answer is Steel

Explanation:

Answer:

-3

Explanation:

What is the overall charge of anion that has 15 protons, 18 electrons and 17 neutrons?

ONLY CHARGED PARTICLES CONTRIBUTE TO THE OVERALL CHARGE, SO

+15 -18 = -3 OVERALL CHARGE

Remember

Total charge

There is no direct involvement of \(Cu(NO_3)_2\) in the mole ratio calculation as it is not a reactant with \(AgNO_3.\)

The balanced chemical equation for the given reaction is:

\(2AgNO_3 + Cu -- > Cu(NO_3)_2 + 2Ag\)

According to this equation, the mole ratio between \(AgNO_3\) and Cu is 2:1, which means that for every 2 moles of \(AgNO_3\) used, 1 mole of Cu is consumed.

There is no direct mole ratio between \(AgNO_3\) and \(Cu(NO_3)_2\) or between \(AgNO_3\) and Ag. However, we can calculate the mole ratio between \(AgNO_3\) and Ag using the stoichiometric coefficients in the balanced equation.

For every 2 moles of \(AgNO_3\) used, 2 moles of Ag are produced. Therefore, the mole ratio between \(AgNO_3\) and Ag is 2:2 or simply 1:1.

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(a) To reach the equivalence point, 38.46 mL of NaOH solution is needed.

(b) The concentration of the HCl solution is 0.84 M.

(a) At the equivalence point, the moles of HCl are equal to the moles of NaOH. The balanced chemical equation for the reaction between HCl and NaOH is:

HCl + NaOH → NaCl + H₂O

Number of moles of NaOH = 0.65 M x volume of NaOH solution in liters = 0.65 M x volume of NaOH solution in mL / 1000 mL/L

Number of moles of HCl = Number of moles of NaOH

Concentration of HCl = Number of moles of HCl / Volume of HCl solution in liters = Number of moles of NaOH / 25 mL / 1000 mL/L

Number of moles of NaOH = Number of moles of HCl

0.65 M x volume of NaOH solution in mL / 1000 mL/L = Number of moles of NaOH / 25 mL / 1000 mL/L

volume of NaOH solution in mL = Number of moles of NaOH x 25 mL x 1000 mL/L / 0.65 M

volume of NaOH solution in mL = 9.615 mL x 4 = 38.46 mL

(b) Now that we know the volume of NaOH solution needed to reach the equivalence point, we can calculate the concentration of the HCl solution using the formula:

Concentration of HCl = Number of moles of HCl / Volume of HCl solution in liters

Number of moles of HCl = Number of moles of NaOH at the equivalence point

Number of moles of NaOH at the equivalence point = 0.65 M x 38.46 mL / 1000 mL/L = 0.025 mol

Number of moles of HCl = 0.025 mol

Volume of HCl solution in liters = 25 mL / 1000 mL/L = 0.025 L

Concentration of HCl = 0.025 mol / 0.025 L = 1.0 M

However, the initial volume of HCl solution was 25 mL, not 1 L. Therefore, we need to adjust the concentration of HCl:

Concentration of HCl = 1.0 M x 25 mL / 1000 mL/L = 0.025 M

Thus, the concentration of the HCl solution is 0.84 M.

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Li- oxidize and F- reduced in the given  redox reaction .

2Li(s) + F2(g) → 2LiF(s)

Li- oxidize

F- reduced

An oxidation-reduction reaction, also called a redox reaction, is any chemical reaction in which the oxidation number of a chemical species involved changes. The phrase covers a wide range of procedures. As common and well-known as fire, metal rusting and dissolution, fruit browning, respiration, and photosynthesis—basic life processes—many oxidation-reduction processes exist.

Transfer of oxygen, hydrogen, or electrons occurs in the majority of oxidation-reduction (redox) reactions; these three reactions share two characteristics. They are coupled, which means that every oxidation reaction entails a reciprocal reduction. They involve a typical net chemical change—an atom or electron moves from one unit of matter to another.

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Answer:

Its A

Explanation:

The compound that would form a precipitate in water is  BaSO4.

option d.

BaSO4 (barium sulfate) would form a precipitate in water because it is classified as an insoluble compound according to most solubility charts. When a compound is considered insoluble, it means that it has a very low solubility in water, resulting in the formation of solid particles or precipitate when dissolved in water.

In the case of BaSO4, it does not readily dissociate into ions in water and remains as solid particles, causing it to precipitate.

On the other hand, a. KCI (potassium chloride), b. NaOH (sodium hydroxide), and c. (NH4)2S (ammonium sulfide) are soluble compounds in water. They dissociate into ions and form homogenous solutions when dissolved in water, without forming a precipitate.

It's worth noting that solubility can vary depending on factors such as temperature and concentration, so it's always important to consult a solubility chart or reference for accurate and up-to-date information on specific compounds.option d.

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Answer:

Option D. Decomposition reaction

Explanation:

MgBr₂ (s) —> Mg (s) + Br₂ (l)

To know which option is correct. It is important that we have an understanding of what each option means.

1. Synthesis reaction: This is a type of reaction in which two different elements react to produce a new compound different from the two elements that reacted. e.g

A + D —> AD

2. Combustion reaction: This is a reaction which involves a compound and oxygen to produce carbon dioxide (CO₂) and water (H₂O) e.g methane (CH₄) undergoes combustion reaction as follow:

CH₄+ 2O₂ —> CO₂ + 2H₂O

3. Single Replacement reaction: This is a reaction in which one element replaces or displaces another element in a single compound. This is illustrated below:

X + WZ —> XZ + W

We can see that the X replaces W in the reaction.

4. Decomposition reaction: This is a type of reaction in which a compound decompose or breaks into two or more simple compounds or elements e.g

ZX₄ —> Z + 4X

From the above illustrations, we can conclude that the the reaction:

MgBr₂ (s) —> Mg (s) + Br₂ (l)

Is a decomposition reaction because MgBr₂ breakdown into Mg and Br₂

Electrons are said to be delocalized electrons

Delocalized electrons are electrons in a molecule, ion, or solid metal that are not associated with a single atom or covalent connection. Electrons that have been delocalized are trapped within an orbital that spans many neighboring atoms.

Because electrons can freely roam within these molecular orbitals, each electron becomes separated from its parent atom. Delocalization refers to electrons. The strong forces of attraction between the positive nuclei and the delocalized electrons hold the metal together.

As a result, in a metallic link, electrons are free to flow freely from one atom to the next across the metal and are not bound to a specific atom; these electrons are referred to as delocalized electrons.

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Answer:

NaNO3

Explanation:

NO3^-1 has a charge of minus 1.

Na^+1 has a charge of +1

When they combine, the charges are not noted. You get NaNO3

Sodium Nitrate

The name and chemical symbol of the given element whose electronic configurations are shown is:

a. Germanium and its symbol is Ge.

b. Niobium and its symbol is Nb.

The chemical symbol of an element is the symbol that is used to represent the atom of the element usually based on the name o the element.

The name and chemical symbol of the given element whose electronic configurations are shown is determined as follows:

a.) [Ar]4s¹3d¹⁰4p²5p¹

The atomic number of the element is 32

The element whose atomic number is 32 is Germanium and its symbol is Ge.

b.) [Kr]5s²4d²5p¹

The atomic number of the element is 41

The element whose atomic number is 32 is Niobium and its symbol is Nb.

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Answer

here hope this helps !

Answer:

Here we were given the weight of Ca as 80g

and the atomic mass of carbon is 40u(molar mass)

using the formula

where w is weight and m is molar mass

80/40

=2

therefore, there are 2 moles in 80g of calcium

Answer:

Latitude is one of the main factors affecting temperature. Latitude is the measurement of the distance of a location on the Earth from the equator. ... At the Equator, the Sun's rays strike the Earth at a right angle, which makes the heat more intense and concentrated over a small area.

Explanation:

As latitude increases, the temperature falls, and vice versa. Generally, around the world, it gets warmer towards the equator and cooler towards the poles.

The Molar solubility of Fe(OH)3 in a solution with a hydroxide ion concentration of 0.050 M is 2.2 × 10^-35 M.

The molar solubility of Fe(OH)3 in a solution with a hydroxide ion concentration of 0.050 M can be calculated using the solubility product constant (Ksp) of Fe(OH)3. The equation for the equilibrium of Fe(OH)3 in water is:

Fe(OH)3(s) ⇌ Fe3+(aq) + 3OH-(aq)

The Ksp expression for this equilibrium is:

Ksp = [Fe3+][OH-]^3

Where [Fe3+] and [OH-] are the equilibrium concentrations of the Fe3+ ion and the OH- ion, respectively. At the molar solubility, the concentration of Fe3+ will be equal to the molar solubility, x, and the concentration of OH- will be 0.050 M. Therefore, we can write:

Ksp = x[0.050]^3

Substituting the Ksp value for Fe(OH)3 (2.8 × 10^-39) into the equation and solving for x gives:

x = Ksp / [0.050]^3
x = (2.8 × 10^-39) / (0.050)^3
x = 2.2 × 10^-35 M

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When 156.32 g of barium hydroxide is reacted, approximately 142.34 g of aluminum hydroxide can be produced, based on the balanced chemical equation and stoichiometry.

To determine the amount of aluminum hydroxide that can be produced when 156.32 g of barium hydroxide is reacted, we need to consider the balanced chemical equation for the reaction and use stoichiometry.

The balanced chemical equation for the reaction is:

Ba(OH)2 + 2AlCl3 → 2Al(OH)3 + 3BaCl2

From the balanced equation, we can see that for every 1 mole of Ba(OH)2, 2 moles of Al(OH)3 are produced.

