This chemical reaction is depicted.
SnO2 + H2 → Sn + H2O
What can be affirmed regarding this chemical reaction?
(1 point)
Responses
It is unbalanced due to the fact that the mass of the reactants exceeds the mass of the products.
It is unbalanced due to the fact that the mass of the reactants exceeds the mass of the products.
It is balanced as the total mass of the reactants equals the total mass of the products.
It is balanced as the total mass of the reactants equals the total mass of the products.
It is balanced because the quantity of reactants matches the quantity of products.
It is balanced because the quantity of reactants matches the quantity of products.
It is unbalanced as the mass of the reactants is less than the mass of the products.
Review the details regarding an experiment.
Jason intends to conduct an experiment demonstrating the conservation of mass by burning steel wool, which primarily consists of iron. During the combustion process, the iron in the steel wool reacts with oxygen to produce iron(III) oxide.
Which phase of his experiment holds the utmost significance for accurately showcasing the conservation of mass?
(1 point)
Responses
The steel wool should undergo combustion for an extended duration, preferably lasting a minimum of two hours.
The steel wool should undergo combustion for an extended duration, preferably lasting a minimum of two hours.
The steel wool should be completely combusted to ensure that no iron remains in its initial form.
The steel wool should be completely combusted to ensure that no iron remains in its initial form.
The steel wool must undergo combustion within an airtight container or another enclosed system.
The steel wool must undergo combustion within an airtight container or another enclosed system.
The steel wool should be ignited in an environment with ambient temperature, typically ranging from 20 to 25°C.
The steel wool should be ignited in an environment with ambient temperature, typically ranging from 20 to 25°C.
What kind of reaction is depicted in the following equation?
2H2o → 2H2 + O2
(1 point)
Responses
synthesis
synthesis
double replacement
double replacement
decomposition
decomposition
single replacement
Which chemical reaction upholds the principle of the conservation of matter?(1 point)
Responses
K + 2MgBr → KBr + 2Mg
K + 2MgBr → KBr + 2Mg
2K + 2MgBr → KBr + 2Mg
2K + 2MgBr → KBr + 2Mg
K + MgBr → KBr + Mg
K + MgBr → KBr + Mg
2K + MgBr → 2KBr + Mg
A double replacement chemical equation is shown.
__MnO2 + __HCl → __MnCl2 + __H2O + __Cl2
What values should be inserted into the blanks as coefficients to ensure the preservation of the law of conservation of matter?
(1 point)
Responses
1,2,1,2,1
1,2,1,2,1
2,3,1,2,1
2,3,1,2,1
1,4,1,2,1
1,4,1,2,1
2,4,2,4,1