A 22.02-mL solution containing 1.615 g Mg(NO 3 ) 2 is mixed with a 28.64-mL solution containing 1.073 g NaOH. Calculate the concentrations of the ions remaining in solution after the reaction is complete. Assume volumes are additive.

The example of an ester used as a fragrance is isopentyl acetate and it is present in banana. Details about esters can be found below.

Esters are compounds most often formed by the condensation of an alcohol and an acid and has the functional group carbon-oxygen double bond joined via carbon to another oxygen atom.

Esters are naturally found in certain fruits and can be used as major constituent of perfumes. An example of ester used as fragrance is isopentyl acetate.

Isopentyl acetate has the molecular formula of C7H14O2 and has a banana flavor.

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Mammoth Cave NP contains deposits of potassium nitrate (KNO3) that were used in the past to produce saltpeter, an important ingredient in gunpowder. These nitrate deposits were exploited extensively (and virtually exhausted) to support military action during the War of 1812.

Mammoth Cave NP contains deposits of potassium nitrate (KNO3) that were used in the past to produce saltpeter, an important ingredient in gunpowder. These nitrate deposits were exploited extensively (and virtually exhausted) to support military action during the War of 1812.The park is 211.26 square kilometers in size and has approximately 400 miles of surveyed caves. The longest cave system in the world is located here.

Mammoth Cave was established in 1941 as a national park. Since then, scientists have discovered that Mammoth Cave National Park's cave system is among the most biologically diverse in the world. Mammoth Cave National Park has been designated a UNESCO World Heritage Site and a Biosphere Reserve as well. So therefore these nitrate deposits were exploited extensively (and virtually exhausted) to support military action is during the War of 1812.

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Answer:

5

Explanation:

2NaClO3 --> 2NaCl +3O2

The mole ratio of NaClO3 to O2 is 2:3.

Thus, every 3 moles of O2 require 2 moles of NaClO3 .

7 moles of O2 will, therefore require:

 = 2 x7/3

   = 4.6666 moles of NaClO3

To the nearest whole number = 5 moles of NaClO3

*phew* it's a lot of work huh

Hope this helps :)

Answer:

wheresthepicture.-

Explanation:

Answer:

don't see a picture

Explanation:

Answer:

The answer to this is simple.  

There is a school of thought that believes that natural fires are necessary.

Explanation

They are required to reduce the density of the forests that are so thick that when they eventually burn, the effects are usually catastrophic. According to one source, some of these forests are over a hundred years old. When eventually these kinds of forests catch fire, they become very hard to manage and the destruction the leave are usually worse off than if they had not been allowed to so heavy and impenetrable.  

Another reason put forward by this school of thought is that the countries who own these forests have politicised wildfires using them as an excuse to attract international funding/assistance because the fires are depleting the worlds protective greenery/earth biggest natural oxygen factory.

Cheers!

The procedure for the experiment involves measuring the volume of an object using water displacement. To begin the experiment, 25 ml of water is added to a 50-ml graduated cylinder.

The initial volume of the water is measured and recorded to the nearest 0.1 ml. Next, the object is carefully slid into the graduated cylinder, and the final volume of the water is measured and recorded to the nearest 0.1 ml. The volume of the object can be determined by subtracting the measurements taken in steps 2 and 3. To predict the final volume of an object if the initial volume is known, one could observe the pattern in the data collected from the experiment.

This would involve comparing the initial volume measurements to the corresponding final volume measurements. If there is a consistent increase or decrease in the final volume based on the initial volume, then this pattern could be used to make predictions about the final volume for future experiments. For example, if the data shows that for every 5 ml increase in initial volume, the final volume increases by 3 ml, then this pattern could be used to predict the final volume for any initial volume measurement within the range of the data collected.

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The statement that best describes the use of a chemical indicator in a titration is it must change color near the equivalence point.

Indicators are those compounds which are used in the titration process to estimate the presence of chemical entities in it.

