The weak acid HA is 4 % ionized (dissociated) in a 0.30 M solution. A. What is Ka for this acid?B. What is the pH of this solution?

Answer:

F = ma, or force is equal to mass times acceleration.

Answer:

Esto se debe a la rotación de la tierra

Explanation:

Surface ocean currents curve to the right in the Northern Hemisphere because the Earth rotates on its axis, circulating air is deflected toward the right in the Northern Hemisphere and toward the left in the Southern Hemisphere. This deflection is called the Coriolis effect.

1. The IUPAC name of N is nitrogen.

2. Nitrogen dioxide

3.The IUPAC name of O is oxygen

4.The IUPAC name of OH is hydroxyl.

The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.

IUPAC names for the given compounds are:1.1. N: Nitrogen

The IUPAC name of N is nitrogen.

It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide

Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.

The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen

Explanation: The IUPAC name of O is oxygen.

It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.

X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.

Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.

It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.

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Note: The complete question is given below

Provide the IUPAC names for the following compounds:

\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)

C6H5CH(CH3)2

H2NCH2CH2CH2CH2CH2NH2

CH3CH2CH2CH2CH2OH

CH3CH2CH2CHOHCH3

Indium has higher electronegativity  as compare to Indium, because boron has smaller atomic size.

What is Electronegativity?

Electronegativity is a measure of an atom's ability to attract electrons towards itself when it is chemically combined with another atom. It is a relative scale that ranges from 0.7 to 4.0, with fluorine having the highest electronegativity value of 4.0. The electronegativity of an atom depends on several factors, including the number of protons in its nucleus, its distance from the nucleus, and the shielding effect of inner electrons. The electronegativity value of an element is useful in predicting the polarity of bonds formed between atoms and the distribution of electrons within a molecule.

Boron and Indium are both metallic elements in the same period of the periodic table. However, boron has a smaller atomic size and higher effective nuclear charge than indium. This makes boron a more electronegative element than indium, as the electrons in boron's valence shell are more strongly attracted towards its nucleus than in indium. Therefore, boron has a greater electronegativity than indium.

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Answer:

We need more? What else is in the question? This is unanswerable.

Explanation:

Answer:

962.32 or 962320 if it's 4184j per cal

Explanation:

1cal = 4.184j

Answer:

Lattice energy is the energy required to convert a mole of ionic solid into its constituent ions in the gas phase

Explanation:

Lattice energy is usually calculated by the Born-Haber cycle, from the affinity energies and sublimation ethalphy values. It is used as an estimation of the ionic energy strength between the ions in an ionic compound.

It is defined as the energy needed to broke 1 mol of a given ionic compound into its ions in the gaseous state. For example, the lattice energy for sodium chloride (NaCl) is the energy required to separate 1 mol of solid ionic compound (NaCl(s)) and produce the sodium and chlorine ions in the gas phase: Na⁺(g) and Cl⁻(g).

Answer:

a. True

Explanation:

Hello there!

In this case, as Grignard reagents are widely used in organic-synthesis procedures, since they are compelling nucleophiles able to react with electrophiles such as carbonyl compounds (aldehydes, ketones, esters, carbon dioxide, etc) and epoxides;  they are involved in the addition of new C-C bonds to an starting carbon chain; therefore, this statement is a. True.

Best regards!

The derived unit for voltage inside the International System of Units is called volt. V is the symbol for voltage. Therefore, the correct option is option D.

Voltage seems to be the difference throughout electric potential between two locations, often referred to as electrical pressure, electric tension, as well as (electric) potential difference.

It refers to the labor required per unit of charge that move pure test charge between two places inside a static electric field. The derived unit for voltage inside the International System of Units is called volt. V  is the symbol for voltage.

Therefore, the correct option is option D.

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The solubility of the salts is affected by the temperature changes. 1. NaCl is least affected by temperature. 2. supersaturated. 3. 60 grams KBr. 4. Ethanol has both polar and non-polar groups. 5. Mixing and shaking.

