Answer:
The chemical equation that is properly balanced is;
e. Sn + 4HNO₃ → SnO₂ + 4NO₂ + 2H₂O
Explanation:
To solve the question, we note the reactions thus and we look for a reason why the reaction is not balanced as follows.
a. CH₃CHO + 3O₂ → 2CO₂ + 2H₂O
Here we have 7 oxygen atoms in the reactant and 6 in the products
Not balanced
b. NH₄NO₃ → 2H₂O + N₂
Here we have three oxygen in the reactant and four in the products = Not balanced
c. Na₂CO₃ + 2H₂SO₄ → Na₂SO₄ + 2H₂O + CO₂
Here we have 11 oxygen atoms in the reactant and 8 in the products = Not balanced
d. 2Na₂SO₄ + 3Bi(NO₃)₃ → Bi₂(SO 4)₃ + 9NaNO₃
Here we have 2 Na in the reactants and 9 Na in the products = Not balanced
e. Sn + 4HNO₃ → SnO₂ + 4NO₂ + 2H₂O
Here we have equal number of products and reactants = Balanced chemcal reaction equation.
Answer:
C)We cannot be sure unless we find out its boiling point.
Explanation:
It is necessary to clearly explain here that simply observing two compounds of the same homologous series irrespective of how close they may be in the series will not give us the faintest idea regarding which one will be a liquid, solid or gas at room temperature.
However, to determine whether an unknown substance will be a liquid at room temperature, then its important to measure its boiling point. If the boiling point is above room temperature, and the melting point is below room temperature, the compound is a liquid. If the boiling point of the unknown substance is below room temperature, it is a gas.
It is now safe to conclude that cannot decide on the state of matter in which a compound exists unless we know something about its boiling point, not merely looking closely at the properties of its neighbouring compounds in the same homologous series
Answer:
The element of the atom.
Explanation:
The number of protons confirms what element is the atom.
Answer:
C) The molecules become separated from each other.
Explanation:
