Ben and Jerry added small pieces of magnesium to hydrochloride acid. They noticed that bubbles formed, the test tube got hot, and the the magnesium disappeared. What is a sign that a chemical reaction has taken place in this experiment

2tio2 + 4cl2 + 3c - -> co2 + 2ticl4. How many moles of chlorine cl2 will react with 4.5 moles of carbon C? A. 3.4 mol B. 6.8 mol C. 6.0 mol D. 0.67 mol

Owls do most of their hunting during the night and they have specialized cells in their eyes that provide good night vision. They can see some color, but their color vision is not highly developed.

Why is airborne and water borne chemicals both local and global issues

All plants and animals have life cycles. Hiw are the life cycle of a plant and the life cycle of an animal the same?

What does tying the arm above the elbow do?

Audrey is driving 50 miles in 2 hours what is her average speed?

Water has a specific heat of 4184 J / (kgK) how much energy is needed to increase the temperature os a kilogram of water 5C?

A student noticed while doing the neutralization experiment that the calorimeter kept getting warmer. how would this error affect the final calculation for the δhneut of each reaction? would it be overestimated, underestimated or remain unaffected?

A solution contains 45 grams of nitrogen gas and 40 grams of argon. What is the mole fraction of argon in this solution?

How is an animal cell related to tissue and organs