question The balanced chemical equation for the reaction between hydrochloric acid HCl and sodium carbonate Na CO is

Chemistry

The balanced chemical equation for the reaction between hydrochloric acid (HCl) and sodium carbonate (Na₂CO₃) is:

A. 2HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂
B. HCl + Na₂CO₃ → NaCl + H₂O + CO₂
C. 2HCl + Na₂CO₃ → NaCl + H₂O + CO₂
D. HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂

The balanced equation is 2HCl + Na₂CO₃ → 2NaCl + H₂O + CO₂.

Which type of reaction involves the exchange of ions between two compounds to form new compounds?

A. Double displacement
B. Single displacement
C. Synthesis
D. Combustion

The reaction between an acid and an alcohol to form an ester is known as:

A. Esterification
B. Hydrolysis
C. Saponification
D. Dehydration

The chemical equation 2HgCl₂ + C₂H₅OH → 2Hg + 2HCl + CH₃CHO represents a:

A. Displacement
B. Synthesis
C. Decomposition
D. Redox

Which technique involves the separation of charged particles in an electric field based on their mass-to-charge ratio?

A. Electrophoresis
B. Mass spectrometry
C. Chromatography
D. Spectrophotometry

The compound CH₄ is commonly known as:

A. Methane
B. Ethane
C. Propane
D. Butane

In the chemical equation 2HgO → 2Hg + O₂, the type of reaction is:

A. Decomposition
B. Synthesis
C. Combustion
D. Displacement

The reaction A + B → AB is an example of a:

A. Synthesis
B. Decomposition
C. Single displacement
D. Double displacement

What is the general formula for alkanes?

A. CnH₂n
B. CnH2n+2
C. CnH2n-2
D. CnHn

The concept of "adiabatic wall" in thermodynamics refers to a boundary that allows:

A. Heat transfer
B. Volume change
C. Pressure change
D. No heat transfer

The Kirchhoff's Law relates the change in enthalpy (ΔH) with temperature and:

A. Pressure
B. Volume
C. Entropy
D. Heat capacity