Identify the following salts as neutral, acidic, or basic. Drag each item to the appropriate bin.
1. LiF
2. SrBr2
3. NH4CN
4. NH4Br
5. KCN
6. NH4ClO4
7. LiNO3
A. Neutral salts.
B. Acidic salts.
C. Basic salts.

Answer:

A salt is a neutral ionic compound. Let's see how a neutralization reaction produces both water and a salt, using as an example the reaction between solutions of hydrochloric acid and sodium hydroxide. The overall equation for this reaction is: NaOH + HCI → H2O and NaCl.

Explanation:

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\(\\ \orange{MaggieEve}\)

Answer: A

Explanation:

q=heat absorbed=+250J

W=−PΔV=−0.5atm×(10−1)

=−4.5L−atm

=−4.5×101J=−454.5J

Now q=ΔE−W

ΔE=q+W=250−454.5

=−204.5J

The change in internal energy (ΔU) is -211 J.

According to the first law of thermodynamics;

ΔU = q + w

ΔU = change in internal energy

q = heat absorbed/ emitted

w = work done on or by the system

We can see from the question that  250 J of heat was absorbed from the surroundings hence q =  250 J

w= PΔV = 0.50 atm(10.1 L -  1.0 L) = 4.55 atm L

But;

1 L atm = 101.325 J

4.55 atm L =  4.55 atm L ×  101.325 J/ 1 L atm

= 461 J

Now;

ΔU = 250 J - 461 J

ΔU = -211 J

Note that work done is negative because the gas expands and does work on the surrounding.

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The best description of the relationship between population size, carrying capacity, and limiting factors is: "The size of a population usually stays near its carrying capacity due to limiting factors."

Carrying capacity refers to the maximum number of individuals that a particular environment can sustainably support. It represents the limit to which a population can grow given the available resources, such as food, water, and habitat. Limiting factors, on the other hand, are the factors that restrict population growth by reducing birth rates, increasing death rates, or limiting access to resources.As a population approaches its carrying capacity, limiting factors come into play and regulate the population size. These limiting factors can include competition for resources, predation, disease, availability of suitable habitat, and other environmental factors. They act as checks on population growth, preventing it from exceeding the carrying capacity of the ecosystem.

Therefore, the size of a population usually stays near its carrying capacity because the limiting factors ensure that the population does not exceed the available resources and ecological limits of the environment. If the population surpasses the carrying capacity, the limiting factors will intensify, causing a decline in resources and an increase in mortality rates, which ultimately brings the population back towards the carrying capacity.It's important to note that the relationship between population size, carrying capacity, and limiting factors is dynamic and can vary depending on various ecological and environmental factors.

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To get the number of moles of Cu, look up its molar mass. The mole ratio of Cu to Ag is 1:1 if the reaction is Cu(s) + AgNO3(aq) CuNO3(aq) + Ag(s).

Copper has a molar mass of 63.5 g/mol. Page 15 Molar Mass: An Overview The atomic mass of a copper atom is 63.5 amu. Copper has a molar mass of 63.5 g/mol.

You need to know the product's mass and its molar mass (g/mol), which is the mass of one mole of the product, in order to calculate the moles of a substance. The product's molar mass is then divided by the product's mass.

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Answer:

Explanation:

Here, we want to get the number of calories Q of heat needed

Mathematically:

Substituting the values, we have it that:

Answer:

What is the key difference between gases and liquids? EZZZZZ. The particles in a liquid are attracted to one another; the particles in a gas *are not attracted *.

Explanation:

The empirical formula of polyethylene can be determined by converting the given percentages of carbon (C) and hydrogen (H) into grams. To find the grams of each element, we assume a 100.0 g sample of polyethylene.

For carbon:

Mass of carbon = 86.0% × 100.0 g = 86.0 g

For hydrogen:

Mass of hydrogen = 14.0% × 100.0 g = 14.0 g

Therefore, in a 100.0 g sample of polyethylene, there are 86.0 grams of carbon and 14.0 grams of hydrogen.

The empirical formula of a compound represents the simplest whole-number ratio of atoms present in the compound. To determine the empirical formula, we need to find the ratio of carbon to hydrogen in terms of moles.

First, we convert the masses of carbon and hydrogen into moles using their respective molar masses. The molar mass of carbon is approximately 12.01 g/mol, and the molar mass of hydrogen is approximately 1.008 g/mol.

Number of moles of carbon = 86.0 g / 12.01 g/mol ≈ 7.162 mol

Number of moles of hydrogen = 14.0 g / 1.008 g/mol ≈ 13.89 mol

Next, we divide the number of moles of each element by the smallest number of moles to get a simplified ratio.

