Is it is a broken window a physical change or chemical change?

True or False, the central atom in a molecule is the one with the highest electron affinity.

Someone anyone give me tips to finish online homework because i have 30 assignments to do

Calculate the pH of a 0.30 M NaF solution. The Ka value for HF is 7.2*10^-4

In a desert, soil containing a mixture of sand and small rocks is exposed to wind erosion. Over time, how would the land surface change?

Is a temperature of - 300 C possible? Explain

How will increasing the pressure on the system affect this equilibrium reaction? 2H2 (g) + O2 (g) - > 2H2O (g)

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

A balloon has a volume of 2.5 L and contains 0.100 moles of Helium. Another balloon has a volume of 5.0 L. They are at the same temperature and pressure. How many moles of gas does the second balloon contain?

Why is it important to that the solid be dry before the final mass measurement?

What is 0.00055030 in Scientific form?