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Answer:

Theoretical yield = 16.76 g

Percent yield = 87%

Explanation:

Given data:

Mass of iron oxide = 23.5 g

Theoretical yield of iron = ?

Actual yield of iron = 14.5 g

Percent yield of iron = ?

Solution:

Chemical equation:

2Fe₂O₃ + 3C     →  4Fe + 3CO₂

Number of moles of iron oxide:

Number of moles = mass/molar mass

Number of moles = 23.5 g/ 159.69 g/mol

Number of moles = 0.15 mol

Now we will compare the mole of iron oxide with iron metal.

                      Fe₂O₃         :            Fe

                         2              :              4

                      0.15            :          4/2×0.15 = 0.3

Mass of iron:

Mass = number of moles × molar mass

Mass = 0.3 mol × 55.85 g/mol

Mass = 16.76 g

Percent yield:

percent yield = (actual yield / theoretical yield)× 100

Percent yield = (14.5 g / 16.76 g) × 100

Percent yield = 0.87 × 100

Percent yield = 87%

Answer:

I tried the answer above and it’s correct

Explanation:

Answer:

The nail will exert a force of equal strength in the opposite direction on the first object.

Explanation:

"According to Newton's third law of motion, when a hammer strikes and exerts force on a nail, the nail exerts a force of equal strength in the opposite direction on the first object."

Basically, if you push someone, they will fall over right?

Still, you will feel the force as you push them over, and you might stumble back while they are pinwheeling and falling into a pool.

That force is that torque when the person's weight is also pushing back at you while your force is pushing at them.

Answer:

Once you have identified the limiting reactant, you calculate how much of the other reactant it must have reacted with and subtract from the original amount.

Explanation:

 1.  Write the chemical equation.

   2.Calculate the moles of product from the first reactant.

   3.Calculate the moles of product from the second reactant.

   4.Identify the limiting reactant and the excess reactant.

   5.Calculate the mass of excess reactant used up.

   6.Calculate the mass of unused excess reactant.

   7.Calculate the mass of limiting reactant needed to react with the unused excess reactant.

Answer:Delta

Explanation:

Answer:

silver

Explanation:

The most electrically conductive element is silver, followed by copper and gold. Silver also has the highest thermal conductivity of any element and the highest light reflectance.

Answer:

A. copper

Explanation:

edge 2021

Answer:

e

Explanation:

it's in the index fossil range

Answer:

Explanation:

In marine strata, index fossils that are commonly used include the single-celled Protista with hard body parts and larger forms such as ammonoids. In terrestrial sediments of the Cenozoic Era, which began about 65.5 million years ago, mammals are widely used to date deposits.

The volume of the gas at STP = 35.01 L

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure).

In general, the gas equation can be written  

[tex]\large {\boxed {\bold {PV = nRT}}}[/tex]

where  

P = pressure, atm  

V = volume, liter  

n = number of moles  

R = gas constant = 0.08206 L.atm / mol K  

T = temperature, Kelvin  

V=17.4 L

T = 23 + 273 = 296 K

P = 2.18 atm

[tex]\tt mol=n=\dfrac{PV}{RT}\\\\n=\dfrac{2.18\times 17.4}{0.082\times 296}\\\\n=1.563[/tex]

The volume of the gas occupy at STP :

[tex]\tt 1.563\times 22.4=35.01~L[/tex]

Answer:

Its D. Light energy to to electrical energy

Explanation:

Answer:

D. Light energy to electrical energy

Explanation:

its lowkey obvious lol

Answer:

molecule

Explanation:

A molecule is formed from two or more atoms

Explanation:

Matter can be classified into two broad categories: pure substances and mixtures. ... A material composed of two or more substances is a mixture. Elements and compounds are both examples of pure substances. A substance that cannot be broken down into chemically simpler components is an elementOne useful way of organizing our understanding of matter is to think of a hierarchy that extends down from the most general and complex to the simplest and most fundamental (Figure 3.4.1 ). Matter can be classified into two broad categories: pure substances and mixtures. A pure substance is a form of matter that has a constant composition (meaning that it is the same everywhere) and properties that are constant throughout the sample (meaning that there is only one set of properties such as melting point, color, boiling point, etc. throughout the matter). A material composed of two or more substances is a mixture. Elements and compounds are both examples of pure substances. A substance that cannot be broken down into chemically simpler components is an element. Aluminum, which is used in soda cans, is an element. A substance that can be broken down into chemically simpler components (because it has more than one element) is a compound. For example, water is a compound composed of the elements hydrogen and oxygen. Today, there are about 118 elements in the known universe. In contrast, scientists have identified tens of millions of different compounds to date.