Carbon: Hydrogen ≈ 7.162 mol : 13.89 mol ≈ 1 : 1.939

Since we want to express the ratio in whole numbers, we multiply both sides by 2 to get a whole number ratio.

Carbon: Hydrogen ≈ 2 : 3.878

Rounding to the nearest whole number, we find that the empirical formula of polyethylene is CH₂.

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The major organic product of the given reaction is buten-2-one. Its structure is attached in image below. Therefore, option III is correct.

A chemical reaction is a hydration reaction. Water is one of the reactants converted into products. The hydration of alkenes to produce alcohols is one of the most common hydration reactions. The hydration of ethene, for example, produces industrial ethanol.

Hydration of alkynes by H₂SO₄ and HgSO₄ considers the addition reaction following Markovnikov's rule. Addition here is two times and the water get take away from the carbon resulting formation of buten-2-one as product.

Thus, option III is correct.

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Answer:

-70.87 kJ

Explanation:

Let's consider the following balanced equation.

1/2 O₂(g) + SO₂(g) ⇄ SO₃(g)

We can calculate the standard Gibbs free energy of reaction (ΔG°r) from the standard Gibbs free energies of formation (ΔG°f) using the following expression.

ΔG°r = 1 mol × ΔG°f(SO₃(g)) - 1/2 mol × ΔG°f(O₂(g) - 1 mol × ΔG°f(SO₂(g))

ΔG°r = 1 mol × (-371.06 kJ/mol) - 1/2 mol × 0 kJ/mol - 1 mol × (-300.194 kJ/mol)

ΔG°r = -70.87 kJ

The compound has an empirical formula of \(K_2H_2P_2O_8\) and a molecular formula of \(K_2HPO_4\).

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The correct question would be as

The composition of a compound is 28.73% K. 1.48% H, 22.76% P, and 47.03% O. The molar mass of the compound is 136.1 g/mol. What is the Molecular Formula of the compound?

\(KH_2PO_4\\KH_3PO_4\\K_2H_4P_20_{12}\\K_2H_3PO_6\)

Answer:

alkali metals

Explanation:

alkali metals only have one valence electron, meaning they are extremely reactive. they are considered the most reactive on the periodic table.

The concentration of A is decreasing faster than A₂ increases.

option C.

The rate of reaction, also known as the reaction rate, is a measure of how quickly a chemical reaction takes place.

Reaction rate represents the change in concentration of reactants or products per unit of time.

The given relationship between the two concentrations;

2A  ⇆  A₂

make A₁ the subject of the formula;

A =  ⇆  A₂ / 2

From the equation given above we can see that the concentration A is decreasing at a faster rate compared to concentration of A₂.

Thus, according to the graph, the concentration of A is decreasing faster than A₂ increases.

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Answer:

Energy was gained when the sodium and hydroxide ions formed new bonds with the water.

Explanation:

The other answer choices are incorrect because:

Energy was absorbed when the bonds between sodium and hydroxide ions were broken: This is incorrect because breaking bonds requires energy, so energy is absorbed rather than released.

Energy was released when the sodium and hydroxide ions came together to form NaOH: This is incorrect because the reaction being described is dissolution of NaOH in water, not formation of NaOH from its constituent ions.

Energy was released when the bonds between sodium and hydroxide ions were broken: This is incorrect for the same reason as the first option. Breaking bonds requires energy, so energy is absorbed rather than released.

Answer: this correct answer will be energy was released when the sodium and hydroxide ions formed new bonds with the water.

Explanation:

The total mass of the balloon and its content is 1521.17 g, the number of moles of CO₂ in the balloon is 34.15 mol, and the number of CO₂ molecules in the balloon is 2.06 x 10²⁵ molecules.

a) The molar mass of CO₂ is 44.01 g/mol. To find the total mass of the balloon and its content, we need to add the mass of the balloon (20g) to the mass of the CO₂ inside the balloon.

Mass of CO₂ = number of moles of CO₂ x molar mass of CO₂

Since the balloon is at STP (standard temperature and pressure), we can use the molar volume of a gas at STP (22.4 L/mol) to find the number of moles of CO₂ in the balloon:

Volume of CO₂ = Volume of balloon = 765 L (at STP)

Number of moles of CO₂ = volume of CO₂ / molar volume of a gas at STP

                                          = 765 L / 22.4 L/mol

                                          = 34.15 mol

Mass of CO₂ = 34.15 mol x 44.01 g/mol

                       = 1501.17 g

Total mass of balloon and its content = 20 g + 1501.17 g

                                                               = 1521.17 g

b) Number of moles of CO₂ in the balloon is 34.15 mol

c) To find the number of CO₂ molecules in the balloon, we need to use Avogadro's number (6.02 x 10²³ molecules/mol).

