Which of the following indicates a chemical change?

Question 7 options:

A. an exploding firecracker

B. a freezing ice cube

C. wood breaking into splinters

D. a wire conducting electricity

In a nuclear reaction, the parent element is always radioactive. A. True B. False

How do the particle of water moves as energy passes through in a wave

How would it affect your results if you used a wet Erlenmeyer flask instead of a dry one when transferring your acid solution from the volumetric pipette?

The web site of the Nobel Prize explains that readers who want to inspect the Curies' notebooks must sign a paper that states that they are aware of the health risks that are involved with handling the notebooks.

Charged particles that move around an atom's nucleus are called

What happens to a reactant molecules when forming product molecules

Which is the atomic number of an atom with six valence electrons

O2 + CS2 → CO2 + SO2 Which of the following shows the equation balanced?

Convert 970. mm Hg to atm.

The addition of a catalyst in a chemical reaction (A) increases the concentration of products at equilibrium. (B) increases the fraction of reactant molecules with a given kinetic energy.