8. (a) What is an acid-base indicator?​

The mass of oxygen gas produced, given that 15.8 g of potassium permanganate is heated until no more oxygen gas is given off is 1.6 g

From the question given, the following data were obtained:

The mass of oxygen gas produced from the reaction can be obtained as follow:

Mass of potassium permanganate = Mass of remaining substance + mass of oxygen

Inputting the given parameters, we have:

15.8 = 14.2 + mass of oxygen

Collect like terms,

Mass of oxygen = 15.8 - 14.2

= 1.6 g

Thus, we can conclude that the mass of oxygen gas produced from the reaction is 1.6 g

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The pools of nitrogen (N) in the nitrogen cycle are: atmosphere (N2 gas), soil, water bodies, living organisms (plants and animals), and organic matter (such as decaying plants and animal waste). N flux can impact ecosystems, such as fisheries in the Gulf, through eutrophication and hypoxia.

The fluxes of N in the nitrogen cycle are: nitrogen fixation (conversion of N2 gas into forms that can be used by plants), nitrification (conversion of ammonium into nitrite and nitrate), assimilation (incorporation of nitrate and ammonium into plant tissues), denitrification (conversion of nitrate back into N2 gas), and ammonification (conversion of organic nitrogen into ammonium).

The sources of N flux include natural processes (e.g. biological nitrogen fixation, weathering of rocks), human activities (e.g. fossil fuel combustion, use of synthetic fertilizers), and agricultural practices (e.g. livestock waste, irrigation).

N flux can impact ecosystems, such as fisheries in the Gulf, in several ways. Excessive nitrogen inputs from human activities can lead to eutrophication, causing algal blooms that deplete oxygen and harm fish and other aquatic organisms. This can disrupt the food web and decrease fish populations. Additionally, nitrogen runoff from agricultural areas can contribute to hypoxia (low oxygen) zones, further affecting fisheries.

In conclusion, the nitrogen cycle involves pools such as the atmosphere, soil, water bodies, living organisms, and organic matter. Fluxes include nitrogen fixation, nitrification, assimilation, denitrification, and ammonification. Sources of N flux include natural processes and human activities.

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No, not all of "a" would dissolve in 1.0 mL of water at 80°C. The solubility of a substance depends on its nature and the temperature of the solvent.

Some substances are more soluble at higher temperatures, while others are less soluble. Without knowing the specific substance "a" and its solubility at 80°C, it is impossible to accurately predict if all of it would dissolve in 1.0 mL of water at that temperature. However, generally speaking, 0.1 g of a substance is unlikely to completely dissolve in just 1.0 mL of water at any temperature.

Solubility refers to the ability of a substance, known as the solute, to dissolve in another substance, known as the solvent, to form a homogenous mixture called a solution. The solubility of a substance is typically expressed in terms of the maximum amount of solute that can dissolve in a given amount of solvent under certain conditions such as temperature, pressure, and concentration.

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Monosaccharides and disaccharides dissolve in water because they have hydrophilic groups, which form hydrogen bonds with water molecules.

This allows the sugar molecules to be surrounded by water molecules, and therefore dissolve in water.Water is a polar solvent and therefore interacts well with other polar solutes. Hydrophilic groups found in both monosaccharides and disaccharides such as hydroxyl groups and carbonyl groups (C=O) are soluble in water, making these sugar molecules soluble in water.

Because the solubility of any substance is dependent on the polarity of the solvent and solute, it is the presence of the hydrophilic groups found in sugars that allows them to dissolve in water. This allows the sugar molecules to be surrounded by water molecules, and therefore dissolve in water.Water is a polar solvent and therefore interacts well with other polar solutes.

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Half life period for the reaction where deduction of mass takes places is 8 days.

Half life period of any reaction is that time where half concentration of reactant get converted into product.

Here we can calculate the half life through the below equation:

\($m = {m^'} \times {\left( {\frac{1}{2}} \right)^{\frac{t}{T}}}$\)

where, m' = initial mass of iodine = 80g

m = remaining mass = 2.5g

t = taken time = 40 days

T = half life

By putting this all value in above equation, we get

\(.$\begin{array}{l}2.5 = 80 \times {\left( {\frac{1}{2}} \right)^{\frac{{40}}{T}}}\\\frac{{2.5}}{{80}} = {\left( {\frac{1}{2}} \right)^{\frac{{40}}{T}}}\\{\left( {\frac{1}{2}} \right)^5} = {\left( {\frac{1}{2}} \right)^{\frac{{40}}{T}}}\\5 = \frac{{40}}{T}\\T = 8\end{array}$\)

Hence, half life period of this reaction is 8 days.

