Exam - Quiz, Flashcards & Trivia

1. Which tool would be most appropriate for collecting data during a neutralization reaction?

A pH probe

A thermometer

A graphing program

A statistics program

During a neutralization reaction, the pH level of the solution is a critical data point to monitor the progress of the reaction. A pH probe is specifically designed to measure the acidity or alkalinity of a solution, making it the most appropriate tool for collecting data during a neutralization reaction.

Explanation

During a neutralization reaction, the pH level of the solution is a critical data point to monitor the progress of the reaction. A pH probe is specifically designed to measure the acidity or alkalinity of a solution, making it the most appropriate tool for collecting data during a neutralization reaction.

2. What type of electronic probe could be used to determine the pressure inside a weather balloon with a 2-meter diameter at ambient temperature holding 525 grams of helium?

Thermometric

Barometric

Calorimetric

Spectrophotometric

Barometric probes are commonly used to measure atmospheric pressure, making them suitable for determining the pressure inside a weather balloon.

Explanation

Barometric probes are commonly used to measure atmospheric pressure, making them suitable for determining the pressure inside a weather balloon.

3. What should a scientist check for to identify the source of changes in gas pressure of one mole of a gas in a sealed chamber with a fixed volume?

Isotopes of the gas

Molecular formula of the gas

Temperature of the chamber.

Air pressure outside the chamber

The correct answer to this question is to check the temperature of the chamber. Changes in gas pressure in a sealed chamber with a fixed volume are often related to temperature fluctuations, as described by the ideal gas law.

Explanation

The correct answer to this question is to check the temperature of the chamber. Changes in gas pressure in a sealed chamber with a fixed volume are often related to temperature fluctuations, as described by the ideal gas law.

4. In order to advance to the level of a theory, a hypothesis should be?

In alignment with past theories.

Obviously accepted by most people.

A fully functional experiment.

A hypothesis needs to be repeatedly confirmed by experimentation in order to advance to the level of a theory. This is essential in order to establish the validity and reliability of the hypothesis.

Explanation

A hypothesis needs to be repeatedly confirmed by experimentation in order to advance to the level of a theory. This is essential in order to establish the validity and reliability of the hypothesis.