Calculate the grams of nitrogen in 234 g of KCN​

Answer:

Hydrogen

Explanation:

Answer:

1. burial

2. Choice

3. pleasure

Explanation:

Mark brainliest! Please!

To determine how much of solution A would be needed to generate the electrical energy used daily in the home

we need to calculate the ratio of the energy released by fusion of hydrogen to the electrical energy used daily.

Energy ratio = Energy released by fusion of hydrogen / Electrical energy used daily

Energy ratio = (8.4 x 10^12) / (3 x 10^8)

To simplify the calculation, we can convert the values to scientific notation with the same exponent:

Energy ratio = (8.4 / 3) x (10^12 / 10^8)

Energy ratio = 2.8 x 10^4

This means that for every unit of electrical energy used daily in the home, we would need 2.8 x 10^4 units of solution A to generate that energy.

Therefore, to generate the electrical energy used daily in the home, we would need 2.8 x 10^4 liters of solution A.

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The molality of the solutions in parts a, b, and c are 0.5 mol/kg, 2 mol/kg, and 4.5 mol/kg, respectively.

To determine the molality of each solution of an unknown nonelectrolyte in water given the freezing-point depressions, we need to use the equation:
ΔTf = Kf × molality
where ΔTf is the freezing-point depression, Kf is the freezing-point depression constant of water (1.86 °C/m), and molality is the amount of solute in moles per kilogram of solvent.
a. For the freezing-point depression of -0.930 °C, we have:
-0.930 = (1.86) × molality
molality = -0.930/1.86 = -0.5 mol/kg
Therefore, the molality of the solution is 0.5 mol/kg.
b. For the freezing-point depression of -3.72 °C, we have:
-3.72 = (1.86) × molality
molality = -3.72/1.86 = -2 mol/kg
Therefore, the molality of the solution is 2 mol/kg.
c. For the freezing-point depression of -8.37 °C, we have:
-8.37 = (1.86) × molality
molality = -8.37/1.86 = -4.5 mol/kg
Therefore, the molality of the solution is 4.5 mol/kg.

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The SI system unit for the amount of a substance is the mole (mol). The mole is a fundamental unit of measurement in chemistry, and it is used extensively in both theoretical and practical applications.

The mole (mol) is the SI system unit for the amount of a substance. It is used to calculate the quantity of an element in a compound or a specific substance in a chemical reaction. The mole is defined as the amount of a substance containing as many elementary entities (atoms, molecules, ions, or electrons) as there are atoms in exactly 12 grams of pure carbon-12.A mole is a counting unit, similar to a dozen or a gross. Just as a dozen refers to 12 items and a gross refers to 144 items, a mole refers to 6.02 x 1023 items. This number is known as Avogadro's number, and it represents the number of atoms, molecules, ions, or electrons in one mole of a substance. The number of moles of a substance can be calculated by dividing the mass of the substance by its molar mass. The molar mass is the mass of one mole of a substance, and it is expressed in grams per mole (g/mol).The mole is an important concept in chemistry because it allows chemists to work with amounts of substances that are too small to see or weigh. It is also useful for balancing chemical equations and predicting the products of chemical reactions. The mole is a fundamental unit of measurement in chemistry, and it is used extensively in both theoretical and practical applications.

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Answer:

4 of each protons and electrons

Explanation:

since the atomic number is 4 it would contain both the same number of protons and electrons

Answer:

The amount of isopropyl alcohol contained in 150 ml of the solution is 117.15 grams

Explanation:

The density of a substance is the mass per unit volume, therefore, we have;

The density of the isopropyl alcohol = 0.785 g/ml at 25°C

The  density = mass/volume

Mass = Density × Volume

The mass of the 150 ml of isopropyl alcohol is therefore;

Mass = 0.785 g/ml × 150 ml = 117.15 g

The amount in grams contained in 150 ml of sample = 117.15 g.

Answer:

oxygen obey the octet rule when reacting to form compounds by adding 2 electrons.

Explanation:

Answer:

See below.