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Answer:

The mass of lithium hypochlorite are 34.7 grams.

Explanation:

Moles of = 0.594 g. Molar mass of = 58.4 g/mol.

Answer:

Volume versus temperature, because they are also directly proportional

Explanation:

The Ideal Gas Equation is :

Evaluating the options

The inflation rate from 2014 to 2015, assuming 2014 as the base year, is 68.09%.

The inflation rate from 2014 to 2015, assuming that 2014 is the base year, can be determined using the Consumer Price Index (CPI). The CPI measures the cost of goods and services over time and is used to calculate inflation. The formula for calculating inflation rate using CPI is as follows: Inflation rate = ((CPI year 2 - CPI year 1) / CPI year 1) x 100To solve this problem, we first need to calculate the CPI for each year using the prices and quantities of nuts and meat.

Calculating CPI for 2014:CPI 2014 = (300 x $9) + (175 x $19) = $5,625 Calculating CPI for 2015:CPI 2015 = (420 x $9) + (340 x $14) = $9,460Using the CPI formula, we can calculate the inflation rate from 2014 to 2015:Inflation rate = ((CPI 2015 - CPI 2014) / CPI 2014) x 100= (($9,460 - $5,625) / $5,625) x 100= $3,835 / $5,625 x 100= 68.09% (to 2 decimal places) Therefore, the inflation rate from 2014 to 2015, assuming 2014 as the base year, is 68.09%.

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An acid can be defined as a substance that loses one or more H+ ions when dissolved in water. An H+ ion is a hydrogen atom that has lost an electron and is therefore just a proton. The H+ ion is not an isolated ion but interacts strongly with H2O to produce hydronium ion, which has the formula H3O+

An acid can be defined as a substance that loses one or more H+ ions when dissolved in water. An H+ ion is a hydrogen atom that has lost an electron and is therefore just a proton. The H+ ion is not an isolated ion but interacts strongly with H2O to produce hydronium ion, which has the formula H3O+.Hydronium ion (H3O+) is the product when a proton (H+) is transferred to a water molecule (H2O).

The H+ ion interacts with the lone pair of electrons on the oxygen atom of the water molecule to form a hydronium ion. The resulting hydronium ion has a tetrahedral molecular geometry, with the oxygen atom at the center and the three hydrogen atoms at the corners. The presence of hydronium ions is what gives acidic solutions their characteristic sour taste and ability to conduct electricity.

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Answer:

what's different about the particles in her hand are that for one are a solid in contrast to the ice cream which is partially liquid.

When an electron moves from the second energy level to the third energy level and then back to the second energy level energy is absorbed and then released to form an emission line.

Energy is absorbed and then released to form an emission line.

As an electron passes from the second to the third energy level before returning to the second, according to the Bohr model of an atom, energy is absorbed and then released to form an emission line. Electrons in the Bohr model of the atom travel in circular orbits around the nucleus.

Electrons orbit the nucleus at constant energy levels. At greater energy levels, orbits further from the nucleus exist. When electrons return to a lower energy level, they emit light energy.

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Answer:

C. Energy is absorbed and then released to form an emission line.

Explanation:

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Answer:

Explanation:

Dado que:

masa de oxígeno gaseoso = 100 g

presión = 1 atm

temperatura = 273 K

(a)

número de moles de oxígeno contenidos en el matraz = masa de oxígeno / masa molar de oxígeno

= 100 g / 16 gmol⁻¹

= 6.25 moles

(b) El número de moléculas de oxígeno es el siguiente:

Dado que 1 mol de oxígeno gaseoso contiene 6.023 * 10²³ moléculas de oxígeno.

Entonces, 6.25 moles contendrán:

= (6.25 ×  6.023 * 10²³) moléculas de oxígeno.

≅ 3.764 × 10²³ moléculas de oxígeno.

