Answer:
how can I solve this ?4Al+3O2 produce 2Al2O3 find a) oxygen atoms needed to react with 5.4 g of aluminium b) grams of oxygen needed to react with 0.6 mol of aluminium?
(A) n=m/M,
n(Al)=5.4/27=0.2 moles
n(O2)=n(Al)*3/4=0.2*3/4=0.15 moles
Number of oxygen atoms= n(O2)*Avogadro's number
=0.15*6.02*10^23=9.03*10^22 oxgyen atoms
(B)
n=m/M
n(Al)=0.6/27=0.02222 moles
n(O2)=n(Al)*3/4=0.016666 moles
m=n*M
m(O2)=0.0166666*32=0.53333 grams
Answer:
True
Explanation:
Protons and neutrons are found in the atom's nucleus and electrons are in regions outside the nucleus. Protons have a positive charge, electrons have a negative charge, and neutrons have no charge.
Answer:
because of the mechanisms allowing water to pass through when it closes the water stops flowing through
Explanation:
The energy of an object due to its motion or position; the sum of an object's kinetic energy and potential energy
A photodecomposition reaction is a kind of decomposition reaction wherein the reactant is broken down by absorbing energy from photons into its constituents. The decomposition into dioxygen and an oxygen radical, as illustrated by the chemical equation given below, is an example of a photo decomposition reaction.
O3+ hν → O2+ O.O3+ hν → O2+ O.
Excitation energy hops from light-capturing pigment molecules to reaction centre molecules step-by-step along the molecular energy ladder, according to the traditional, semi-classical model of photosynthetic energy transfer.
The absorption spectra of the photosynthetic pigments in the organism determine the efficiency of photons of various wavelengths. Chlorophylls absorb light in the violet-blue and red spectrums, whereas accessory pigments absorb light in other wavelengths. Red algae can photosynthesize in deep seas because their phycobilins absorb blue-green light, which penetrates further into water than red light. In the pigment molecule, each absorbed photon triggers the creation of an exciton (an electron stimulated to a higher energy state).
