Phosphorite is a mineral that contains plus other non-phosphorus-containing compounds. What is the maximum amount of that can be produced from 3.8 kg of phosphorite if the phosphorite sample is 75% by mass

The frequency of the photon of light is 4.4 * 10¹⁶ Hz

Where h is Planck's constant = 6.626 * 10⁻³⁴

f is frequency

E = energy

making f subject of the formula

f = E/h

f = 2.95 × 10⁻¹⁷/6.626 * 10⁻³⁴

f = 4.4 * 10¹⁶ Hz

Therefore, the frequency of the photon of light is 4.4 * 10¹⁶ Hz

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Answer:

Explanation:

Structure of 3-ethyl-5-isobutylnonane

It is given in the following attachment:

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The organic compound 3-ethyl- 5-isobutylnonane contains 9 carbon atoms in the long chain and one ethyl branch at the third carbon atom and one isobutyl group in the 5th carbon atom as in the image.

Hydrocarbons are organic compounds with carbon -hydrogen bonds. The organic compounds are named based on the rules of IUPAC. The compound gets its basic name from the number of carbon atoms in the longest chain.

If the number of carbons atoms is one, the chain is given its suffix meth, eth for two prop for three and so on. The chain with 9 carbon atoms are named with nonane in the end.

Here, the given compound contains an ethyl group as a branch in third carbon in the chain and an isobutyl group in the 5th position as shown in the image given below:

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Answer:

A shift in color and the creation of bubbles are some indicators of a chemical change. The five chemical change conditions: color change, precipitate formation, gas formation, modification of odor, change of temperature.

Answer:

Br (Bromine) is a nonmetal

Answer:

i do not now

Explanation:

Answer: Upon successive breakage into smaller cubes, each time by halving the sides, the volume remains constant while the surface area increases dramatically. The total area of all cubes at each iteration is the red dot on the continuous line plot of area/volume.

Explanation: Hope this helps

Answer:

The total volume is the same and the total surface area doubles.

Explanation:

We know that the total volume for the large cube and the total volume for the small cubes is the same but that the surface area for the smaller cubes is double that of the large cube. So the volume-to-surface-area ratio is as to for the large cube and as to two for the small cubes. The smaller cubes are much more reactive than the large cube because of this ratio. And that is why nanoparticles are so reactive and so useful to us because of this large surface area and very small particles.

The density of the sample of glass with a mass of 37.4 g and a volume of 15.2 mL is - 2.460 g/ml.

The density of a body is defined as ratio of mass per unit volume. Mathematically -

ρ = M/V

M - mass of substance

ρ - density of substance.

V - volume of substance

Given is a sample of glass with a mass of 37.4 g and a volume of 15.2 mL.

From this, we can write -

Mass of glass [M] = 37.4 g

Volume of glass [V] = 15.2 ml

According to the question -

The ratio of mass per unit volume is -

ρ = M/V

Substitute the values of mass and volume, we get -

ρ = 37.4 / 15.2 ml = 2.460 g/cm³.

Hence, the density of the sample of glass with a mass of 37.4 g and a volume of 15.2 mL is - 2.460 g/ml.

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Answer:

the mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50 grams of water at 313 K is

\(31g\)

Explanation:

To determine the mass of potassium nitrate needed to

produce a saturated solution of potassium nitrate in 50 grams of water at 313 K?, then it implies that we need to determine the

solubility of KNO3 is 62g KNO3 in 100g H2O at 313K. And this simply the amount of solute that when it dissolved in that water, then the water will not be able to take more solute again which means it has been saturated.that is the maximum quantity that the water can take at 313K.

If the solubility of KNO3 is 62g KNO3 in 100g H2O at temperature 313K

Then 50 g of water contains potassium nitrate = (62/100 X 50) at 313k = 31g

Therefore, the mass of potassium nitrate would be needed to produce a saturated solution of potassium nitrate in 50 grams of water at 313 K is

31g

Answer:

7.The answer is 2.13 because if u add 3.23 and 4.51 and the answer is 7.74 and u add 2.13 to get 9.87. 3.23 + 4.51 + 2.13 is 9.87

Explanation:

Answer:

The correct answer is option A

Explanation:

The extreme temperatures lead to the unfolding of a polypeptide chain resulting in a change in composition and generally a loss of function. If the protein working as an enzyme denatures, it will make that protein to lose its enzymatic activity.

Answer:

Denatures

Explanation:proteins are very sensitive to temperature change

The key properties a solvent which needs to be suitable for use in recrystallization is that recrystallization solvent not react with the solid sample which taken as a sample for the purification.

Impure crystals can be purified by recrystallization with the help of suitable

solvent. This process is basically depends on two facts one is that most of the compounds are more soluble in the hot solvents as compared to cold ones, and impurities must have solubilities different from those of the given desired compound.

