a reaction of heating patassium permanganate produces potassium manganate, manganese dioxide and oxygen gas. Heat 15.8 g potassium permanganate until no more oxygen gas is given off. The remaining material has a mass of 14.2 g. What mass of oxygen gas was produced in the reaction?

Based on the concentrations given, the volume of vinegar required is 5.04 mL.

The concentration of a solution is the amount of solute in a given volume of solution.

Concentration can be expressed as:

The concentration of the vinegar solution is 4.76% (w/w). This means that 4.76 g of vinegar is present in 100 g of solution.

Mass of vinegar = 4.76 g

molar mass if vinegar = 60 g/mol

moles of vinegar = 4.76/60 = 0.0793 moles

volume of solution/water = 100 mL or 0.1 L

Molarity of vinegar = 0.0793/0.1 = 0.793 M

1 mole of vinegar reacts with 1 mole of NaOH

let the volume of vinegar required be V

0.793 M × V = 40 × 0.1

V = 4/0.793

V = 5.04 mL

Therefore, the volume of vinegar require is 5.04 mL.

Learn more about molarity at: https://brainly.com/question/26528084

Compared to other common sugars, The sweetest-tasting simple carbohydrate in the diet is fructose

A naturally occurring sugar called fructose can be found in a variety of fruits, vegetables, and honey.

Compared to other common sugars like glucose and sucrose (table sugar), it is sweeter.

Fructose is quickly absorbed into the bloodstream after consumption and can serve as a quick source of energy.

Due to its extreme sweetness, it is frequently employed as a sweetener in many processed foods and beverages.

High-fructose corn syrup is a commercial sweetener with a considerable fructose content that is frequently used in sodas and other sweetened beverages.

Therefore, fructose is the sweetest simple carbohydrate.

Option C) fructose is the correct answer.

Learn more about Fructose here: https://brainly.com/question/28117000

#SPJ4

The answer is System.

When a scientific investigation is in progress, its used to perform and understand the natural phenomenon that goes on using the scientific method. Since this is a descriptive investigation, it provides a descriptive account of any system by looking at it without any prior knowledge to that subject. This method of investigation does not use a hypothesis. Thus, proves our answer correct.

Best of Luck!

Answer:

The answer is System.

Explanation:

When a scientific investigation is in progress, its used to perform and understand the natural phenomenon that goes on using the scientific method. Since this is a descriptive investigation, it provides a descriptive account of any system by looking at it without any prior knowledge to that subject. This method of investigation does not use a hypothesis. Thus, proves our answer correct.

Answer and Explanation:

In H2O molecules, due to formation of intermolecular hydrogen bonds, there is molecular association. Large amount of energy is required to break these intermolecular hydrogen bonds. Intermolecular hydrogen bonding is not possible in H2S. Hence, its boiling point is lower and is a gas.

Answer:

38 g?

Explanation:

I'm not entirely sure, but perhaps it is 49 grams x 78.25%? This gives you an answer of 38 g using significant figures.

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

NADH carries electrons and hydrogens to the electron transport chain.

The main role of NADH and FADH₂ is to donate electrons and hydrogen to the electron transport chain. NADH stands for Nicotinamide Adenine Dinucleotide (NAD) + Hydrogen (H). It also plays an important role of generating energy in the body. During the electron transport chain both NADH and FADH₂ donate electrons by providing hydrogen molecules to the oxygen molecules to create water. Both Kreb's cycle and glycolysis produces NADH.

The NADH that are produced by the body are used for generating energy for the body. Supplements are also taken for NADH but they have some side effects like blood pressure and other effects.

Learn more about NADH from the link given below.

https://brainly.com/question/2484776

#SPJ1

(a). First, we need to identify the limiting reactant. Let's calculate the number of moles of each reactant:

For salicylic acid, we have that its molar mass is 138.1 g/mol (you can calculate it using the periodic table and doing the algebraic sum):

And now, let's see the number of moles of 17.7 g of acetic anhydride, where its molar mass is 102.1 g/mol:

Now, you can realize that in the reaction 2 moles of salicylic acid react with 1 mol of acetic anhydride. Let's see how many moles of acetic anhydride requires to react with 0.19 moles of salicylic acid:

You can realize that we obtained less number of moles for acetic anhydride, meaning that the acetic anhydride is in excess and the salicylic acid is the limiting reactant, so we're going to work with this compound to find how many grams of aspirin is produced:

In the chemical equation, 2 moles of salicylic acid reacted produces 2 moles of aspirin, so the mole ratio between these two is 1:1 which is telling us that 0.19 moles of salicylic acid are producing 0.19 moles of aspirin. With this value, we can calculate the mass of aspirin as our theoretical yield. The molar mass of aspirin is 180.2 g/mol:

Remember that the theoretical yield is the amount that we expect to get in the reaction, in this case, is 34.24 grams of aspirin.

