Answer:
Option A says we have 4 moles of Fe for each 3 moles O2
This is correct For 3 moles of O2 consumed, we need 4 moles of Fe to be reacted
Explanation:
Step 1: Data given
Step 2: The balanced equation
4Fe + 3O2 → 2Fe2O3
Step 3: Calculate the mol ratio
For 3 moles O2 we'll have 4 moles Fe
Option A says we have 4 moles of Fe for each 3 moles O2
This is correct For 3 moles of O2 consumed, we need 4 moles of Fe to be reacted
Option b says we have 2 mole Fe2O3 for each 4 moles Fe
This doesnt say anything about O2. So doesn't apply for this question.
Option C says we have 4 moles of Fe for each 2 moles Fe2O3
This is the same as option B, so doesn't apply for this question.
Option D says for each 3 moles of O2 we have 2 Fe2O3
This is true, but doesn't say anything about Fe so doesn't apply here.
Answer:
Explanation:
Of course you could do the separation chemically. Dissolve the salt up in water, pass thru a filter, wash the iron filings with ethanol, which would encourage the salt to precipitate from solution.
I do hope I helped you! :)
Answer:
190 L
Explanation:
Given that:
Number of moles = mass/molar mass
number of moles = 5.64
molar mass of aluminum chloride = 133.34 g/mol
∴
The balanced equation is:
2 Al + 3 Cl2 --> 2AlCl3.
From above reaction:
5.64 mole of AlCl3 reacts with 3 mole Cl2 to give 2 mole AlCl3
i.e
= 8.46 mole Cl2 gas.
At Standard temperature and pressure:
= (22.4 L/1 mole gas) * (8.46 mole Cl2)
= 190 L chlorine gas
Answer:
d. Epoxy
Explanation:
Adhesion or adhesive properties of a substance is the property that allows bonding of dissimilar materials if necessary. Adhesives may have high cohesive strength or a low cohesive strength.
PVC "glue" is usually a solvent for plastic components and these are different type of PVC glues. They function well on plastics.
HDPE - is known as High-density polyethylene or polyethylene high-density is a thermoplastic polymer in short it is what we know as plastic bags or nylon produced from the monomer ethylene. HDPE is not an adhesive
UHMWPE - is known as Ultra-high-molecular-weight polyethylene (UHMWPE, UHMW) is a subset of the thermoplastic polyethylene. Also known as high-modulus polyethylene, (HMPE). UHMWPE is not an adhesive.
An epoxy adhesive is a copolymer adhesive formed by mixing together a resin and a hardener. There are some special epoxies however don't require a hardener, but are activated by heat instead. Others epoxies hardening strength may degrade in under exposure to ultraviolet light or high heat. Adhesives such as epoxies have many different uses. Epoxy may be used on metal, glass, plastic, rubber, fiberglass and fiberglass-reinforced plastic (FRP).
Bakelite or polyoxybenzylmethylenglycolanhydride isn't an adhesive and it was the first plastic made from synthetic components.
Epoxy however has very strong adhesive properties because of the varieties of substances it can bring to together.