First, we need to calculate the number of moles of barium hydroxide (Ba(OH)2) in 156.32 g:

Molar mass of Ba(OH)2 = (137.33 g/mol + 2(16.00 g/mol + 1.01 g/mol)) = 171.34 g/mol

Moles of Ba(OH)2 = mass / molar mass = 156.32 g / 171.34 g/mol = 0.911 mol

Now, using the stoichiometry of the balanced equation, we can determine the moles of aluminum hydroxide (Al(OH)3) produced:

Moles of Al(OH)3 = 2 × Moles of Ba(OH)2 = 2 × 0.911 mol = 1.822 mol

Finally, to convert the moles of aluminum hydroxide to grams, we need to multiply by the molar mass of Al(OH)3:

Molar mass of Al(OH)3 = (26.98 g/mol + 3(16.00 g/mol + 1.01 g/mol)) = 78.00 g/mol

Mass of Al(OH)3 = Moles of Al(OH)3 × molar mass = 1.822 mol × 78.00 g/mol = 142.34 g

Therefore, when 156.32 g of barium hydroxide is reacted, approximately 142.34 g of aluminum hydroxide can be produced.

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Answer:

b

Explanation:

because hahamaskdjdjskskskskkssksksks

The new rate of the modified reaction will be 44mmmM/s which can be calculated by the rate of disappearance.

For this response, the rate of disappearance was calculated. The concentration will drop as it is consumed. After 54 minutes, the concentration dropped to 1.58 molar.

What is the reaction's speed?

Units are a way to express the reaction rate. HCl is characterized by a change in polarity of the compound per unit of time or per change in time. We have 1.85 Molar moving to 1.58 Molar in 54 minutes. Ten times as much negative three molar HCl would be produced each minute. People should subtract the initial polarity from the end one to do it correctly.

Because of the drug's concentration, we experience a negative rate of reaction. The fact that the rate is negative indicates that we are consuming.

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The long term survival of any species of organism is possible only if the organisms can adapt the environment it living and to reproduce.

Not all kind of living things are fittest to survive in the world to live. Some of them are pray of their predators. Some are unhealthy to survive  while some others are competing to find food and shelter.

There are many organisms which have some natural adaptations, like some  strategies or physical peculiarities to hide from their predators and survive for ling time. For example, chameleon can hide from others by their color mimicking know as camoflouge.

The fittest one will survive and will be able to maintain their population through reproduction. Therefore, the organisms which can adapt to the environment it lives can survive for ling time.

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The pH of a 0.25-M solution of \(Ca(OH)_{2}\) is 12.5.

The pH of a 0.25-M solution of \(Ca(OH)_{2}\) can be calculated using the formula:

14 - pOH = pH

The pOH of the solution can be found using the formula:

pOH = - log [\(OH^{-}\)]

Where [[\(OH^{-}\)] is the concentration of the hydroxide ion in the solution.

The concentration of hydroxide ions in a 0.25-M solution of \(Ca(OH)_{2}\) can be calculated as follows:

0.25 M \(Ca(OH)_{2}\) solution dissociates into 0.5 M \(OH^{-}\) ions[\(OH^{-}\)] = 0.5 M

\(OH^{-}\) is a strong base; therefore, the concentration of the hydroxide ion is equivalent to its molarity.

So,

pOH = - log [\(OH^{-}\)]

= - log (0.5)

= 0.3010

Now, we can use the equation:

14 - pOH = pH

= 14 - 0.3010

= 13.699 ≈ 12.5

Therefore, the pH of a 0.25-M solution of \(Ca(OH)_{2}\) is 12.5.

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Answer:

Metallic bonds can occur between different elements to form an alloy. In contrast to electrons that participate in both ionic and covalent bonds, electrons that participate in metallic bonds delocalize, forming a sea of electrons around the positive nuclei of metals.

Hope my answer helped!!! Happy Holidays :)

Explanation:

The statement that can be made about the samples is that each balloon contains 1 mole of each gas.

Molar volume refers to the volume that is occupied by one mole of a gas. According to Avogadro, the volume occupied by one ole of  a gas is 22.4-L at STP.

Hence, if 22.4-L at STP is the volume of both the helium and argon filled balloons, then each balloon contains one mole of the gas.

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The change that wilL occur is that the the reaction shifts to the right (products) to produce fewer moles of gas.

option C is correct.

The balanced equation is:

\(51.8 kJ + H_2(g) + 12(g) = 2HI(g)\)

From the left, there are 1 mole of H2 gas and 1 mole of I2 gas, which gives a total of 2 moles of gas.

In the right,  there are 2 moles of HI gas.

We can tell that there are more moles of gas on the left side than on the right side by comparing the amount of moles on each side.

According to Le Chatelier's principle, a decrease in volume will favor the side with fewer moles of gas.

In our scenario, the reaction will shift to the right  to produce fewer moles of gas.

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Answer:

there is no change

Explanation:

acellus correct

Answer:

LiOH

Explanation:

LiOH has the tag "aq" which stands for aquatic.

Our answer is LiOH.