In the titration process, indicator is added in the titration solution which changes its color when the reaction mixture goes towards the equivalence point and becomes disappear at that point.

Hence option (4) is correct.

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The given statement "Order of the reaction can be determined by looking at the coefficients in the balanced chemical equation for the reaction" is false. Because order of a reaction cannot be determined solely by looking at the coefficients in the balanced chemical equation. Option B is correct.

The order of a reaction can only be determined experimentally by measuring the rate of the reaction under different conditions, such as changing the concentrations of reactants or changing the temperature.

The rate equation obtained experimentally may or may not have the same stoichiometric coefficients as the balanced chemical equation. Therefore, it is not always possible to determine the order of the reaction based solely on the balanced chemical equation.

Hence, B. False is the correct option.

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Answer: 2C8H18 + 25O2 -> 16CO2 + 18H2O

Explanation:

Answer:

I hope this photo can help you.

The mass of 17.4 L of copper is 155.90 g. The density of the asphalt is 4.42 g/L.

To find the mass of 17.4 L of copper, we can use the formula Mass = Density x Volume. Given that the density of copper is 8.96 g/cm³, we need to convert the volume from liters to cubic centimeters (cm³) to ensure the units match. One liter is equal to 1000 cm³, so the volume of 17.4 L is 17,400 cm³. Plugging these values into the formula, we get Mass = 8.96 g/cm³ x 17,400 cm³ = 155,904 g. Rounding to two decimal places, the mass of 17.4 L of copper is 155.90 g.

Step 2: Copper has a specific density of 8.96 g/cm³, which means that for every cubic centimeter of copper, it weighs 8.96 grams. In order to find the mass of a given volume, we can use the formula Mass = Density x Volume. However, it is important to ensure that the units are consistent. In this case, the given volume is in liters, while the density is in grams per cubic centimeter. To address this, we need to convert the volume from liters to cubic centimeters. Since 1 liter is equal to 1000 cm³, we can convert 17.4 liters to cubic centimeters by multiplying it by 1000, resulting in 17,400 cm³.

By substituting the values into the formula, we have Mass = 8.96 g/cm³ x 17,400 cm³ = 155,904 g. Rounding the answer to two decimal places, we find that the mass of 17.4 L of copper is 155.90 g.

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a. While the electrode you will use is sensitive to nitrate, in practice, it is somewhat "insensitive" to the total concentration of other ions in the solution.

b. To minimize this error, a large excess of "chloride" ions was added to all samples. Adding "sodium chloride" to all samples ensures that they have the same total ion concentration, due to the dominant "sodium" and "chloride" concentrations.

The sensitivity of an ion-selective electrode to a specific ion can be influenced by the total concentration of other ions in the sample. To reduce this error, a large excess of another ion, typically chloride ions, is added to all samples to achieve the same total ion concentration.

This process is called "ionic strength adjustment" and ensures that the electrode response is only dependent on the specific ion of interest and not influenced by other ions in the sample.

The added ions are typically chosen based on their low reactivity and non-interference with the ion of interest. Ionic strength adjustment is an essential step in accurately measuring ion concentration using ion-selective electrodes.

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The aluminum sulfide (Al\(_{2}\)(SO\(_{4}\))\(_{3}\))  ) contains aluminum with a mass% of 23.7%. Option A is answer.

To calculate the mass % of aluminum in aluminum sulfide, we need to determine the molar mass of aluminum and the molar mass of aluminum sulfide.

The molar mass of aluminum (Al) is 26.98 g/mol, as indicated by its atomic mass on the periodic table.

The molar mass of aluminum sulfide (Al\(_{2}\)(SO\(_{4}\))\(_{3}\))  can be calculated by summing the molar masses of its constituent elements. The molar mass of sulfur (S) is 32.07 g/mol, and the molar mass of oxygen (O) is 16.00 g/mol. There are three sulfur atoms and 12 oxygen atoms in aluminum sulfide.

