question What is the purpose of internal standards in analytical chemistry

Chemistry

What is the purpose of internal standards in analytical chemistry?

A. Correcting for variations in experimental conditions
B. Providing reference materials
C. Enhancing sensitivity
D. Reducing reaction rates

Internal standards in analytical chemistry help correct for variations in experimental conditions.

The process of a gas changing directly from a gas to a solid is known as:

A. Deposition
B. Condensation
C. Sublimation
D. Evaporation

What type of reaction involves the combination of a metal with a nonmetal to form an ionic compound?

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

What is the term for a bond formed by the attraction between the positive end of one molecule and the negative end of another molecule?

A. Hydrogen bond
B. London dispersion
C. Metallic
D. Ionic

Which of the following is a characteristic of a base?

A. Bitter taste
B. Turns blue litmus paper red
C. Releases H⁺ ions
D. Low pH

The pH scale is a measure of the concentration of:

A. Hydrogen ions (H⁺)
B. Hydroxide ions (OH⁻)
C. Sodium ions (Na⁺)
D. Chloride ions (Cl⁻)

Which of the following is a strong acid?

A. HCl
B. CH₃COOH
C. H₂CO₃
D. HNO₂

What is the IUPAC name for CH₃CH₂CH₂COOH?

A. Butanoic acid
B. Ethanoic acid
C. Propanoic acid
D. Pentanoic acid

The compound MgSO₄ is commonly known as:

A. Magnesium sulfate
B. Magnesium chloride
C. Magnesium nitrate
D. Magnesium carbonate

The unit of molarity (M) is:

A. mol/L
B. g/L
C. L/mol
D. mol/g

The bond angle in a molecule with a bent shape is typically less than:

A. 109.5°
B. 120°
C. 180°
D. 90°