(b). Let's see the formula for percent yield:

where the actual amount of product is what we obtained from the reaction, in this case, 30.7 grams of aspirin and the theoretical yield that we've already found (34.24 g). Replacing these values, we're going to have:

The percentage yield of the experiment is 89.66%.

Answer:

The number of protons in an atom is called its atomic number. This number is very important because it is unique for atoms of a given element. All atoms of an element have the same number of protons, and every element has a different number of protons in its atoms.

Explanation:

Hope this helped!

Answer:

HCl acts as an excess reagent

Explanation:

The reaction equation is;

PbO + 2HCl → PbCl2 + H20

Number of moles of PbO = 13g/223.2 g/mol = 0.058 moles

Since the mole ratio is 1:1, 0.058 moles of PbCl2 is produced

Number of moles of HCl = 6.4 g/36.5g/mol = 0.175 moles

2 moles of HCl yields 1 mole of PbCl2

0.175 moles yields 0.175 moles * 1/2

= 0.0875 moles of PbCl2

Hence; PbO yields the least number of moles of product so it is the limiting reactant and HCl is the reactant in excess

Researchers must update their chemical inventory annually in the eh&s chemical inventory database.

It is important to update and maintain the chemical inventory records annually.

For safety purposes, researchers must maintain the data in a well-organized, well-planned, and systematic manner.

In addition to this, the chemical inventory data must be upgraded every month if any significant changes occur in the inventory.

The necessary precautions must be adopted if any of these changes happen such as room relocation, the addition of new chemical materials, or changes in name, address or phone numbers.

If you need to learn more about chemicals click here:

https://brainly.com/question/26487468

#SPJ4

An ionic equation for the displacement reaction between copper ions and iron: Cu²⁺(aq) + Fe(s) → Cu(s) + Fe²⁺(aq)

In this chemical reaction, there is a transfer of electrons from iron (Fe) to copper (Cu).

Iron change oxidation number from 0 to +2 (loose electrons) and copper change oxidation number from +2 to 0 (gain electrons).

Oxidation half reaction: Fe⁰ → Fe²⁺ + 2e⁻.

Reduction half reaction: Cu²⁺ + 2e⁻ → Cu⁰.

Oxidation is increase of oxidation number.

Reduction is lowering oxidation number because atom gain electrons.

(aq) is an aqueous solution.

(s) is a solid, insoluble in the water.

More about oxidation: brainly.com/question/157342

#SPJ4

Answer:

Difference in temperature.

Explanation:

Conduction is the movement of heat energy through a substance or from one substance to another by direct contact of atoms and molecules. Heat moves directly from one molecule to another. The heat energy speeds up the movement of the atoms and they collide with other molecules setting them into faster motion.

Answer:

This all should be correct:

c

a

c

a

Answer:

C, A, B, B

Explanation:

Question 1: C. inner core

Why? Because the inner core is literally the center of the Earth. Meaning it is the hottest part of the Earth.

Question 2: A. crust

Why? The crust is the outer most layer which is the layer we walk on so to speak. The Earth can be broken up into four layers and as said before the crust is the outer part of it. It is actually amounts to less than 1% of Earth's volume.

Question 3: B. basalt

Why? If we were to average the oceanic crust we would get something around six kilometers and this is the thickness. This is mostly made up of basalt.

Question 4: B. outer core

Why? Due to difference in pressure and temperature the outer core tends to release dense matter which sinks while warm (less dense rises). This causes the Coriolis force, resulting from the Earth's rotations.

Answer:

CaC2 + 2H2O → C2H2 + Ca(OH)2

thats it

Explanation:

Answer: D. Potassium

Explanation:

A. Salad- a mixture of vegetables or fruits❌

B. Sugar- a compound made up of many elemnts❌

C. Water-  a molecule made up of two elements (water and hydrogen)❌

D. Potassium- the only pure element of the options provided.✅

Answer:

D, potassium

Explanation: took test ! btw

Pulp

distillation

chromatography

Acetone is captured and cooled.

Substance A is rice, and substance B is sugar.

To separate the components of a mixture the substances to be separated must differ in a given physical property.