Explanation:

An oxygen atom, in free state has 8 electrons, 2 in the first shell, and 6 in the second. It can only achieve stability if the valency of the valence shell is 0. In order for this, it combines with another atom with the same valency, such as magnesium or another oxygen atom to obey the octet rule. Hope it helps.

Answer:

True

Explanation:

The reason why is because frost is a result of a chemical reaction

The sticker on automotive radiators shows that they require antifreeze to work correctly, summer or winter. It is not advised to use regular water during the summer.

This is because antifreeze is used to prevent rust and corrosion in the radiator. When water is used in place of antifreeze, it does not provide this protection, which leads to rust and corrosion.
The antifreeze solution is a mixture of water and ethylene glycol, which can provide better heat transfer. It helps in lowering the freezing point and elevating the boiling point of the coolant. It also provides good lubrication for the water pump and other cooling system components. Moreover, it helps prevent oxidation of the aluminum components and keeps the coolant pH level in check.
The rust and corrosion may clog the radiator passages and cause engine overheating. The rust can also cause leakage of the coolant, which can damage the engine and other components. In contrast, antifreeze prevents rust and corrosion and increases the lifespan of the cooling system components. It also helps the engine to operate within its recommended temperature range, which prevents engine damage.
During the summer, using water instead of antifreeze can cause damage to the radiator and its components. The antifreeze solution should be checked and replaced periodically to ensure that it works correctly. It is recommended to follow the manufacturer's guidelines while selecting the type of antifreeze to be used in the vehicle. This helps in maintaining the cooling system in good condition and increases the lifespan of the vehicle.

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The name of this compound using IUPAC rules is  3,4-dimethylhexane.

Option D is correct.

the IUPAC nomenclature of organic chemistry is described as a method of naming organic chemical compounds as recommended by the International Union of Pure and Applied Chemistry.

Option A, 2,3-diethylbutane, is incorrect because it has a different carbon chain length and different substituent positions.

Option B, 2-ethyl-3-methylpentane, is incorrect because it has a different carbon chain length and one of the substituents is incorrectly placed.

Option C, 3-methyl-4-ethylpentane, is incorrect because it has a different carbon chain length and the substituent positions are reversed.

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No, the strength of the bonds between the individual molecules did not determine the strength of the intermolecular interactions.

Intermolecular forces are those that exist between molecules. It differs from an intra-molecular force, or the compel which exists within a molecule, because of this. A force within a molecule would therefore resemble an covalent bond. Intermolecular force is the name for the force that exists between molecules.

Intermolecular forces come in five flavors: ion-induced dipole forces, directional antenna dipole forces, induced dipole forces, and dipole-dipole forces. Ions or polar (dipole) molecules are held together by ion-dipole forces. Molecules are connected via intermolecular bonds. The Van der Waals energies are another name for them.

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Answer:

plankton

Explanation:

like in spongebob lol but for real I'm a marine biologist I know this is the answer lol

Answer: type the compound into your search bar then it should tell you what it is for 3. you should look up "what is the formula for -----" same thing for #4

Explanation:

Answer:

2.a.  germanium tetrahydride

2.b. dinitrogen tetrabromide

2.c. diphosphorus pentasulfide

2.d. selenium dioxide

2.e. nitrogen trihydride

2.f. silicon dioxide

3.a. PO3

3.b. SiCl4

3.c. N2O5

3.e. N2O4

3.f. CO

4.a CO2

4.b. SF6

4.c. N2Cl4

4.d. CI4

4.e. PF5

4.f. P2O5

****All numbers are subscripts, please do not write them as is, but to the bottom right of them like shown in the options from question 2.

Explanation:

To name covalent compounds (NM+NM), we use prefixes.

To name covalent compounds goes as follows:

First, name the first element in the formula the normal name it has (ex. Nitrogen, Oxygen). If the first element is present more than once shown by a subscript, use a prefix that will indicate how many there are present (ex. mono, di, tri).

Next, name the second element in the compound using prefixes aswell if present more than once. These elements though, will end with -ide instead of their original name (ex. monoxide, dibromide, trichloride).

Answer:

The pressure is = 897 torr

Explanation:

All these terms describe a mind map detailed graphic , colorful , unordered and creative

The terms that describes a mind map are detailed , as lots of detailing is done using connection symbols

Graphic , they are graphical representation of an information

Colourful , They are colourful as to make it more visually interesting .