A KBr solution with 90 gm solute in 100 grams of water at 50 degrees is classified as supersaturated. 60 grams of KBr are needed to make a saturated solution in 100 gm of water at 30 degrees.

Ethanol is a general solvent due to the presence of both the polar and the non-Polar groups. As a result, it is easier to dissolve both polar molecules and non-Polar molecules. The dissolving rate can be increased by mixing or shaking the solution. Also, the sugar dissolves faster in hot than cold tea.

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Answer:

I think 10

Explanation:

A contraption that swiftly prepares food is run by infrared rays. Microwaves employ infrared rays to heat meals by warming any water that may be present.

Numerous food production processes, including drying, boiling, heating, peeling, polyphenol recovery, freeze-drying, antioxidant recovery, microbiological inhibition, sterilizing grains, baking bread, roasting food, making juices, and cooking food, all use infrared technology.

Infrared radiation has the ability to ease or release muscle tension and encourage local blood circulation in the body. Infrared radiation has been used in conventional and modern medicine to treat conditions including autoimmune diseases and issues with wound healing in addition to relieving muscle pain and tension.

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I assumed btb was there even at invisible levels

Answer:

Answer: The two types of fibres obtained from the fleece of a sheep are beard hair, which are coarse and fine, and soft under hair, which grow near the skin. The under hair are used to make wool.

Explanation:

mark brainly please!

(I didn't copy the person above me! I just realized we had the same answer.)

Answer:

Gathering viscosity data on a material gives manufacturers the ability to predict how the material will behave in the real world.

Example:

If toothpaste does not have the correct viscosity, it can either be too difficult to pump out from the tube, or pump out too much.

Answer:

H2SO4(acid), NaOH(base)

Explanation:

The following equation is Double Displacement reaction.

Al₂(SO₄)₃(aq) + Ca(OH)₂(s) → Al(OH)₃(s) + CaSO₄(s)

In a Double Displacement reaction, exchange of ions takes place between two ionic reactants. For example -

AB + CD → AD + CB

KI(aq) + Pb(NO₃)₂(aq) → 2KNO₃(aq) + PbI₂(s)

Na₂S(aq) + 2HCl(aq) → 2NaCl(aq) + H₂S(g)

HCl(aq) + NaOH(aq) → NaCl(aq) + H₂O(l)

Given,

reaction is - Al₂(SO₄)₃(aq) + Ca(OH)₂(s) → Al(OH)₃(s) + CaSO₄(s)

Therefore, the equation is Double Displacement reaction.

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Answer:

kantut kantut kantut jdjdjdhdhehsbsbdhjdjsbdjsusgdiehdghd

Answer:

A

Explanation:

The boys are pulling in opposite directions and that will make unbalance

Answer:

a. 5.39 atm

Explanation:

Pressure = ?

Volume = 1 L

Temperature = 298 K

Mass = 9.70g

The formular relating these variables is the ideal gas equation;

PV = nRT

where R = gas constant = 0.082057 L.atm.K-1.mol-1

n can be obtained from the formular below;

n = mass / molar mass = 9.70 / 44

n = 0.2205 mol

P = nRT / V

P = 0.2205 * 0.082057 * 298 / 1

P = 5.392 atm

The correct option is option A.

Answer

Explanation

Given data:

8Al(s) + 3Fe₃O₄(s) ---> 4Al₂O₃(s)+ 9Fe(s)

Al₂O₃(s) ️Hf = -1669.8kJ/mol

Fe₃O₄(s) ️Hf = -1120.9 kJ/mol​

Step-by-step solution:

The ️Hf for the reaction can be calculated using the formula below:

For Al(s) and Fe(s), their ΔHf is arbitrary zero.

Therefore, the ore, the ️Hf for the is:reaction

The length measurements in increasing order of magnitude from smallest to largest is Nanometer, micrometer, centimeter, decimeter, dekameter, kilometer.

Measurement is the quantification of attributes of an object or event, which can be used to compare with other objects or events.

Measurement is a process of determining how large or small a physical quantity is as compared to a basic reference quantity of the same kind.