Three key properties of a good recrystallization solvent are as listed below:

. The recrystallization solvent not react with the solid sample which taken as a sample for the purification.

. The solvent must be inexpensive, volatile, and non-inflammable.

. The solvent either dissolve the impurities or not at all. If in case solvent dissolves the impurities which is present in a solid sample, then the impurities acts like that it is not present in the crystal structure of the solid. If in case solvent does not dissolve the impurities in it but dissolve the desired solid, then the impurities is easily removed by filtration techniques.

Thus, we concluded that the key properties a solvent which needs to be suitable for use in recrystallization is that recrystallization solvent not react with the solid sample which taken as a sample for the purification.

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When 50 NBr3 molecules and 57 NaOH formula units react according to the given balanced equation, the result is the formation of 150 NaBr formula units.

According to the balanced equation provided:

2 NBr3 + 3 NaOH -> N2 + 3 NaBr + 3 HOBr

From the equation, we can see that 2 moles of NBr3 react with 3 moles of NaOH to form 3 moles of NaBr.

To determine the number of NaBr formula units formed, we need to convert the given quantities into moles.

Given:

Number of NBr3 molecules = 50

Number of NaOH formula units = 57

To convert the number of NBr3 molecules to moles, we need to divide the given quantity by Avogadro's number. Similarly, for NaOH formula units, we can directly consider them as moles.

Using Avogadro's number (6.022 x 10^23 molecules/mol), we can calculate the number of moles for NBr3 and NaOH:

Number of moles of NBr3 = 50 / (6.022 x 10^23)

Number of moles of NaOH = 57

Now, we can use the mole ratios from the balanced equation to determine the number of moles of NaBr formed. From the equation, we know that 2 moles of NBr3 react to form 3 moles of NaBr.

Number of moles of NaBr = (Number of moles of NBr3) x (3 moles of NaBr / 2 moles of NBr3)

Finally, we can convert the number of moles of NaBr to the number of NaBr formula units using Avogadro's number:

Number of NaBr formula units = (Number of moles of NaBr) x Avogadro's number

Calculating these values, we find that 50 NBr3 molecules and 57 NaOH formula units react to form 150 NaBr formula units.

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The partial pressure of nitrogen at the surface of the water is approximately \(\(3.72 \times 10^{-6}\)\)mmHg.

To calculate the partial pressure of nitrogen at the surface of the water, we can use Henry's Law, which states that the concentration of a gas in a liquid is directly proportional to its partial pressure. The equation for Henry's Law is:

\(\[ \text{Partial pressure of nitrogen} = \text{Henry's law constant} \times \text{Concentration of nitrogen} \]\)

Given that the concentration of nitrogen is\(\(7.2 \times 10^{-6}\)\) M and the Henry's law constant for nitrogen at 25 °C is \(\(6.8 \times 10^{-4}\)\) mol/L·atm, we can substitute these values into the equation.

\(\[ \text{Partial pressure of nitrogen} = (6.8 \times 10^{-4} \, \text{mol/L·atm}) \times (7.2 \times 10^{-6} \, \text{mol/L}) \]\)

Simplifying the calculation gives us the partial pressure of nitrogen in atm.

\(\[ \text{Partial pressure of nitrogen} = 4.896 \times 10^{-9} \, \text{atm} \]\)

To convert the partial pressure to mmHg, we use the conversion factor:\(\(1 \, \text{atm} = 760 \, \text{mmHg}\)\). Multiplying the partial pressure by this conversion factor gives us the partial pressure of nitrogen in mmHg.

\(\[ \text{Partial pressure of nitrogen} = (4.896 \times 10^{-9} \, \text{atm}) \times (760 \, \text{mmHg/atm}) \]\)

Calculating this expression, we find that the partial pressure of nitrogen at the surface of the water is approximately \(\(3.72 \times 10^{-6}\)\)mmHg.

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Answer:

I hate chemistry good luck alice

The number of tablespoons of milk needed for 28 pancakes is determined as 12 tablespoons.

option C is the correct answer.

The number of the tablespoons of milk that would be needed is calculated by applying simple proportion method.

3 tablespoons of milk for 7 pancakes;

3 -----------> 7

? tablespoons of milk for 28 pancakes;

? --------------------> 28

Combine the two equations and solve for the number of tablespoons needed as follows;

? = ( 3 x 28 ) / 7

? = 12

Thus, The number of tablespoons of milk needed for 28 pancakes is determined by applying simple proportion.

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a. To calculate the amount of energy given off when 6.0 mol of CH4 is burned, we can use the given heat release per mole of methane.

Given: Heat release per mole of CH4 = 960.6 kJ/mol

Energy given off = (Heat release per mole) × (Number of moles)

Energy given off = 960.6 kJ/mol × 6.0 mol

Energy given off = 5763.6 kJ

Therefore, when 6.0 mol of CH4 is burned, 5763.6 kJ of energy is given off.

b. To calculate the energy released when 48.6 g of CH4 is burned, we need to convert the mass of CH4 to moles first.

