Problem PageQuestion Iron(III) oxide and hydrogen react to form iron and water, like this: (s)(g)(s)(g) At a certain temperature, a chemist finds that a reaction vessel containing a mixture of iron(III) oxide, hydrogen, iron, and water at equilibrium has the following composition: compound amount Calculate the value of the equilibrium constant for this reaction. Round your answer to significant digits. Clears your work. Undoes your last action. Provides information about entering answers.

Answer:

I never had a crush on anyone

Explanation:

Answer:

the independent variable is the beakers

Explanation:

Answer:

CO2 is a green house gas

Explanation:

CO2 is believed to act as a canopy over the earth's surface absorbing infrared (heat ray) from the earth and re-emitting it  back to the earth.

By so doing, temperature is increased and more frozen CO2 will defrost causing even greater temperature rise.

The gradual rise in the earth's temperature is known as global warming.

Proteins are large biomolecules, or macromolecules, consisting of one or more long chains of amino acid residues. Hope this helps!

Answer:

Proteins are carbohydrates that come from nutritious food.

They are one of the four main carbohydrates.

This is a simple definition of the word proteins.

Hope this helps!

Answer:

[tex]0.000056[/tex]

Explanation:

If [tex]pH[/tex] is given then hydronium ion concentration is equal to [tex]-log[H_3O^+][/tex]

The hydronium ion concentration can be found from the pH using the following formula:

Hydronium ion concentration = [tex]10^{-pH}[/tex]

As the pH of a HClO4 solution was measured as 4.251,

put [tex]pH=4.251[/tex]

So,

Concentration of HClO4 in the solution = [tex]10^{-4.251}=0.000056[/tex]

Answer:

HOPE THIS HELPED :) good luck! ❤️

Explanation:

A reactant is a substance that is present at the start of a chemical reaction. The substance to the right of the arrow are called products . A product is a substance that is present at the end of a chemical reaction.

Answer:

Reactants are the starting substances and products are the ending substances in a chemical reaction.  The atoms in reactants are arranged one way and are rearranged in a different way to form the products (in other words, reactants are chemically different from products). The properties of reactants differ from the properties of products.

Explanation:

Sample response on Edge 2021

Answer:

Yes

Explanation:

As the number of animals that eat plants increase, the number of plants decrease. This is because the animals are eating a larger and larger number of plants and reducing the population.

When the number of plants gets too low, the animals will not be able to survive, and they will start to decrease in numbers. In turn, the plants will increase again. Eventually, they will reach an equilibrium.

Answer:

Kindly check the explanation section.

Explanation:

The chemical compound known as Borates has the Molecular Formula: BO3^-3. It has the shape of a triangle but Borates can form multiples ones that is to say quadrangles. Also, as a result of the fact that the octect is not complete, Borates are used as lewis Acid.

The oxygen present in Borates is/are directly attached to the central atom that is Boron while in non silicates the oxygen(s) that may be present is not directly attached to the central atom.

Answer:

dinosaur footprint

Explanation:

dinosaur footprint because the deffinition of trace fossil is a fossil of a foot print

Answer: Dinosaur footprint should be correct!

Explanation: As in the name, trace footprints are practically just traces, so a Dino print is a perfect example! The dinosaur left a trace, leaving evidence about it, for science to study:) please let me know if this helps! :)

Answer:

[tex]2,092,000J[/tex]

Explanation:

Hello.

In this case, we need to perform a unit conversion problem between cal and joule, taking into account that 1 cal equals 4.184 joules of energy, therefore, we write the following proportional factor:

[tex]500,000cal*\frac{4.184J}{1cal}[/tex]

Whereas the 1 cal is written under the line in order to simplify the initial can and the 4.184 J on the line as joules are the required units. Thus, we obtain:

[tex]2,092,000J[/tex]

As the energy required to burn off such amount of energy given of potato chips.

Best regards.

Answer:

Explanation:

Finding Limiting reactant:

Convert all reactant data to moles, divide by respective coefficient => smaller value is the limiting reactant.

Given      2KCl      +     CaF₂ => 2KF + CaCl₂

            55.1mole      46.7mole

(55.1/2) = 27.55          (46.7/1) = 46.7

Limiting reactant is KCl b/c smaller value after dividing by respective coefficients. CaF₂ will be in excess when rxn consumes all KCl.

Moles KF = 55.1 mole as coefficients of two substances in balanced equation are equal.

Answer:

2

Explanation:

Answer:

Aluminium

Explanation:

From the question given above, the following data were obtained:

Diameter (d) = 1.25 cm

Height (h) = 6.48 cm

Volume (V) of cylindrical=.?

