Complete The Following Chemical Equation. 2KMnO4 + Heat ----------- + MnO2 + ----------- (2024)

Answer:

85.8 g

Explanation:

The molar mass of BaCl₂ is 208.233 g/mol, so 210.1 g is about ...

210.1/208.233 ≈ 1.009 mol

The molar mass of K is about 39.089 g/mol, so 45 g is about ...

45/39.089 ≈ 1.1509 mol

The balanced equation seems to be ...

BaCl₂ + 2K ↔ 2KCl + Ba

This reaction requires 2 moles of potassium for each mole of barium chloride, so the available potassium limits the reaction. The result is as many moles of potassium chloride as there are moles of potassium.

The 1.1509 moles of KCl, at 74.551 g/mol will have a mass of about 85.8 g.

The reaction produces 85.8 g of KCl.

Answer:

85.8 g

The grams of potassium chloride that will produce.

Answer:

Fluorine:non-metal

Bromine:non-metal

Hydrogen:non-metal

Beryllium:metal

Nitrogen:non-metal

Answer:

Mg(s)+2HCl(aq)→MgCL2(aq)+H2(g), what mass of hydrogen will be obtained if100cm3of 2.00 moldm−3HClare added to 4.86 g of magnesium?

Explanation:

Moles of metal,=4.86⋅g24.305⋅g⋅mol−1=0.200mol.

Moles ofHCl=100⋅cm−3×2.00⋅mol⋅dm−3=0.200mol

Clearly, the acid is indeficiency; i.e. it is thelimiting reagent, because the equation above specifies that that 2 equiv of HCl are required for each equiv of metal.

So if0.200molacid react, then (by the stoichiometry), 1/2 this quantity, i.e.0.100molof dihydrogen will evolve.

So,0.100moldihydrogen are evolved; this has a mass of0.100⋅mol×2.00⋅g⋅mol−1=??g.

If 1 mol dihydrogen gas occupies24.5dm3at room temperature and pressure, what will be the VOLUME of gas evolved?

sana maka tulong po

Answer:

my sister said that the answer would be letter b

she is mostly right but she was a lil stumped at this question

Explanation:

Answer:

The kinetic theory of matter (particle theory) says that all matter consists of many, very small particles which are constantly moving or in a continual state of motion. The degree to which the particles move is determined by the amount of energy they have and their relationship to other particles.

Explanation:

Explanation:

Composition of Stainless Steel

Steel is an alloy of iron and carbon. Stainless steels are steels containing at least 10.5% chromium, less than 1.2% carbon and other alloying elements

Answer:

carbon, nitrogen,oxygen,flourine

Answer:

9√3

Explanation:

Given that :

UV = 18

Angle V = 60°

To obtain the measure of UW = v

Using trigonometry :

Sinθ = opposite / hypotenus

Sinθ = UW / 18

θ = 60°

sin60° = UW / 18

Sin 60° = √3/2

√3 /2 = UW / 18

UW = 18 * √3/2

UW = 9 * √3

UW = 9√3

Answer:

The chemical reactions in which oxidation and reduction takes place are called redox reaction.

Explanation:

CH4. + O2----> CO2. + H2O

Answer:

a) water molecules move rapidly in the mug of boiling water while they move slowly in the ice water. In the ice itself, the molecules stay in place.

b) Water must release energy to move from a higher to lower energy phase, i.e., from gas (water) vapor to liquid during condensation and from liquid to solid (ice) during freezing. In each case, the energy released by the water results in a change in the internal molecular bonding structure.

Explanation:

Answer:

For the reaction

2

H

2

+

O

2

→

2

H

2

O

, how many moles of water can be produced from 6.0 mol of oxygen?

Chemistry Mole Ratios

1 Answer

Stefan V.

Dec 5, 2015

12 moles H

2

O

Explanation:

Your tools of choice for stoichiometry problems will always be the mole ratios that exist between the chemical species that take part in the reaction.

As you know, the stoichiometric coefficients attributed to each compound in the balanced chemical equation can be thought of as moles of reactants needed or moles of products formed in the reaction.

In your case, the balanced chemical equation for this synthesis reaction looks like this

2

H

2(g]

+

O

2(g]

→

2

H

2

O

(l]]

Notice that the reaction requires

2

moles of hydrogen gas and

1

mole of oxygen gas to produce

2

moles of water.