Number of CO₂ molecules = number of moles of CO₂ x Avogadro's number

                                           = 34.15 mol x 6.02 x 10²³ molecules/mol

                                           = 2.06 x 10²⁵ molecules

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We have our solute = NaCl

We need to find the percent of this solution, given as % (w/v)

% w/v: X grams of solute ------ 100 mL of solution

40 g are diluted in 0.5 mL, therefore:

40 g NaCl ------- 0.5 mL

X ------- 100 mL

X =

Answer:If a liquid is heated the particles are given more energy and move faster and faster expanding the liquid. The most energetic particles at the surface escape from the surface of the liquid as a vapour as it gets warmer. Liquids evaporate faster as they heat up and more particles have enough energy to break away.

Explanation:

Answer: Định luật Raoult là một định luật hóa học vật lý, với ý nghĩa trong nhiệt động lực học. Được thành lập bởi nhà hóa học người Pháp François-Marie Raoult vào năm 1887, nó nói rằng áp suất một phần của mỗi thành phần của một hỗn hợp chất lỏng lý tưởng bằng với áp suất hơi của thành phần tinh khiết nhân với phần nốt ruồi của nó trong hỗn hợp. Kết quả là, việc giảm áp suất hơi tương đối của dung dịch pha loãng của chất tan không lây bằng với phần nốt ruồi của chất tan trong dung dịch.

Explanation: hope this helps :)

The mass of the asteroid is C. 1.2 x \(10^{12}\) Kg

To find the mass of the other asteroid, we can rearrange the equation for the gravitational force between two objects:

F = (G * m1 * m2) / \(r^{2}\)

where F is the force of gravity, G is the gravitational constant, m1 and m2 are the masses of the two asteroids, and r is the distance between them.

Given that the distance between the asteroids is 75000 m, the force of gravity between them is 1.14 N, and one asteroid has a mass of 8 x \(10^{7}\) kg, we can substitute these values into the equation and solve for the mass of the other asteroid (m2):

1.14 N = (6.67430 × \(10^{-11}\) N \(m^{2}\)/\(Kg^{2}\) * 8 x \(10^{7}\) kg * \(m2\)) / \((75000 m)^{2}\)

Simplifying and solving the equation, we find that the mass of the other asteroid (m2) is approximately 1.2 x \(10^{12}\) kg. Therefore, Option C is correct.

The question was incomplete. find the full content below:

Two asteroids are 75000 m apart one has a mass of 8 x \(10^{7}\) kg if the force of gravity between them is 1.14 what is the mass of the asteroid

A. 3.4 x \(10^{11}\) kg

B. 8.3 x \(10^{12}\) kg

C. 1.2 x \(10^{12}\) kg

D. 1.2 x \(10^{10}\) kg

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In the pair (a) CH3Br or CH3F, the dominant intermolecular forces in CH3Br are dipole-dipole forces, while CH3F has London dispersion forces. Therefore, CH3Br has the higher boiling point [1].

In the pair (b) CH3CH2CH2OH or CH3CH2OCH3, the dominant intermolecular forces in CH3CH2CH2OH are hydrogen bonds, while CH3CH2OCH3 has dipole-dipole forces. Therefore, CH3CH2CH2OH has the higher boiling point.

In the pair (c) C2H6 or C3H8, the dominant intermolecular forces in C2H6 and C3H8 are London dispersion forces. Therefore, C3H8 has the higher boiling point.

In the pair (d) MgCl2 or PCl3, the dominant intermolecular forces in MgCl2 and PCl3 are ionic bonds. Therefore, MgCl2 has the higher boiling point.

In the pair (e) CH3NH2 or CH3F, the dominant intermolecular forces in CH3NH2 are hydrogen bonds, while CH3F has London dispersion forces. Therefore, CH3NH2 has the higher boiling point.

In the pair (f) CH3OH or CH3CH2OH, the dominant intermolecular forces in CH3OH and CH3CH2OH are hydrogen bonds. Therefore, CH3OH has the higher boiling point.

In the pair (g) CH3CH2CH2CH2CH2CH3 or 2,2-dimethylbutane, the dominant intermolecular forces in both molecules are London dispersion forces. Therefore, CH3CH2CH2CH2CH2CH3 has the higher boiling point.

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Answer

Latitude or distance from the equator , Temperatures drop the further an area is from the equator due to the curvature of the earth. In areas closer to the poles, sunlight has a larger area of atmosphere to pass through and the sun is at a lower angle in the sky.

Answer:

Metalloid ; semiconductor

Explanation:

The volume of air you might inhale (and exhale) in 8.00 hours is approximately 1903.2 liters.

