Calculate the acid concentration of a sample of acid rain with a ph of 4.20

How many atoms of ca are present in 8.6 mg? the atomic weight of ca is 40.08 amu?

What volume of solution gives the desired moles? 0.53mol from a 7.25M solution 0.035mol from a 1.25M solution 0.0013mol from a 0.090M solution

When a soda can is dropped, it should not be immediately opened. Why? (A) The soda will squirt out because of decreased temperature. (B) The soda will squirt out because of increased temperature.

How can we find the mass of a liquid in a container

Explain what domain would best be represented by the "?" in the diagram. A) Eukarya because the organisms are all eukaryotic. B) Eukarya because the organisms are all prokaryotic. C) Bacteria because some of the organisms are autotrophs.

An element consists of two isotopes. One with a mass of 79.95 amu and an abundance of 29.9%. The second isotope has a mass of 81.95 amu with an abundance of 70.1%. What is the molar mass of this element?

Write a short paragraph using the terms static electricity and electric discharge

Question 10 A 75.0 - mL sample of 1.54*10-2 M Na2SO4 (aq) is added to 75.0 mL of 1.22*10-2 M Ca (NO3) 2 (aq). Part A What percentage of the Ca2 + remains unprecipitated? Express your answer using two significant figures.

How many milliliters of 0.50 M KOH are needed to exactly neutralize 10 milliliters of of 1.5 M HNO3 A. 5.0 mL B. 12 mL C. 25 mL D. 30 mL

What type of bond holds amino acids together?