Hence, Among the given length measurements, The increasing order of magnitude from smallest to largest is Nanometer, micrometer, centimeter, decimeter, dekameter, kilometer.

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In order to convert a temperature in celsius to a temperature in Fahrenheit, we need to use the following conversion formula:

(°C*9/5) + 32

Now we use the 57°C value in the formula:

(57 * 9/5) + 32

(513/5) + 32

102.6 + 32

134.6

The temperature of 57° in Fahrenheit will be 134.6°

The moles of Cl₂(g) will be present at equilibrium is 3.94 × 10⁻⁴ mol

To determine the number of moles of Cl₂(g) at equilibrium, we need to use the given equilibrium constant (Kₑ) and the initial concentrations of CO(g) and COCl₂(g).

Given:

[CO(g)] = 0.3500 mol

[COCl₂(g)] = 0.05500 mol

Kₑ = 1.2 × 10²

The balanced equation for the reaction is:

CO(g) + Cl₂(g) ⇌ COCl₂(g)

Let's denote the number of moles of Cl₂(g) at equilibrium as x. At the start, we have [Cl₂(g)] = 0 mol, but it will change by x at equilibrium.

Using the equilibrium expression, we can write:

Kₑ = [COCl₂(g)] / ([CO(g)] * [Cl₂(g)])

Plugging in the values:

1.2 × 10² = [COCl₂(g)] / (0.3500 * [Cl₂(g)])

To solve for [Cl₂(g)], we need to isolate it on one side of the equation:

[Cl₂(g)] = [COCl₂(g)] / (0.3500 * Kₑ)

Now, let's substitute the given values:

[Cl₂(g)] = 0.05500 / (0.3500 * 1.2 × 10²)

[Cl₂(g)] ≈ 3.94 × 10⁻⁴ mol

Therefore, approximately 3.94 × 10⁻⁴ moles of Cl₂(g) will be present at equilibrium.

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The question was Incomplete, Find the full content below:

Starting with 0.3500 mol CO(g) and 0.05500 mol COCl₂(g) in a 3.050-L flask at 668 K, how many moles of Cl₂(g) will be present at equilibrium

CO(g) + Cl₂(g) ⇄ COCl₂(g)  Ke 1.2 x 10^{2} at 668 K

The percent transmittance (%T) and absorbance (A) of a solution are related by an equation which can be used to solve this question.

The percent transmittance (%T) and absorbance (A) of a mixture are associated by the following equation:

%T = 100 x 10^(-A)

We are given that the %T value of the solution is 51.6% at a wavelength of 550 nm. To find the absorbance (A), we can rearrange the equation above:

A = -㏒(%T / 100)

On substituting the value in the given %T value, we get:

A = -㏒(51.6 / 100) = -㏒(0.516) = 0.286

Therefore, the absorbance of the solution at a wavelength of 550 nm is 0.286.

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Explanation:

kinetic energy = ½mv²

1800 = ½ × m × 11.2²

1800 = ½ × m × 125.44

3600 = 125.44m

m = 3600/125.44

m = 28.7 Kg

Answer:

awdaef

Explanation:

The amount, in mL, of the suspension that should be given to an infant weighing 17 lb will be 1.16 mL

0.8 mL of the liquid contains 80.0 mg of the drug.

The recommended dose is 15 mg per kg of body weight

The infant to be given the drug weighs 17 lb.

First, let's convert the weight of the infant to kg.

1 lb = 453.59 g

17 lb =       453.59 x 17/1

                   = 7711.03 g

1000 g = 1 kg

7711.03 g = 7711.03 x 1/1000

               = 7.711 kg

So, the baby's weight is 7.711 kg.

The drug dose for the baby can thus be calculated as:

15 mg x 7.711 = 115.67 mg

But 0.8 mL of the drug contains only 80.0 mg. How many mL will contain 115.67 mg?

                   0.8 x 115.67/ 80.0 = 1.16 mL

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Answer:

So, the mole ratio between sodium and sodium oxide is 2:1=2

Explanation:

Answer:1 moles Sodium Oxide = 61.97894 gram

Explanation: got it from my teacher