A scientist is performing an experiment on a powder. Which of the following is a sign that a chemical change has definitely occurred during his experiment?
The powder catches on fire.
The powder releases bubbles.
The powder heats up.
The powder breaks apart into smaller particles.
Answers (1)
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “A scientist is performing an experiment on a powder. Which of the following is a sign that a chemical change has definitely occurred during ...” in 📙 Chemistry if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
The atoms in a sample of an element are in excited states. A bright-line spectrum is produced when these atoms A. absorb energy B. absorb positrons C. emit energy D. emit positrons
Answers (1)
When you put the egg into the vinegar, the vinegar took the shell off the egg. Was this a physical or chemical change?
Answers (2)
A solution is prepared by dissolving sugar in water. The solution is 25% by mass, sugar. How many grams of water are in 472 grams of this solution?
Answers (2)
Balance the equation _C2H6 + _H2O = _CO2 + _H2O
Answers (1)
Salts should generally be soluble in nonpolar organic solvents. a. True b. False
Answers (1)
New Questions in Chemistry
A system consists of two components, each of which must activate if the system is to activate. One component has a reliability of. 99. The other has a reliability of. 95. The components are independent of one another with respect to reliability.
Answers (1)
Which of the following energy level changes for an electron is most energetic? 3 → 2 5 → 2 4 → 2
Answers (1)
Is baking soda a element compound homogeneous mixture or heterogeneous mixture?
Answers (1)
For the reaction: C (CH3) 3I + Cl - → C (CH3) 3Cl + I- What is the activation barrier for the SN2 reaction mechanism, in units of kcal/mol? Provide your answer to the nearest 0.1 kcal/mol.
Answers (1)
Which of the following utilizes the measurement of a short - or long-lived radioactive element, with its decay product, to determine the absolute age of an object? A. varves B. radiometric dating C. dendrochronology
Answers (1)