If element X has 38 protons, how many electrons does it have

Which of the following aqueous solutions are good buffer systems? 0.31 M ammonium bromide + 0.39 M ammonia 0.31 M nitrous acid + 0.25 M potassium nitrite 0.21 M perchloric acid + 0.21 M potassium perchlorate 0.16 M potassium cyanide + 0.

Plant cell synthesize energy rich organic molecules and later energy is released through the processes of

A length of 16.45 m in centimeters. Conv. Factor Set-up

How do particles of solids, liquids, and gases differ?

How are mass and weight different? mass is the space an object takes up and weight is the effect of gravity on mass. mass is the amount of matter and weight is the effect of gravity on mass.

When a solution is considered to have a high concentration of hydrogen ions (H+) is also considered to be? a) acidic b) basic c) neutral d) hot

Why does the sky change colors at sunset? 1 because the sun changes colors 2 because the atmosphere reflects colors 3 because long wavelengths are scattered the least 4 because short wavelengths are scattered the least

Consider the reaction N2 (g) + 3 H2 (g) 2 NH3 (g), which is exothermic as written. What would be the effect on the equilibrium position of adding N2 (g) ?

According to Table I, which equation represents a change resulting in the greatest quantity of energy released? 1. 2C (s) + 2H2 (g) - > C2H4 (g) 2. 2C (s) + 3H2 (g) - > C2H6 (g) 3. N2 (g) + 3H2 (g) - >2NH3 (g) 4. N2 (g) + O2 (g) - > 2NO (g)

Calculate the number of liters in 3.25 g of ammonia