To calculate the volume of air you might inhale (and exhale) in 8.00 hours, we need to determine the total number of breaths you take in that time and then multiply it by the volume of each breath.

First, let's calculate the number of breaths in 8.00 hours:

Number of breaths per minute = 13

Number of breaths per hour = 13 breaths/minute * 60 minutes/hour = 780 breaths/hour

Number of breaths in 8.00 hours = 780 breaths/hour * 8.00 hours = 6240 breaths

Now, let's calculate the volume of air in liters:

Volume of each breath = 0.305 liters

Volume of air inhaled and exhaled in 8.00 hours = Volume of each breath * Number of breaths in 8.00 hours

Volume of air inhaled and exhaled in 8.00 hours = 0.305 liters/breath * 6240 breaths = 1903.2 liters

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The mass percentage of the solution that we have in the question is  5 g.

Percent w/w (weight/weight) concentration is a way to express the concentration of a solute in a solution as a percentage by mass. It represents the mass of the solute in grams per 100 grams of the solution.

Percent w/w concentration is commonly used in industries such as pharmaceuticals, food and beverage, and cosmetics to measure the concentration of active ingredients or additives in their products.

We know that;

%w/w = weight of the solute/Weight of the solution

Let the weight of the solute be x

1 = x/500 * 100/1

1 = 100x/500

500 = 100x

x = 5 g

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The red line showing the IR spectrum emitted from the earth's surface does not match the blue line showing the expected IR spectrum from a 300˚C object because:

IR spectroscopy studies Infrared (IR) light in the electromagnetic spectrum.

Sensors are used by thermal detection systems, also known as infrared detection systems, to detect radiation in the infrared region of the electromagnetic spectrum.

In order to create an electronic signal, an infrared camera must first detect the thermal energy or heat, that the scene being seen emits. After processing this signal, an image is created.

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The energy that an object has stored due to its position is known as potential energy. Kinetic energy is the energy that a moving thing has as a result of its motion.

The energy that a body has as a result of its position or state is known as potential energy. Potential energy is fully independent of its environment, as contrast to kinetic energy, which is relative to the state of other things in its environment. So a car parked on a hill merely demonstrates potential energy, whereas a car moving at 60 mph demonstrates kinetic energy. As it descends from a certain height at a specific speed, a rock exhibits both potential energy and kinetic energy. A tank of compressed air demonstrates potential energy. Chemical energy is therefore seen as a type of potential energy because it is stored in chemical bonds.

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Answer:

c. A flat board tilted at an angle

Explanation:

form the looks of it, and i dont wanna sound like a flat earther her, cuz im not '-', but the best option here would be the flat board at an angle becasue the earth is tilted and isnt even like it said in the prompt.

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Answer:

b. 51.63%

Explanation:

Step 1: Given data

Step 2: Calculate the mass corresponding to 7.35 × 10⁻³ moles of oxalate

The molar mass of C₂O₄²⁻ is 88.02 g/mol.

7.35 × 10⁻³ mol × 88.02 g/mol = 0.647 g

Step 3: Calculate the mass percent of oxalate in the sample

% w/w = mass of oxalate / mass of the sample × 100%

% w/w = 0.647 g / 1.253 g × 100%

% w/w = 51.63%

For the thing to move, 2 joules were used.

There are numerous shapes that energy can take. Examples of these energies include gravitational energy, mechanical energy, electrical energy, sound energy, chemical energy, nuclear or atomic energy, light energy, heat energy, and so on. Each form has the capacity to alter or change into the other forms.

Energy is a major factor in our daily lives because it is a fundamental need for humans. You need energy to move, rise from bed, or even merely to go down the road. Energy not only heats but also cools our man-made structures.

formula, joules = 1/2*kilogram*{\(\frac{meter}{sec}\)}^2

joule = \(\frac{1}{2}\)*4*1 = 2 joule

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What is formed is a single covalent bond because each atom requires one more electron to complete its octet.

Let us recall that a bond is formed between two atoms when we have to atoms bonded together, the atoms are connected by means of a chemical bond. There are different kinds of bonds that are used to connect atoms together such as;

When we talk about a diatomic molecule, we are talking about a molecule that is composed of two atoms that are exactly the same. This implies that the electronegativities of the atoms must be the same and the bond that is formed would be a nonpolar covalent bond. There are so many of such kinds of molecule that we have in chemistry such as the oxygen molecule, the hydrogen molecule, the fluorine molecule and so on.

Thus, given that diatomic molecule shares a single pair of electrons, we can say that this is a single covalent bond because each atom requires one more electron to complete its octet.

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