Given: molar mass of CH4 = 16.04 g/mol

Number of moles of CH4 = (Mass of CH4) / (Molar mass of CH4)

Number of moles of CH4 = 48.6 g / 16.04 g/mol

Number of moles of CH4 ≈ 3.03 mol

Now, we can calculate the energy released:

Energy given off = (Heat release per mole) × (Number of moles)

Energy given off = 960.6 kJ/mol × 3.03 mol

The energy is given off ≈ 2915.4 kJ

Therefore, when 48.6 g of CH4 is burned, approximately 2915.4 kJ of energy is released.

c. i. The balanced equation for the reaction to produce methane (CH4) from carbon dioxide (CO2) and water (H2O), with oxygen (O2) being produced, is as follows:

CO2 + 4H2O → CH4 + 2O2

ii. To determine the amount of heat absorbed during this reaction to produce 70 g of methane, we would need the heat of formation values for CO2, H2O, and CH4. Unfortunately, the current information available does not provide those values. Without the specific heat of formation values, it is not possible to accurately calculate the heat absorbed during the reaction.

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Answer:

answer is 125

Explanation:

180-55= 125

The strong acid and strong base has high rate constant of dissociation. The rate constant for weak acid and base for the dissociation is low, they do not easily dissociate in water. Therefore, no, acid would not remain acid  if the positions of electrons and protons were swapped.

Acid is a solution which releases H⁺ hydrogen ion when dissolved in water. Base releases hydroxide ion OH⁻ ion when dissolved in water.

pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. Strength of acidic nature is directly proportional to the concentration of hydronium ion.

On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. Temperature affect the pH. At room temperature pH scale is between 0 to 14. 7 is the pH of neutral solution. No, acid would not remain acid  if the positions of electrons and protons were swapped.

Therefore, no, acid would not remain acid  if the positions of electrons and protons were swapped.

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Answer:

The difference between alchemy and modern chemistry is alchemy is based on a mystic, supernatural view of reality, whereas chemistry assumes reality is basically natural.

Explanation:

hope this helps!

Answer:

In ionic compounds, the charges of constituent ions must balance. This can be achieved by having three sodium ions per nitride ion. Therefore, the formula of sodium nitride is Na3N

Explanation:

Answer:

the charges of constituent ions must balance. This can be achieved by having three sodium ions per nitride ion. Therefore, the formula of sodium nitride is Na3N

Explanation:

Answer:

I think yes

Explanation:

sorry i havent done these type a questions in a while

Answer:

This is just my guess, but since opposites attract, then im guessing that alikes repel each other. So, they will go away from each other when the ball is released (I think).

Explanation:

Hope this helps! If it did, please mark it as brainliest! It would help a lot! Thanks! :D

Answer:

Explanation:

‘it’s a chemical change because this may seem like a decomposition reaction because it seems like the nail is decomposing and falling apart.

Answer:

the rusting of iron is a chemical change because it is two substance reacting together to make a new substance.

Explanation:

True, variations can be subtle or extreme.

The degree of variation depends on the context and the nature of the subject being examined. Some variations may be slight and difficult to detect, while others may be extreme and easily identifiable. Regardless of the extent of the variation, it is an essential concept that allows for diversity and creativity in various fields.

This is because variations refer to differences or changes in something. For instance, in genetics, variations can range from small changes in the genetic code to large-scale mutations that alter the entire genetic sequence. Similarly, in language, variations can be subtle, such as different pronunciations or word usage, or extreme, such as different languages altogether.

In other areas such as art, variations can also be subtle or extreme. For example, an artist may create variations of a painting by changing the color scheme, brushstrokes, or composition, resulting in subtle differences. Alternatively, an artist may create an extreme variation by creating a completely different piece that only shares a few similarities with the original.

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Global-scale water vapor imagery is a method that is used to detect atmospheric rivers. Water vapor is a potent greenhouse gas that absorbs and re-radiates infrared radiation, leading to warming at the Earth's surface. Water vapor is transported across the planet in a continuous cycle.

Water vapor is transported around the globe by global-scale atmospheric patterns and is mainly regulated by the Hadley Cell and other atmospheric circulation systems. Water vapor is transported from one ocean basin to another by the atmosphere's movement, which is influenced by various variables such as atmospheric pressure and temperature differences between water bodies.

Finally, the atmosphere carries water vapor between the Northern Hemisphere and the Southern Hemisphere.

All of the statements are true, so the answer is (d) All of the above are correct.

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Explanation:

For both men and women, the basics of a balanced diet are the same. Men have higher caloric requirements than women since they have a bigger body (both in height and weight) and more muscular mass.

So, Men needs more energy.

50 year old woman require less energy than 50 year old man.​

Answer:

It's true

Hope it helps:-)

Answer:

true

Explanation: