Which element is paired with an excited-state electron configuration for an atom of the element? (1) Ca: 2-8-8-2 (2) Na: 2-8-2 (3) K: 2-6-8-3 (4) F: 2-8

What do all physical changesin science have in common

The appropriate mixing ratio for a solution to kill blood borne pathogens is 1 part chlorine to 10 parts water if you are mixing a solution in a spray bottle with 15 ounces of water how much chlorine do you need to add for the correct ratio

Which is a stiff structure outside the cell membrane

The solubility of CaCl2 in water is 25g per 50 mL of H2O. How many grams of CaCl2 will dissolved to form a saturated solution in 10 mL of water? a. 150g b. 5g c. 50g d. 0.5g

As a technician in a large pharmaceutical research firm, you need to produce 300. mL of 1.00 M a phosphate buffer solution of pH = 7.36. The pKa of H2PO4 - is 7.21. You have 2.00 L of 1.00 M KH2PO4 solution and 1.50 L of 1.

How many moles of CO will be produced, if 32.5grams of H2O are produced? C6H6S+6O2=>6CO+3H2O+SO3

Identify and briefly describe two ecosystems in your community that are beyond schoolyard

Is N2H2 a ionic compound?

What do Lewis dot structures show?

300 grams of a compound which contains only carbon, hydrogen and oxygen is analyzed and found to contain the exact same percentage of carbon as it has oxygen. The percentage of hydrogen is known to be 5.98823%.