Unordered , They information might not be in sequence and so can be called unordered also

Creative , Yes it is creative as it brings out the artist inside you and you think more ideas to make it look more beautiful and understandable .

So All these terms describe a mind map detailed graphic , colorful , unordered and creative.

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When the cold balloon filled with 2.30 L of helium is brought into the salt-conditioned car, the balloon is likely to shrink or decrease in size.

The volume of a gas is directly affected by temperature. When the cold balloon filled with helium is brought into a salt-conditioned car, the temperature inside the car is likely to be lower than the temperature outside. As a result, the temperature of the helium gas inside the balloon will decrease. According to Charles's Law, the volume of a gas decreases with a decrease in temperature, assuming constant pressure. Therefore, the helium gas inside the balloon will contract, causing the balloon to shrink or decrease in size.

Thus, the balloon will shrink or decrease in size when brought into the salt-conditioned car.

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Answer:

V₂ = 167 cm₃

Explanation:

Because you are only dealing with volume and temperature, you can use Charles' Law to find the missing value. This formula looks like this:

V₁ / T₁ = V₂ / T₂

In this formula, "V₁" and "T₁" represent the initial volume and temperature. "V₂" and "T₂" represent the final volume and temperature. You have been given values for all of the variables except for final volume. Therefore, by plugging these values into the formula, you can simplify to find your answer.

V₁ = 100 cm³             T₁ = 150 °C

V₂ = ?                        T₂ = 250 °C

V₁ / T₁ = V₂ / T₂                                          <---- Charles' Law formula

(100 cm³) / (150 °C) = V₂ / (250 °C)           <---- Insert values

(0.667) = V₂ / (250 °C)                               <---- Simplify left side

(0.667) x (250 °C) = V₂                              <---- Rearrange

167 = V₂                                                     <---- Simplify left side

Answer:

1.9 miles per minute

Explanation:

The speed of a substance can be calculated by using the formula:

S = d/t

Where;

S = speed (m/s)

D = distance (m)

t = time (s)

In this question, the units for the distance and time are miles and minutes respectively. Hence, the speed is:

S = 85miles ÷ 45 mins

S = 1.888 miles/min

S = 1.9 miles per minute

Combinations of the elements B2O3 and P2O3 would probably result in a compound with the empirical formula x2y3.

By: Calculating the molarity of each elements from its mass, empirical formulas are generated using empirically measured element masses. Obtaining subscripts for a possible empirical formula by dividing the molar amount of each element by its smallest molar amount.

The chemical formula for glucose is C6H12O6. For every kilogram of carbon and oxygen, there are two moles of hydrogen present. CH2O is the experimental formula for glucose. Ribose has the formula CH2O as well as the chemical formula C5H10O5.

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Answer: In Arizona, climate change is already making deadly heat waves, droughts and wildfires across the state worse. These impacts have real costs on Arizonans' health and economy, including heat-related deaths, higher electricity bills, crop losses and more.

Explanation:

https://www.edf.org/climate/costofinaction- this is where I gathered this info.  Not mine.  But I hope it helps!

Answer:

C

Explanation:

Answer:

C

Explanation:

the ice will melt since it is a liquid. for example if u where to have a hot soda and u put ice into it the ice would melt and the liquid would still be soda just colder from the ice i hope this makes since

NICE its did not work at all

The integrated rate equation for the first-order reaction is as follows:

ln [H2O2] = −kt + ln [H2O2]₀

The concentration of H2O2 after 4000 seconds is 0.040 molar.

The integrated rate equation for the first-order reaction is as follows:

ln [H2O2] = −kt + ln [H2O2]₀

Where[H2O2]₀ is the initial concentration of H2O2;

[H2O2] is the concentration of H2O2 after time t;ln is the natural logarithm;k is the rate constant of the reaction;t is the elapsed time of the reaction In this question, we need to determine the concentration of H2O2 after 4000 seconds. The initial concentration of H2O2 is not provided, so we must assume that it is some concentration of H2O2 at time zero. We will use the integrated rate equation to solve for [H2O2] at 4000 seconds.

ln [H2O2] = −kt + ln [H2O2]₀

ln [H2O2] = −(8.0 × 10⁻⁴ s⁻¹) × (4000 s) + ln [H2O2]₀

ln [H2O2] = −3.2 + ln [H2O2]₀

[H2O2] = e^(−3.2 + ln [H2O2]₀)

[H2O2] = (1.0 × 10⁻³⁰) × [H2O2]₀

At time zero, the concentration of H2O2 is

[H2O2]₀ = 0.040 M.

[H2O2] = (1.0 × 10⁻³⁰) × [H2O2]₀

[H2O2] = (1.0 × 10⁻³⁰) × (0.040 M)

[H2O2] = 0.040 × 10⁻³⁰

[H2O2] = 4.0 × 10⁻³² M

[H2O2] = 0.040 molar

Therefore, the concentration of H2O2 after 4000 seconds is 0.040 molar.

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Answer:

a

Explanation:

The overall equation is \(C_2H_4 + H_2 ---- > C_2H_6\).

A chemical equation is defined as a symbolic representation of a chemical reaction in the form of symbols and formulas, in which reactant elements are given on the left and product units on the right.

For example,

\(NaOH+ HCl ---- > NaCl+ H_2O\)

In this, reactants are converted to products which is symbolized by a chemical equation. For example, iron (Fe) and sulfur (S) combine to form iron sulfide (FeS).

Fe(s) + S(s) → FeS(s)

here, the plus sign indicates that iron reacts with sulfur.

Thus, the overall equation is \(C_2H_4 + H_2 ---- > C_2H_6\).

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The carbon atoms represented by the model are Option B. 6

The given image represents the structure of hexane, which is an organic compound with the chemical formula C6H14. Therefore, the number of carbon atoms represented by the model below is 6, which is option B. The structure of hexane consists of six carbon atoms and 14 hydrogen atoms. It is an alkane that belongs to the class of saturated hydrocarbons, which means that its carbon atoms form single covalent bonds with other atoms.

Hexane is a colorless, odorless liquid that is highly flammable. It is commonly used as a solvent in various industries, such as rubber, textile, and leather. In addition, hexane is also used as fuel in some engines, such as model airplanes and lawnmowers. In summary, the given image represents the structure of hexane, which is an organic compound that consists of six carbon atoms and 14 hydrogen atoms. The number of carbon atoms represented by the model is 6. Therefore, Option B is Correct.

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5.98 x 1023 atoms, not 5.98 x 10-22 atoms, as the latter would mean that there are fewer atoms in the sample than the mass of a single atom, which is not possible.

The reason why the answer is not 5.98 x 10-22 atoms is because the given mass of hydrogen atom is in grams, whereas the answer requires the number of atoms in a given sample. To find the number of atoms, we need to convert the given mass of hydrogen into moles by dividing it by the molar mass of hydrogen, which is 1.008 g/mol. So, 10.0 g of hydrogen is equal to 10.0 g / 1.008 g/mol = 9.921 moles of hydrogen.

Now, to find the number of atoms in this sample, we need to multiply the number of moles by Avogadro's number, which is 6.022 x 1023 atoms/mol. So, 9.921 moles x 6.022 x 1023 atoms/mol = 5.98 x 1023 atoms.

Therefore, the answer is 5.98 x 1023 atoms, not 5.98 x 10-22 atoms, as the latter would mean that there are fewer atoms in the sample than the mass of a single atom, which is not possible.

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To convert moles to gram multiply 3.7 moles of BaF2 to the molar mass of BaF2

BaF2 molar mass = 175.326

3.7 moles x 175.326g = 648.70g BaF2

Explanation:

AH is negative because the reaction gives out heat (exothermic).

AS is negative because the total entropy of the reactants is greater than that of the products (there are 4 moles of gas on reactant side compared to only 1 mole on the product side). Thus, the reactants are said to be "messier" than the products.

AG is negative at lower temperatures because at low temperatures, -TAS is more negative, resulting in the negative sign of AG.

Hope this helps.