Therefore, the molar mass of aluminum sulfide is:

(2 * 26.98 g/mol) + (3 * (32.07 g/mol + 4 * 16.00 g/mol)) = 2 * 26.98 g/mol + 3 * 96.28 g/mol = 2 * 26.98 g/mol + 288.84 g/mol = 339.80 g/mol

To calculate the mass % of aluminum in aluminum sulfide, we can use the formula:

(Molar mass of aluminum / Molar mass of aluminum sulfide) * 100

(26.98 g/mol / 339.80 g/mol) * 100 = 7.9446... %

Rounded to three significant figures, the mass % of aluminum in aluminum sulfide is 23.7%. Therefore, the correct answer is Option A.

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The ATP (Available-to-Promise) for weeks 1 to 8 is the amount of inventory that a firm can commit to fulfilling customer orders within that time frame.

To calculate the ATP, you need to consider the MPS (Master Production Schedule) and the ATP calculations.

1. Start by looking at the MPS for weeks 1 to 8. The MPS represents the planned production quantities for each week.
2. Determine the beginning inventory for week 1. This is the inventory available at the start of week 1.
3. Add the MPS quantity for week 1 to the beginning inventory. This gives you the available inventory for week 1.
4. Subtract customer orders for week 1 from the available inventory. This gives you the remaining inventory after fulfilling customer orders for week 1.
5. Repeat steps 3 and 4 for each subsequent week, using the previous week's remaining inventory as the beginning inventory for the next week.
6. Continue this process until you reach week 8, calculating the available inventory and subtracting customer orders for each week.
7. The resulting values represent the ATP for weeks 1 to 8.

The ATP can fluctuate as new customer orders are received or changes are made to the MPS. Regular monitoring and adjustment of the ATP is necessary to ensure accurate order fulfillment.

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Answer:

See explanation

Explanation:

Now , we have the equation of the reaction as;

2H2S(g) + 302(g)------->2SO2(g) + 2H2O(g)

This equation shows that SO2 gas is produced in the process. Let us recall that this same SO2 gas is the anhydride of H2SO4. This means that it can dissolve in water to form H2SO4

So, when SO2 dissolve in rain droplets, then H2SO4 is formed thereby lowering the pH of rain water. This is acid rain.

The level of the solvent system is too high. If the level of the solvent system in the chamber is above the spot when the plate is inserted, the compound from the spot will dissolve in the solvent instead of migrating up the plate. You may see irreproducible results if you reuse the solvent system for several TLCs.

Answer:

A saturated solution may not be a concentrated solution IF the solute is only sparingly or slightly soluble in the solution.

Answer:

See the answer below

Explanation:

A drop of syrup would spread through water because water molecules interact and dissolve the syrup molecules and the molecules of the syrup randomly diffuse into the water from the region of higher concentration to the region of lower concentration till they become evenly distributed in the water.

Once the molecules become evenly distributed into the water, an equilibrium is established and there is no longer net movement.

Answer:

the third one

Explanation:

When you breathe in, you inhale oxygen and exhale carbon dioxide

Answer:

The three laws of Chemical Reaction are .The law of constant proportions. The law of multiple proportions. The law of reciprocal proportions.

A chemical compound is always found to be made up of the same elements combined together in the same fixed proportion by mass.

potassium and chlorine gas ---> chloride.

Hope this helps, have a good day.✌

900J energy is required to raise the temperature of from 273K to 298K.

Knowing the mass of the substance, the change in the system's temperature, and the substance's specific heat capacity will allow you to compute the quantity of heat transmitted in a given system.

Given in the question:

Specific heat capacity, c = 0.24J/\(g^{0}\)c

Mass, m = 150.0g

initial temperature, \(T_{1}\) = 273K = \(0^{0}C\)

Final temperature, \(T_{2}\) = 298K = \(25^{0}C\)

The heat absorbed (q) by the system is calculated as follows:

=> \(q = cm(T_{2}-T_{1})\)

=> \(q = 0.24J/g^{0}C \times 150.0g(25^{0}C-0^{0}C)\)

=> \(q = 900J\)

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Answer:

Sodium

Explanation:

Sodium has 11 protons. The Neutrons of an atom doesn't really matter if you already know the protons.

