Bread rising in the oven chemical or physical change

1. Zinc reacts with steam according to the equation: Zn) + H2O → ZnO + H2 What mass of zinc oxide is formed from 41.6g of zinc? + H2 (g) 2.

Which of the following is always true when a substance undergoes a physical change? a. the composition changes. b. a change in color occurs. c. no new substance is formed. d. its specific gravity remains the same.

Which organ plays a role in the digestive system but not a part of the digestive tract?

Which statement describes how Earth compares to the moon?

If you performed this experiment using mgcl2 as the solute would the molar concentration of mgcl2 that is isotonic to the potato be higher, the same or lower than the molar concentration of nacl that is isotonic to the potato? explain.

Which of the following is a renewable resource? coal wind oil natural gas

Which of the following is not a step in the conversion of 25 L to hm^3

Why can't the subscripts be changed?

What do parentheses around a group of atoms in a chemical formula indicate?

How do you make quesadillas?