Are nails in a jar with water a chemical change

Which of these substances has a formula incorporating a triple bond? 1. H2O 2. NH3 3. HOF 4. C2Cl4 5. C2F4 6. H2CO 7. HOI 8. H2S 9. H2Se 10. C2H2

A carbon dioxide fire extinguisher is the best choice if an electric clothes dryer is on fire. Why would a water extinguisher not be stable for the clothes dryer fire?

Suppose that you have 23 g of silver. Also assume that this sample of silver is initially at 18 oC. What is the final temperature of this sample of silver after it absorbs 2.05 kJ of heat? csilver = 0.

Find the mass of one mole of FeSO4. Show your addition and multiplication

What is true at STP? 1) Temperature is 295 Kelvin. 2) One mole of gas occupies a volume of one liter. 3) Pressure is 1.0 atmosphere. 4) Volume is 2.4 liters

What volume would 3.01•1023 molecules of oxygen gas occupy at STP?

In most food webs there are many producers, fewer herbivores, and even fewer carnivores. Which statement best explains why there are always fewer carnivores than producers in a food web? A. There is not enough space to illustrate them. B.

Which of Deeandra observation is scientifically testable

A round, three dimensional object is a?

The energy needed to start a chemical reaction is called