Approximately how many atoms make up 1.02 moles of helium?

What is an electron configuration?

Match Match the action to the effect on the equilibrium position for the reaction N2 (g) + 3H2 (g) ⇌ 2NH3 (g). Match Term Definition Removing ammonia A) Shift to the left Removing hydrogen gas B) No effect Adding a catalyst C) Shift to the right

What is the ph of a solution whose hydroxide ion concentration, [oh-], is 4.3 * 10-4 m? mastering chemistry?

Match the salt with the acid and base used to form it in a neutralizing reaction. K2SO4 H3PO4 and NaOH KOH and H2SO4 HPO4 and KOH NaBr NaOH and HBr KOH and H2SO4 NaCl and HSO4

A 20.0-milliliter sample of HCl (aq) is completely neutralized by 32.0 milliliters of 0.50 M KOH (aq). Calculate the molarity of the HCl (aq). Your response must include both a numerical setup and the calculated result.

Which metal in Period 5 is very reactive and has two valence electrons in each atom? rubidium (RD) strontium (SI) zirconium (Z1) silver (Ag)

Sara and Sam went for a two-hour drive. According to the graph, between. 75 hours and 1.25 hours into their trip, they A) slowed down to a speed of 15km/hour. B) travelled at a constant rate of 30km/hour.

Define the following terms: acids, bases, oxoacids, oxoanions, and hydrates.

Calculate the concentration of a solution that has 6.7 moles in a volume of 0.6 liters.

Is sidewalk cement an element or a compound?