This tells you that the reaction produces twice as many moles of water as you have moles of oxygen gas that take part in the reaction.

You know that your reaction uses

6.0

moles of oxygen. Assuming that hydrogen gas is not a limiting reagent, you can say that the reaction will produce

6.0

moles O

2

⋅

2

moles H

2

O

1

moles O

2

=

12 moles H

2

O

Answer:

kilogram

Explanation:

Answer:

kg......................

Answer:

B) Upper right corner

Explanation:

Usually the metals are situated on the left and the non-metals are located on the Upper right corner.

Hope it helps :)

Answer:

Upper Right

Explanation:

Answer:

You need to know the weight in lb of 1 apple (or how manly apples there are in a 1 lb bag of apples)

Explanation:

Option a) presents the price for unit of apple: 10 apples for $10.50. So, the price of 1 apple is calculated as $10.50/10 = $1.05

Option b) presents the price for weight of a bag of apples: 3 lb bag of apples for $5.00. So, the price for 1 lb bag of apples is $5.00/3 = $1.66/lb. But we don't know how many apples there are in a 1 lb bag.

If we knew the approximate weight in lb of an apple, we would know how many apples there are in a 1 lb bag and then we can compare with the price for unit (option b vs option a). For example, if there is 1 apple in a 1 lb bag, option b) is more expensive than option a) ⇒ $1.66/apple > $1.05/apple

Answer:

magnesium

Explanation:

fluorine

Answer:

Constellations Changing Positions!!!! :D <----(smiley face)

Explanation:

Due to the earth's rotation, stars appear to move. As the Earth rotates from west to east, the stars appear to rise in the East, moving across south to set in the west. The Sun will appear to move through the stars, making one complete circuit of the sky in 365 days!!

(yes i'm literally 9+6 years old and idek why i'm doing this XD )

Answer:

Constellations Changing Positions. Due to the earth's rotation, stars appear to move. As the Earth rotates from west to east, the stars appear to rise in the East, moving across south to set in the west. The Sun will appear to move through the stars, making one complete circuit of the sky in 365 days.

Explanation:

(Found this online, hope it helps!)

Answer:

products

Explanation:

when chemicals react new substances are created called PRODUCTS

Answer:

the _products_ are new substances that are created by following a chemical reaction.

Explanation:

^^

Answer:

molecules heat and move faster, they are moving apart. So air, like most other substances, expands when heated and contracts when cooled.

Explanation:

Because there is more space between the molecules, the air is less dense than the surrounding matter and the hot air floats upward.

Answer:

ugh what do you mean

Explanation:

Answer:

Where is the graph?

Explanation:

Answer:

The chromatogram shows that all three samples have at least one substance in common is described below in detailed explanation.

Explanation:

Chromatography is a process of distributing compounds by applying a changing solution on pure paper. A droplet of the compound solvent is recognized near one edge of the paper and then drained. The edge of the paper, closest to the point, is then drawn into the solution without submerging the place itself.

Answer:

SnO2

Explanation:

The limiting reactant is the reactant that runs out first during a chemical reaction.

Reactants are on the left side of the reaction, so SnO2 and H2. They tell us in the question that there is "excess" hydrogen (H2), so we know there is plenty of it, as "excess" means "more than enough." If we have more than enough hydrogen, then we know that we will run out of SnO2 first.

:)

Answer:SnO2

Explanation:

There are three ways nitrogen can be fixed to be useful for living things: Biologically: Nitrogen gas (N2) diffuses into the soil from the atmosphere, and species of bacteria convert this nitrogen to ammonium ions (NH4+), which can be used by plants.

Hope this helps!

Answer:

Many human activities have a significant impact on the nitrogen cycle. Burning fossil fuels, application of nitrogen-based fertilizers, and other activities can dramatically increase the amount of biologically available nitrogen in an ecosystem.

Explanation:

Nitrogen is converted from atmospheric nitrogen (N2) into usable forms, such as NO2-, in a process known as fixation. The majority of nitrogen is fixed by bacteria, most of which are symbiotic with plants. Recently fixed ammonia is then converted to biologically useful forms by specialized bacteria.

Answer:

Potassium permanganate has a molar mass of 158.04 g/mol. This figure is obtained by adding the individual molar masses of four oxygen atoms, one manganese atom and one potassium atom

Explanation:

Answer:

A

Explanation:

when certain chemical reactions are occurring, heat is evolved and that is what is termed exothermic reaction.