(c) El número de átomos de oxígeno es:

= 2 × 3.764 × 10²³

= 7.528 × 10²³ átomos de oxígeno

(d) Usando la ecuación de gas ideal

PV = nRT

El volumen ocupado por el oxígeno = \(\dfrac{nRT}{P}\)

Volumen ocupado por oxígeno = \(\dfrac{ 6.25 * 8.314 *273}{1}\)

Volumen ocupado por oxígeno= 14185.76 m³

Answer:

Explanation:chlorine

Given that sulfur's atomic mass is 32.07 amu, the isotope most likely in greatest abundance is S-32 option (A). What is an isotope? An isotope is a separate nuclear species of the same given element, having the same atomic number and occupying the same position on the Periodic table, but differing in nucleon number due to change in number of neutrons.

Stable isotopes of the element are non-radioactive and do not decay. These isotopes are stable as their proton to neutron ratio is high. The atomic number of sulfur is 16, implying that there are 16 protons. For each of the options, the number of neutrons would be: (Atomic mass- atomic number):

A. 32-16=16

B. 34-16= 18

C. 36-16= 20

D. 33-16= 17

The proton to neutron ratio is lowest for S-32, which is 1. This makes it the most stable isotope, and hence the most abundant in nature.  

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The formation of solid magnesium chloride (MgCl₂) by the reaction between chlorine gas (Cl₂) and magnesium metal (Mg) at high temperatures is classified as a synthesis reaction or a combination reaction.

Synthesis reactions involve the combination of two or more substances to form a single product. In this case, chlorine gas and magnesium metal combine to produce magnesium chloride as the sole product.

The balanced chemical equation for this synthesis reaction is:

Mg + Cl₂ ⇒ MgCl₂

Hence, the reaction between chlorine gas and magnesium metal to form solid magnesium chloride indicates a synthesis reaction, as the elements combine to form a compound.

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Dr. Peterson performed an experiment in order to research the growth rate of mice. He had two groups of mice and he fed one group a type of food with added chemical which results in increasing the growth rate and fed same group of food to another batch without adding any chemicals. His research conveyed that chemical A increased the growth rate of mice by approximately 30%. He performed the same experiment 4 times and got the same result every time. Dr. Peterson concluded that the chemical A results in increase of growth rate of mice. The Interpretation of Dr. Peterson's experiment was supported by the evidence received from his experiment. Therefore, option C is correct.

In his experiment, Dr. Peterson found out that chemical A results in increasing the growth rate of mice by 30% and to make sure that the result obtained is valid and evidential, he performed the same experiment 4 times. Since every time the experiment was repeated, the result came out to be same, the closing statement from his experimental study can be accepted because they are backed by evidence.

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Answer:

Part 1: 229.95g

Part 2: 598.5g

Part 3: 12.6g

Explanation:

Note: I learned this last week. Answer not sure.

Pls tell me if i got it right or wrong.

Mg + HCl - > MgCl2 + H2

First, balance the equation.

There is only 1 H and 1 Cl at the left side. BUT there are 2 Cl and 2 H at the right side. So you can add a 2 in front of HCl to balance it.

Mg + 2HCl - > MgCl2 + H2

Formula 1: (n= m/mr)

n = moles, m= mass, mr = molecular mass

Formula 2: (n= v/24)

v = volume

Part 1

What mass of HCl is consumed by the reaction of 3.15 mol of magnesium?

Ratio of

(look at the number in front of each)

2HCl : Mg

2 : 1

(3.15 x 2) : 3.15 moles

6.3 moles : 3.15 moles

So 2HCl has 6. 3 moles

Now use formula 1 (n = m/mr)

Calculate molecular mass of HCl

Check your periodic table

mr of HCl =(1 + 35.5) = 36.5

6.3 = m/36.5

m = 229. 95grams

Part 2

What mass of MgCl2 is produced? Answer in units of g.

Ratio of

2HCl : MgCl2

(1 +35.5) : (24+35.5x2)

36.5: 95

229.95g :?

229.95g : 598.5g

m = 598.5g

Part 3

What mass of H2 is produced? Answer in units of g.

2HCl : H2

36.5 : 2

229.95g :?

229.95g : 12.6g

m = 12.6g

In this case, the partial pressures of nitrogen (N2), oxygen (O2), and helium (He) are given as 219 torr, 106 torr, and 244 torr, respectively. The total pressure of the gas mixture is 569 torr.

The total pressure of a gas mixture is the sum of the partial pressures of its individual components. In this case, the partial pressures of nitrogen (N2), oxygen (O2), and helium (He) are given as 219 torr, 106 torr, and 244 torr, respectively.

To find the total pressure, we simply add these partial pressures together:

Total pressure = Partial pressure of N2 + Partial pressure of O2 + Partial pressure of He

            = 219 torr + 106 torr + 244 torr

            = 569 torr

Therefore, the total pressure of the gas mixture is 569 torr.

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Answer:

the answer is the location of the WORLD is the same as the answer to the answer

Answer:

0.116 moles of ammonia can be produced from the reaction of 4.0 liters of hydrogen at 50.0°C and 1.2atm of pressure with excess nitrogen.

Explanation:

The balanced chemical equation for the reaction of hydrogen and nitrogen to form ammonia is:

N2(g) + 3H2(g) → 2NH3(g)

To determine how many moles of ammonia can be produced from the reaction of 4.0 liters of hydrogen at 50.0°C and 1.2atm of pressure with excess nitrogen, we need to use the ideal gas law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

First, we need to convert the volume of hydrogen gas to moles using the ideal gas law equation:

n = PV/RT

where P is the pressure in atm, V is the volume in liters, R is the gas constant (0.0821 L·atm/mol·K), and T is the temperature in Kelvin.

n = (1.2 atm)(4.0 L)/(0.0821 L·atm/mol·K)(50.0°C + 273) = 0.174 mol H2

Since there is excess nitrogen, all of the hydrogen will react to form ammonia. Using the mole ratio between NH3 and H2 from the balanced chemical equation:

2 mol NH3 / 3 mol H2

we can calculate how many moles of NH3 will be produced:

n(NH3) = (0.174 mol H2) × (2 mol NH3 / 3 mol H2) = 0.116 mol NH3

Therefore, 0.116 moles of ammonia can be produced from the reaction of 4.0 liters of hydrogen at 50.0°C and 1.2atm of pressure with excess nitrogen.

When the temperature of a sample of propane gas is raised from 27.0°C to 42.0°C, and at the same time the pressure is decreased by 5.0%, the new pressure can be calculated as 0.95 times the initial pressure.

Let's assume the initial pressure of the propane gas is P. The decrease in pressure is calculated by multiplying the initial pressure (P) by the percentage decrease of 5.0%. This gives us a decrease in pressure of 0.05P.

To find the new pressure, we subtract the decrease in pressure from the initial pressure:

New pressure = Initial pressure - Decrease in pressure = P - 0.05P = 0.95P

Therefore, the new pressure is 0.95 times the initial pressure after the 5.0% decrease.

The change in temperature is given as 15.0°C, which represents the difference between the final temperature (42.0°C) and the initial temperature (27.0°C).

It's important to note that the problem states that propane gas can be treated as an ideal gas at temperatures above its boiling point of -42.0°C.

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Coltan, lumber and fossil fuels are all part of the resources that exists in the environment.

The term resources refer to those materials that we extract from the environment that can be used or our good. These resources could include minerals or energy raw materials.

However, coltan, lumber and fossil fuels are all part of the resources that exists in the environment.

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Answer B A B A

Explanation:

i got it right

Answer:

70 mL

Explanation:

To solve this problem we can use the C₁V₁=C₂V₂ equation, where the subscript 1 refers to the concentrated solution while subscript 2 refers to the diluted one, as follows:

We input the data:

And solve for x:

Thus the answer is 70 mL.

The feature that is NOT a part of Thompson's 'Raisin Pudding' model of the atom is a), the presence of a nucleus.

In this model, the electrons are dispersed throughout the atom (b), held in place by the positive charges in the atom (c) and the positive charge is also dispersed in a cloud about the atom (d). However, this model does not take into account the presence of a nucleus, which was later discovered by Rutherford. The nucleus is a central, positively charged region in the atom that contains most of the atom's mass.

It was discovered through the gold foil experiment where alpha particles were shot at a thin sheet of gold foil and it was observed that some particles were deflected. This led to the conclusion that the positively charged alpha particles were repelled by a dense, positively charged region in the atom which was later identified as the nucleus. Hence, Thompson's model does not include the presence of a nucleus which is a key feature of modern atomic theory.

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Answer:

directly proportional

Explanation:

have a good day

Answer:

Unbalanced is the answer

Answer:

125g

Explanation:

you simply add the masses together

Answer:

The two main variables in an experiment are the independent and dependent variable. An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.

Explanation:

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