What does elements and mixtures mean

The minimum energy required to break the oxygen-oxygen bond in oxygen is 495 kJ/mol. What is the longest wavelength of radiation that possesses the necessary energy to break this bond? What type of electromagnetic radiation is this?

How does size influence the appearance of a star? Give an example in your response.

Caculate the number if moles of the following: 800. g of Ca

What is an organism that survives on a hist organism and cuases harm to the host

Suppose a student uses 1.024 M HCl to do a titration. However, they accidentally record the molarity as 1.004 M HCl. Will the moles of acid neutralized by the tablet appear too high, too low, or unchanged?

A compound contains 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen (by mass). calculate the empirical formula.

100 g of water and 100g of metal sample are heated from 25 to 75. which substance requires more thermal energy to reach 75c

A process or reaction which takes in heat from the surroundings is said to be

What is the volume of 0.05 mol of neon gas at STP?

Which is NOT a property of gold? A. rare B. tarnishes C. malleable D. corrosion resistant