In chemistry, there are diverse separation techniques used to separate the components of a mixture. Separation depends on differences in a given physical property such as boiling point, solubility in a solvent, difference in particle size etc.

Filtration can be used to separate a solid from a liquid hence it can be used to separate pulp from orange juice.

To separate water and alcohol, distillation is used because such a separation depends on the difference in the boiling points of water and alcohol. Water boils at a higher temperature than alcohol hence the mixture can be separated by distillation.

Chromatography is a method of separation that is dependent on how quickly a the components of a  mixture move through a stationary phase.

Acetone has a lower boiling point than water hence it collected first and cooled before water.

Clearly, substance A must be a solid since it is filtered out after adding water. Substance B must be a water soluble substance which can be recovered from water by evaporation to dryness. Hence substance A is rice, and substance B is sugar.

https://brainly.com/question/11960023

CaO(s) + SO3(g) → CaSO4(s)

Balanced equation:

CaO(s) + SO3 => CaSO4(s)

It is already balanced.

A balanced reaction obeys the law of conservation of mass. According to the law of conservation of mass, mass can neither be created nor be destroyed. The balanced reaction is CaO(s) + SO₃(g) → CaSO₄(s).

A chemical equation in which number of atoms of reactants and products on both sides of the equation are equal is defined as the balanced chemical equation. The amount of reactants and products on both sides of the equation are equal.

The numbers which are used to balance the chemical equation are called the coefficients. The coefficients are added before the formula or chemical symbols. They are essential to balance a reaction.

Here the equation CaO(s) + SO₃(g) → CaSO₄(s), is already balanced. Since the number of 'Ca', 'O', and 'S' on both sides of the equation are equal. So it is a balanced one.

To know more about balanced equation, visit;

https://brainly.com/question/29769009

#SPJ2

Answer:

yields Carbon Dioxide and Water

Explanation:

Clouds will form due to more water vapor in the air

Answer:

A

Explanation:

Answer: The final volume of this solution is 0.204 L.

Explanation:

Given: Molarity of solution = 2.2 M

Moles of solute = 0.45 mol

Molarity is the number of moles of solute present divided by volume in liters.

\(Molarity = \frac{no. of moles}{Volume (in L)}\)

Substitute the values into above formula as follows.

\(Molarity = \frac{no. of moles}{Volume (in L)}\\2.2 M = \frac{0.45}{Volume}\\Volume = 0.204 L\)

Thus, we can conclude that the final volume of this solution is 0.204 L.

Answer:

There are two sets of groups in the periodic table. The first set are Group A elements and are also known as representative elements. The second set are Group B elements and are also known as transition metals. Representative elements are the most abundant elements on earth.

Answer:

covalent bonds

Explanation:

Answer:

The chemical formula for the ionic compound is

Na3N3

The three states of matter are solid - example is stone, liquid - example is water and gas - example is air.

A matter is referred to as a substance which has a certain mass and takes up a certain volume in space.

For example pen, pencil, toothbrush, water, milk are matters as well as car, bus, bicycle is also a matter. So matter is considered as a living thing and a non-living thing.

There are three states of matter and they include;

They have different properties, which can be explained by looking at the arrangement of their particles. This is the theoretical temperature at which particles have the least amount of energy and the slowest movement.

Learn more about states of matter here: https://brainly.com/question/9402776

#SPJ1

Answer:

no ablo inglés porfavor amigos

Therefore, the mass of 9.03 x 10^23 atoms of S is approximately 48.11 g.

So, the answer is (B) 48.1 g S.

What is Molar Mass?

Molar mass is the mass of one mole of a substance, usually expressed in grams per mole (g/mol). It is calculated by adding up the atomic masses of all the atoms in a molecule. Molar mass is a useful concept in chemistry because it allows chemists to convert between mass, moles, and number of particles.

To find the mass of 9.03 x 10^23 atoms of S, we first need to find the number of moles of S in 9.03 x 10^23 atoms:

1 mole of S contains 6.022 x 10^23 atoms of S (Avogadro's number).

So, the number of moles of S in 9.03 x 10^23 atoms of S is:

9.03 x 10^23 atoms / 6.022 x 10^23 atoms/mol = 1.50 mol

Next, we can use the molar mass of S to convert moles to grams:

1.50 mol x 32.07 g/mol = 48.11 g

Therefore, the mass of 9.03 x 10^23 atoms of S is approximately 48.11 g.

So, the answer is (B) 48.1 g S.

Learn more about Molar Mass from given link

https://brainly.com/question/30459977

#SPJ1