What is the SI unit that refers to the amount of a substance?

Write the correct chemical formula for the following: A. aluminum fluoride B. disulfur pentoxide C. hydrobromic acid

The process of chemical cycling is known as a biogeochemical cycle. Why was it called biogeochemical cycle? A. absorbs the chemical involved from the sediment. B. takes place over a long period of time. C.

Which best describes the mass realationships between protons, neutrons, and electrons? A) electrons and neutrons are equal is mass but protons are much larger B) protons and neutrons are relatively the same mass, whereas electrons are much lower in

UuestoNS NIU The no. of millimoles of HCl required to neutralize 10 ml of 0.2 M Na2CO3 is (a) 2.0 m mole (b) 4.0 m mole (c) 0.2 m mole (d) 0.4 m mole

What are the differences between mechanical & chemical weathering?

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?

Condension occurs in the inside of your windows in Winters, why?

How can you use Hess's law to determine a reaction's enthalpy?

7. How much energy in KJ is released when 15.0 g of steam at 100.0 degrees Celsius is condensed and then frozen to ice at 0.0 degrees Celsius?