An element is a substance which can be split into simpler unit by ordinary chemical prcess.

Compound this is a pure substance that is composed of two or more element in a fixed and definite portion.

Mixture contains two or more constituents which can be easily separated by physical method.

Answer:

Tundra are cold bioms. They include poler bears wolfs rabbits etc

Explanation:

The intial temperature : 59.865 °C

Heat added :

Q = m . c . ΔT

Q = heat, J  

m = mass, g  

c = specific heat, joules / g ° C  

∆T = temperature difference, ° C / K  

[tex]\tt 305=94.8\times 0.128\times (85-t_1)\\\\85-t_1=25.135\\\\t_1=59.865^oC[/tex]

Explanation:

A delta is a process that forms by river deposition into an ocean or marine environment.

The element having 8 valence electrons and 4 energy levels is krypton, (Kr)  it is a noble gas included in 18th group.

Krypton is 36th element in periodic table with main shell electronic configuration, K= 2, L= 8, M= 18 and N= 8 where, K, L, M and N are energy levels.

Krypton is in the group noble gases also called inert gases. The group members of Kr are, Helium, argon and xenon. Thus krypton is the element with 4 energy levels and 8 valence electrons.

To know more about Kr, refer the link below:

https://brainly.com/question/14535867

#SPJ5

Explanation:

Not sure if ment like an electric type that gives off energy but here is my answer. a good conductor comes off handy in every situation. meaning, without one a machine, or whatever the conductor is being used for could be unstable, or not be able to work perfectly. which would could lead to certain malfunctions. so a good conductor could also give you a better chance of succeeding.

Answer:

There are 11 protons in an atom T.

Explanation:

In chemistry, the scientific word for proton is also known as atomic number so the proton number will be 11.

Answer:

11

Explanation:

Explanation:

When we have direct sunlight, the temperature is higher compared to indirect sunlight.

Direct sunlight is usually overhead whereas indirect sunlight is at an angle to the surface.

Explanation:

The word BOOK; is made up of 4 letters and each actually represents the symbol of an element.

An element is a distinct substance that cannot be split-up into simpler substances.

  B    -   Boron

  O    - Oxygen

  O   - Oxygen

  K   - Potassium

We can see that the word BOOK shows us elements boron, oxygen, oxygen and potassium.

Answer:

B. Grilling a piece of meat

since the process involves burning

Answer: C

Explanation:

There are 761.4 grams of CS2 in 10.00 mol.

To calculate the amount of grams present in a given amount of moles, the molar mass of the substance must be used, as follows:

                                        [tex]m = MM \times mol[/tex]

In this way, just perform the following operation:

                                          [tex]m = 76.14 \times 10[/tex]

                                         [tex]m = 761.4 grams[/tex]

Thus, there are 761.4 grams of CS2 in 10 mol of the substance.

Learn more about mole calculation in: brainly.com/question/15693285

Answer:

Gas, liquid, and plasma

Explanation:

Answer:

Liquid, Gas and Plasma

Explanation:

➨Think about it like this if you put a material made out of these and flipped it over which one would have the most effect of change in shape?

▶Liquid molecules slide past each other meaning they are not held in place.

▶Gas molecules are "excited" they bounce around everywhere meaning they are not held in place.

▶Plasma has no fixed shape or volume so it cant be held in place!

▶Solid molecules have a fixed shape so they cannot move on their own.

Hope I helped! Brainliest appreciated!

Answer:

A

Explanation:

When Na atom chemically combine with with Cl atom to form NaCl both atoms loose their chemical properties due to the fact that Na atom transfer an electron to cl atom. after transfer of electron Na atom become Na ion (cation) and Cl atom become Cl ion (anion)

Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

[tex]a = \frac{f}{m} \\ [/tex]

f is the force

m is the mass

From the question we have

[tex]a = \frac{47}{7} \\ = 6.714285...[/tex]

We have the final answer as

Hope this helps you

Answer: That is Conduction

Explanation:

:)

Conduction

reason: Conduction is the transfer of heat through contact between items.

(Brainliest, please?)

Answer:

copper

Explanation:

Answer:

COPPER!!!!!

Explanation:

I got it right on the test, on Edge. Hope this helps. :))))

Answer:

2Mg (s) + CO₂ (g) → 2MgO (s) + C (s)

General Formulas and Concepts:

Chemistry - Reactions

Explanation:

Step 1: Define RxN

Mg (s) + CO₂ (g) → MgO (s) + C (s)

Step 2: Balance RxN

2Mg (s) + CO₂ (g) → 2MgO (s) + C (s)