Answer:

1s2 2s2 2p6

Explanation:

ththe noble gas config. of neon

There are 210 kilocalories in a portion of food that contains 8 g protein, 10 g fat, and 22 g carbohydrate. The amount of vitamin C and water in the food does not contribute to the number of kilocalories, as they are not sources of energy.

Proteins are large, complex molecules that are made up of long chains of amino acids. They are essential for the growth, repair, and maintenance of tissues in the body, and are involved in a wide range of biological processes.

To calculate the number of kilocalories in a portion of food, we need to use the following formula:

Calories = (grams of protein x 4) + (grams of fat x 9) + (grams of carbohydrate x 4)

Using this formula, we can calculate the number of calories in the given portion of food:

Calories = (8 g protein x 4) + (10 g fat x 9) + (22 g carbohydrate x 4)

Calories = 32 + 90 + 88

Calories = 210 kcal

Therefore, in a portion of food that contains 8 g protein, 10 g fat, and 22 g carbohydrate there are 210 kilocalories.

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Answer:

2 NaCl + H₂SO4 → 2 HCl + Na₂SO4

a) 327.8 g of NaCl.

b)874.8 g Na2SO4

Explanation:

To balance this equation,

2NaCl + H2S04 -> 2 HCl + Na2SO4.

a)To find the mass of sodium chloride, we need to determine the limiting reactant.

275.0g H2SO4 x (1mol of H2SO4/ 98.08g of H2SO4) = 2.804 mol of H2SO4.

So we need, 2x 2.804 = 5.608 moles of NaCl to react with Sulphuric Acid. Then convert it to grams using the molar mass of NaCl,

5.608 moles of NaCl x 58.44g of NaCl/mol = 327.8 g NaCl.

b) To find how many grams of sodium sulfate are produced, we can

12.3 mol HCl × (1 mol Na2SO4 / 2 mol HCl) = 6.15 mol Na2SO4

To find the mass of Na2SO4 produced, we can use its molar mass:

6.15 mol Na2SO4 × 142.04 g Na2SO4/mol = 874.8 g Na2SO4

Therefore, 874.8 g of sodium sulfate is produced when 12.3 mol HCl is produced in this reaction.

Answer:

In every body cell

Explanation:

Answer: in every body cell

Explanation:

Life-cycle cost analysis (LCCA) is a method used to evaluate the total cost of owning, operating, and maintaining an asset or system over its entire life cycle.

Here are four advantages of LCCA compared to benefit-cost analysis (BCA):

Comprehensive Assessment: LCCA takes into account all costs associated with a project or asset, including initial investment costs, operation and maintenance costs, and disposal or replacement costs. It provides a more comprehensive and accurate picture of the total cost over time compared to BCA, which primarily focuses on initial costs and benefits.

Long-Term Perspective: LCCA considers the costs and benefits over the entire life cycle of the asset or project, which can span several years or even decades. It provides insights into the long-term financial implications and helps decision-makers make more informed choices that optimize costs over the asset's life span.

Time Value of Money: LCCA incorporates the concept of the time value of money, which recognizes that costs and benefits incurred in the future have different values compared to those in the present. LCCA uses discounted cash flow techniques to bring all costs and benefits to a common time frame, allowing for more accurate comparison and evaluation.

Risk and Uncertainty Analysis: LCCA acknowledges the inherent uncertainties and risks associated with long-term investments. It allows for sensitivity analysis, considering different scenarios, assumptions, and variables to assess the impact on the total cost. This helps decision-makers understand the potential risks and uncertainties associated with the investment and make more informed decisions.

Overall, LCCA provides a more comprehensive and accurate assessment of the total cost of an asset or project over its life cycle.

It considers all relevant costs, incorporates the time value of money, and accounts for risks and uncertainties, allowing decision-makers to make more informed choices and optimize cost-effectiveness.

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