What is the mass of 2.25 mol of the element Iron (Fe)?
Choose the correct set up from the given choices.

a. You would divided 2.25 mol by (55.84 mol divided by 1 gram)

b. You would multiply 2.25 mol by (1mol divided by 55.84 g)

c. You would multiply 2.25 mol by (55.84g divided by 1 mol)

d. You would divide 2.25 mol by (1 mol divided by 55.84g)

Answer:

Mass = 17.8 g

Explanation:

Given data:

Number of atoms of Ca = 2.68 × 10²³

Mass in gram = ?

Solution:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

2.68 × 10²³ atoms × 1 mole  /6.022 × 10²³ atoms

0.445 mol

Mass in gram;

Mass = number of moles ×  molar mass

Mass = 0.445 mol  ×  40 g/mol

Mass = 17.8 g

Answer:

5m/s

Explanation:

2s ÷ 2 = s

10m ÷ 2 = 5m

5 meters per second or 5m/s

Answer:

I think it's B

Explanation:

I took the exam

Answer:

B. kinetic energy

Explanation:

The sum of kinetic energy and potential energy of an object is its total mechanical energy.

State​ physical property can be used to distinguish between a 1 cm cube of copper and a 1 cm cube of sugar. Hence, option D is correct.

A property (such as colour, hardness, boiling point) of the matter is not involved in its manifestation of a chemical change.

Physical properties are those general properties you notice most readily about a substance, such as its size, state of matter (solid, liquid, or gas), colour, mass, density and strength.

Values for physical properties can be determined by tests that don't alter the substance being tested.

Hence, state​ physical property can be used to distinguish between a 1 cm cube of copper and a 1 cm cube of sugar.

Learn more about the physical property here:

https://brainly.com/question/18327661

#SPJ2

Answer:

true

Explanation:

Answer:

False

Explanation:

Since when did Solar flares can affect how machines on Earth work that is negitive they have never affected how our machines work

Answer:

MgO.

Explanation:

charges of both satisfy one another (balanced) -- producing a compound MgO.

Mass MgSO₄ = 262.8 g

Given

2.190 mol MgSO₄

Required

mass

Solution

The molecular formula should be MgSO₄

So MW MgSO₄ :

= Ar Mg + Ar S + 4. Ar O

= 24 + 32 + 4. 16

= 120 g/mol

Mass MgSO₄ :

[tex]\tt mass=mol\times MW\\\\mass=2.19\times 120\\\\mass=262.8~g[/tex]

Answer:

dilute solution . . . . . . .

Explanation:

. .

Answer:

dilute soloution

Explanation:

dilute soloution as it dissolves

true 100% i just had a quiz on this.

Answer: 3.613x10^24

Explanation: Avogadro’s number represents the number of atoms in one mole of substance: 6.022x10^23 atoms/mole. Multiplying the number of moles by this number reveals that, in this sample, 3.613x10^24 atoms of methane are present.

Answer: A

Explanation: When using dimensional analysis, always put similar unit-ed numbers diagnolly from each other so they 'cross out'

For example, If you had 1 mol of gold and you wanted to convert it to grams using gold's molar mass, 196.97 g/mol, it would look like this:

Start with the given number over nothing:

[tex]\frac{1 mol Au}{} *\frac{ }{ }[/tex]

Then add your conversion, in this case the molar mass, with the MOLES on the BOTTOM, so they are diagnol with the 1 mol of Au

[tex]\frac{1 mol Au}{ } *\frac{196.7 g Au}{1 mol}[/tex]

Always have the top right in your dimensional analysis be in the units that you are solving for. In this case, we went from moles to grams, so grams is in the top right.

Hope this helps!

Also, 6.02 x 10²³ is otherwise known as avogadros number- it is used when you are converting something from moles to molecules (or particles). For example, if instead we were going from moles of gold to molecules of gold, our dimensional analysis would look like this:

[tex]\frac{1 mol Au}{ } *\frac{6.02 x 10^2^3 molecules Au}{1 mol}[/tex]

Answer:

Molecular formula = C₈H₁₆

Explanation:

Given data:

Percentage of hydrogen = 14.4%

Percentage of carbon = 85.6%

Molecular formula = ?

