Atoms of different elements have different numbers of protons. true or false.

What is the pH of a solution that is 0.10 M formic acid and 0.0065 M formate (the conjugate base) ? Ka of formic acid = 1.77 x 10-4

How can a reaction absorb energy to start but still be exothermic?

Check the concentration of chemical sanitizing dish machines by: smelling the chemical during wash cycle. watching the sanitizer dump into the water. touching a test strip to the wet surface of a dish once finished.

What color of light has the most energy and why?

In the redox conversion of Ni2 + to NiO4-, the oxidation number of Ni goes from (-2, 0, + 2) to (-1, + 1, + 7, + 9). Recall that the oxidation number of oxygen is typically - 2. 1. 0; + 9 2. + 2; + 7 3. + 2; - 1 4. - 2; + 9 5. - 2; + 7 6. 0; + 1 7.

How many moles of lithium are in 83 grams of lithium?

Ocean constitutes most of ___ of water a) Evaporation b) Precipitation c) Condensation d) Transpiration e) Sublimation Don't choose a random letter.

In the reaction, Zn + HCl-> ZnCl2 + H2, 25 grams Zn are reacted with 17.5 grams HCl. How many grams of H2 will be produced? A. 0.382 g of H2 B. 0.479 g of H2 C. 0.7865 g of H2 D. 0.484 g of H2

Is nail varnish soluble?

What is the periodic trend for atomic size from top and bottom in a group? From left to right in a period?