Which part of the electromagnetic spectrum is nearest to radio waves? X-rays microwaves gamma rays ultraviolet light

iron is made by a reduction of iron oxide with carbon monoxide. Fe2O3+3CO-2Fe+3CO2. Calculate the mass of iron that can be forme

lyudmila [28]

Answer:

Mass = 88.12 g

Explanation:

Given data:

Mass of iron oxide = 126 g

Mass of iron formed = ?

Solution:

Chemical equation:

Fe₂O₃ + 3CO → 2Fe + 3CO₂

Number of moles of iron oxide:

Number of moles = mass/molar mass

Number of moles = 126 g/ 159.69 g/mol

Number of moles = 0.789 mol

Now we will compare the moles of iron with iron oxide.

Fe₂O₃ : Fe

1 : 2

0.789 : 2/1×0.789 = 1.578 mol

Mass of iron:

Mass = number of moles ×molar mass

Mass = 1.578 mol × 55.84 g/mol

Mass = 88.12 g

4 0

3 years ago

Identify the name of the ionic compound with the formula MgS. Group of answer choices magnesium sulfide magnesium sulfite magnes

klasskru [66]

<h2>Answer: magnesium sulfide</h2>

<h3>Explanation:</h3>

MgS → Mg²⁺ + S²⁻

S²⁻ is known as the sulfide ion. That makes MgS Magnesium Sulfide.

For consideration:

magnesium sulfide MgS

magnesium sulfite MgSO₃

magnesium sulfate MgSO₄

magnesium sulfur Mg & S

6 0

3 years ago

A sample of Freon-12 (CF2Cl2) occupies 2.842 x 101 L at 331 K and 2.525 x 102 kPa. Find its volume (in L) at standard temperatur

Angelina_Jolie [31]

We have to first find the number of moles of Freon-12 in the sample using the ideal gas law equation
PV = nRT
n = $\frac{PV}{RT}$
since the number of moles at both conditions given and at stp we can write the following formula
$\frac{P1V1}{RT1} = \frac{P2V2}{RT2}$
where parameters for the given conditions are on the left side and parameters for STP conditions are on the right side of the equation
where P1 - pressure - 252.5 kPa
V1 - volume - 28.42 x 10⁻³ m³
R - universal gas constant
T1 - 331 K

STP conditions
P2 - 101 325 Pa
T2 - 273 K

substituting these values in the equation

$\frac{252 500Pa*28.42*10 ^{-3}m^{3} }{R*331K} = \frac{101325 Pa*V}{R*273 K}$

V = 58.41 L
Volume at STP is 58.41 L

3 0

3 years ago

Using c=λν and E=hν (Where h or Planck’s constant is 6.626 *10 ⁻³⁴Js). Please find the energy that a wavelength has if it has a

sladkih [1.3K]

<span> The energy of wave if it has a wavelength of 3.0 </span>× <span>10⁷ nm is 6.26 </span>× 10⁻²⁴ J.

Attached below, is how to derive that answer. Note that, E= Energy, λ = wavelength, h = Plank's Constant and C= speed of light

Also, I converted the wavelength from nm to cm.

5 0

3 years ago

What is carbon fixation? carbon atoms are joined with oxygen molecules to make carbon dioxide carbon atoms are added to molecule

Sidana [21]

Carbon fixation is the process of conversion in which carbon-dioxide (inorganic carbon) converts into organic compounds with the help of living organisms and example of this process is photosynthesis.

From the definition, it is confirmed that there is no formation of carbon dioxide takes place i.e. carbon doesn't joined with oxygen molecules.

Thus, carbon fixation is the process in which carbon atoms are added to the molecules of hydrogen and oxygen to make carbohydrates.

3 0

3 years ago