Molecular weight = 112 g/mol

Solution:

Number of gram atoms of H = 14.4/ 1.01 = 14.26

Number of gram atoms of C = 85.6/ 12 = 7.13

Atomic ratio:

            C                      :              H        

           7.13/7.13            :           14.26/7.13    

            1                      :                 2          

C : H = 1 : 2

Empirical formula is CH₂

Molecular formula:

Molecular formula = n (empirical formula)

n = molar mass of compound / empirical formula mass

n = 112 / 14

n = 8

Molecular formula = n (empirical formula)

Molecular formula = 8 (CH₂)

Molecular formula = C₈H₁₆

Answer:

long wire, wide wire, more resistors

long wire, narrow wire, more resistors

Explanation:

longer wires have greater resistance. The longer the wire the greater the resistance.

The answer is Long wire, Narrow wire, more resistors

Evidence:

Answer:The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotope).

Explanation:try to find what i ment and  think you will get the answer

Answer:

I think the answer is b or d

Explanation:

I THINK IS THE KEY WORD HERE

Answer:

The mass of aluminum hydroxide that will precipitate when 35.5 mL of 0.145 mol/L aqueous aluminum nitrate is mixed with 44.2 mL of 0.215 mol/L aqueous sodium hydroxide is approximately 0.247 grams

Explanation:

The given parameters are;

The volume of 0.145 mol/L aqueous aluminum nitrate in the reaction = 35.5 mL

The volume of 0.215 mol/L aqueous sodium hydroxide in the reaction = 44.2 mL

The balanced chemical equation for the reaction is given as follows;

Al(NO₃)₃ (aq) + 3NaOH (aq) → Al(OH)₃ (s) + 3NaNO₃ (aq)

Therefore;

1 mole of Al(NO₃)₃, reacts with 3 moles of NaOH to form 1 mole Al(OH)₃, and 3 moles of NaNO₃

The number of moles of aqueous aluminum nitrate in the reaction = 35.5/1000 L × 0.145 mol/L = 0.0051475 moles

The number of moles of aqueous sodium hydroxide in the reaction = 44.2/1000 L × 0.215 mol/L = 0.009503 moles

Therefore, 0.009503 moles NaOH will react with 0.009503/3 moles Al(NO₃)₃ to form 0.009503/3 moles of aluminum hydroxide precipitate

The molar mass of aluminum hydroxide = 78 g/mol

Therefore, 0.009503/3 moles of aluminum hydroxide weighs 78 × 0.009503/3 = 0.247078 grams

The mass of aluminum hydroxide that will precipitate out ≈ 0.247 grams.

Explanation:

Structural formula of propene

molecular formula = C₃H₆

molecular mass = 12×3+1×6 = 36+6 = 42

no. of double bond = 1

Explanation:

They are both in shell 5 and subshell s.

Since s only has 1 orbital, they also have the same orbital number.

But they have different magnetic spins.

Hence 3 out of 4 quantum numbers are in common.

Answer: with what

Explanation:???

Answer:

165 years.

Neptune  completes one orbit around the Sun  for every 164.79 orbits of Earth.

Explanation:

Answer:

yuh 100% true dude

Explanation:

...............

Answer:

12.0778

Explanation:

Answer:

0.514 L (liters)

Explanation:

Explanation:

Answer:

ΔG =   18KJ/mol

Explanation:

Given data:

ΔS = 0.09 Kj/mol.K

ΔH = 27 KJ/mol

Temperature  = 100 K

ΔG = ?

Solution:

Formula:

ΔG = ΔH - TΔS

ΔH = enthalpy

ΔS = entropy

by putting values,

ΔG =  27 KJ/mol - 100K(0.09 Kj/mol.K)

ΔG =  27 KJ/mol - 9 KJ/mol

ΔG =   18KJ/mol

Maybe Sugar I did that question before I think.

Answer: D

Explanation:

D is the correct answer since all of the others are basically food, depending on who eats them. Just read the little description before you try to answer the question so you won’t get confused next time.

Answer:

Tetrahedron

Explanation:

Each carbon atom in a diamond is covalently bonded to four other carbons in a tetrahedron. These tetrahedrons together form a three-dimensional network of six-membered carbon rings in the chair conformation, allowing for zero bond-angle strain.

Answer:

B

Explanation:

Answer:

Cell, Tissue, Organ, Organ system, Organism