Mass (m) of cylindrical object = 21.535 g

Density of the cylindrical object =..?

Next, we shall determine the radius of the cylindrical object. This is illustrated below:

Diameter (d) = 1.25 cm

Radius (r) =?

r = d/2

r = 1.25/2

Radius (r) = 0.625 cm

Next, we shall determine the volume of the cylindrical object. This can be obtained as follow:

Height (h) = 6.48 cm

Radius (r) = 0.625 cm

Pi (π) = 3.14

Volume (V) of cylindrical=.?

V = πr²h

V = 3.14 × 0.625² × 6.48

V = 7.948 cm³

Recall:

1 cm³ = 1 mL

Therefore

7.948 cm³ = 7.948 mL

Thus, the volume of the cylindrical object is 7.948 mL

Finally, we shall determine the metal in which the cylindrical object is made up of by calculating the density of the cylindrical object. This can be obtained as follow:

Mass (m) of cylindrical object = 21.535 g

Volume of the cylindrical object = 7.948 mL

Density of cylindrical object =?

Density = mass /volume

Density = 21.535 / 7.948

Density of cylindrical object = 2.7 g/mL

Comparing the density of the cylindrical object (i.e 2.7 g/mL) with those given in the table in the question, the cylindrical object is made of aluminium since they have the same density.

Answer:

Protons, Neutrons and electrons

Explanation:

Answer:

the reactivity and the valence electrons

Explanation:

the reactivity of the elements would have played a significant role in why such elements were grouped together. the number of valence electrons dictates how reactive an element is - the less valence electrons the more reactive it is. the column, group 1 in which these elements are put together in, show that each of the elements have 1 valence electrons and are therefore reactive.

you can go on to further explain what valence electrons are, explain what the group numbers are associated with the valence electrons and how valence electrons effect reactivity. further this, talk about how the three elements have the same number of valence electrons and therefore were grouped together

Answer:

D. 18

Explanation:

group 18 elements are called noble gases.

They have complete octet in their valance shell. Therefore, they are least likely to form bonds with other elements.

Answer:

C₁₂H₂₂O₁₁ + H₂O     →    C₅H₁₂O₆ + C₆H₁₂O₆

Explanation:

Chemical equation:

C₁₂H₂₂O₁₁ + H₂O     →    C₅H₁₂O₆ + C₆H₁₂O₆

Source of sucrose:

Sucrose is present in roots of plants and also in fruits. It is storage form of energy. Some insects and bacteria use sucrose as main food. Best example is honeybee which collect sucrose and convert it into honey.

Monomers of sucrose and hydrolysis:

Sucrose consist of monomers glucose and fructose which are join together through glycosidic bond. Hydrolysis break the sucrose molecule into glucose and fructose. In hydrolysis glycosidic bond is break which convert the sucrose into glucose and fructose. Hydrolysis is slow process but this reaction is catalyze by enzyme. The enzyme invertase catalyze this reaction.

The given reaction also completely follow the law of conservation of mass. There are equal number of atoms of elements on both side of chemical equation thus mass remain conserved.

Answer:

helium

The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.

Answer:

143 N

Explanation:

Answer:

1.  Can help in development of effective medications

2.  Can help explain genetic diseases

3.  Composed of about 19,000 genes

Explanation:

The other answer options are misleading.

Genetic code of humans can help with understanding more than just human genetics.

Human genetics is composed of 23 chromosome pairs, for a total of 46 chromosomes.

Answer:

Thermoplastics have low melting temperature because of the week van der Waals bonds between their Long Chain Molecules

Polymer chains once synthesized they will remain stable in the environment because of the strong covalent bonds in the Long Chain Molecules

Explanation:

Thermoplastics are polymers that are easily melted and changed to another shape as many times as possible. They become molten when they are heated and solidify when cooled. Examples of thermoplastics include; polyethylene, polypropylene, polyvinyl chloride, polystyrene, polyamides, polyesters, and polyurethanes.

Polymers are organic materials that consists of a long chain of atoms held together by strong covalent bonds. Polymers constitute an important environmental concern because most polymers are non biodegradable and remain in the environment almost indefinitely.

Answer:

element

Explanation:

the gas inside a noble gas is made of only one neon atom and is less reactive and would not likely combine with any other element

Answer:

it means a hamburger has less calories bc its referring to steak that has been grounded and the highlight would be calories

Explanation:

C option i think but I didn't know

Answer:

its Radiation

Explanation:

Because it transfers heat from a object to a less hot object in this case from a hot curling iron to your hair.