In the chemical formula 3nh4, how many total atoms of hydrogen (h) are there? 1 4 12

What are the four types of chemical reactions

1. A 99.8 mL sample of a solution that is 12.0% KI by mass (d: 1.093 g/mL) is added to 96.7 mL of another solution that is 14.0% Pb (NO3) 2 by mass (d: 1.134 g/mL).

I have 345mL of a 1.5M NaCl solution. If I boil the water until the volume of the solution is 250mL, what will the molarity of the solution be? A. 28.5M B. 1.07M C. 2.07M D. 1.5M

In the laboratory you are asked to make a 0.303 m cobalt (II) sulfate solution using 275 grams of water. How many grams of cobalt (II) sulfate should you add?

An atom of iron has 26 protons, 30 neutrons, and 23 electrons. what are its atomic number, atomic mass, and net charge?

TRY H Vele Elements y Llectron Configurations for P-Block Use the periodic table to determine the electron configuration for aluminum (AI) and arsenic (As) in noble-gas notation A [Ar]352301 [He1232206352301 [Ne]3:23p1 [Ne]352302

If you measure the mass of a model car to be 230 grams. the actual mass is 218 grams. what is your percent error.

If I have 1.9 moles of gas held at a pressure of 5 atm and in a container with a volume of 50 liters, what is the temperature of the gas?

A student measured 1.0 kcal when the student combined 99.7 mL of 3 M HCl with 100 mL of 3 M NaOH. Given that the reaction is HCl (aq) + NaOH (aq) → NaCl (aq) + H2O what was ΔHneutralization per mole of water?

Which is the odd one brass, copper, aluminum, iton, sapphire