Answer:
0.453 moles
Explanation:
The balanced equation for the reaction is:
2Fe(s) + 3O2(g) ==> 2Fe2O3
From the equation, mass of O2 involved = 16 x 2 x 3 = 96g
mass of Fe2O3 involved = [(2x26) + 3 x 16] x 2
= 100g
Therefore 96g of O2 produced 100g of Fe2O3
32.2g of O2 Will produce 100x32.2/96
= 33.54g of Fe2O3
Converting it to mole using number of mole = mass/molar mass
but molar mass of Fe2O3 = 26 + (16 X 3)
= 74g/mole
Therefore number of mole of 33.54g of Fe2O3 = 33.54/74
= 0.453 moles
An alternative method by which we can overcome this global issue is by harnessing Solar energy.
Discussion:
Fossil fuels cause environmental pollution. This is because they are organic compounds and on combustion, they release air pollutants such as, Carbon monoxide.
As a panacea, the use of solar panels for harnessing Solar energy in a bid to replace energy from fossil fuels will prove to be am effective method by which we can overcome the global issue of pollution caused by burning of fossil fuels.
Solar energy is a clean source of energy as there's no release of harmful air pollutants.
Read more on fossil fuels:
brainly.com/question/14432674
Answer:
1.39 × 10⁴ g
Explanation:
Step 1: Given data
Density of gold (ρ): 19.3 g/cm³
Volume of the gold bar (V): 720 cm³
Step 2: Calculate the mass (m) of the gold bar
The density of a substance is equal to its mass divided by its volume. This is expressed through the following expression.
ρ = m/V
m = ρ × V
m = 19.3 g/cm³ × 720 cm³
m = 1.39 × 10⁴ g
The mass of the gold bar is 1.39 × 10⁴ g.
Answer:
A.
Powders have more surface area and will dissolve faster.
Explanation:
please mark this answer as brainlest
<span>This is a physical property. Physical properties involve changes of phase, or state of matter, of which melting is an example. Melting involves a change from a solid state to a liquid state. The internal energy of the solid increases, usually by applying heat, which increases the temperature to the melting point of the substance.</span>