Question

PLEASE HELP ill be asking more questions for whoever wants to help THANK YOU:)

A.In a chemical reactions, substances after the arrow are called ________.
C2H4 + O2 → CO2 + H2O
1 products
2 reactants
3 no answer text provided
4 chemicals
B.In this reaction: sodium + water -> sodium hydroxide + hydrogen gas
which substances are the reactants?
1 hydrogen gas
2 sodium hydroxide + hydrogen gas
3 sodium + water
4 sodium hydroxide
C. This is an example of what type of reaction?
Mg + Fe2O3 → Fe + 3 MgO
1 decomposition
2 double replacement
3 single replacement
4 synthesis
5 combustion
D. This is an example of what type of reaction?
Ca(OH)2 + Al2(SO4)3 → CaSO4 + Al(OH)3
1 synthesis
2 decomposition
3 double replacement
4 combustion
5 single replacement
E. This is an example of what type of reaction? PbSO4->PbSO3 + O2
1 single replacement
2 combustion
3 double replacement
4 synthesis
5 decomposition
F. This is an example of what type of reaction?
C2H4 + O2 → CO2 + H2O
1 single replacement
2 double replacement
3 synthesis
4 decomposition
5 combustion

Answer 1

Each reaction has its own characteristics which can be determined from the reactants and products

Further explanation

Every chemical reaction involves a compound consisting of reactants and products

Reactants are compounds that react and form new compounds called products

There are several forms of reactions that can occur, including single replacement, double replacement, synthesis, decomposition, etc.

A. substances after the arrow are called 1 products

The product compounds in this reaction are: CO₂ + H₂O

B. which substances are the reactants : sodium + water

and The product compounds : sodium hydroxide + hydrogen gas

Reaction

2Na(s) + 2H₂O → 2NaOH(aq) + H₂(g)

C. Mg + Fe₂O₃ → Fe + 3 MgO is an example of single replacement :one element replaces the other elements of a compound to produce new elements and compounds

D. Ca(OH)₂ + Al₂(SO₄)₃ → CaSO₄ + Al(OH)₃ is an example of double replacement : there is an ion exchange between two ion compounds in the reactant to form two new ion compounds in the product

E. PbSO₄->PbSO₃ + O₂ is an example of decomposition : One compound breaks down into 2 components

F.C₂H₄ + O₂ → CO₂ + H₂O is an example of combustion : when Oxygen combines with hydrocarbon