Name three natural chemicals and three artificial chemicals that are part of your daily life

Which statements are true of fossil fuels? Check all that apply. A. The burning of them contributes to global warming. B. They produce harmful waste. C. They come from water. D. They are renewable.

Given the following dаta: 2O3 - > 3O2 (enthalpy = - 427 kJ) O2 - > 2O (enthalpy = + 495 kJ) NO + O3 - > NO2 + O2 (enthalpy = - 199 kJ) Calculate the enthalpy for the reaction NO + O - > NO2 using Hess's Law ...?

Page 2 Question: Solve the following problem using the correct number of significant figures. * 9.37 + 48.27 + 403.88 =

Elemental phosphorus reacts with chlorine gas according to the equation: P4 (s) + 6Cl2 (g) ❝4PCl3 (l) A reaction mixture initially contains 45.55g P4 and 131.9g Cl2.

What is the most abundant salt in seawater

1.) Rust forms when Fe, O₂, and H₂O react in the balanced equation below; 2Fe (s) + O₂ (g) + 2H₂O (l) - -> 2Fe (OH) ₂ (s) In an experiment 10.0g of Fe is allowed to react with 4.00g of O₂ A.) Which of these reactants is the limiting reagent? B.

Choose the answer that takes place when a liquid absorbs heat energy without increasing its temperature. A.) the pressure increases B.) it vaporizes C.) it solidifies D.) the volume decreases

What are small round structures in the cell that breaks down large food particles into smaller ones

All elements have a unique atomic emission spectrum. In which of the following scenarios would this fact be most useful? A. when trying to determine a star's chemical composition B. when trying to determine how old an artifact is C.

How does ATP form? Why is it important to the cell?