Determine the number of moles in 625 L of H2 gas at STP.

A salt is best described as a compound that is formed from the reaction between an acid and a base. a strong acid and a weak acid. a strong base and a weak base. an acid and water Save and Exit Next Submit

N2 (g) + 3H2 (g) - > 2NH3 (g) How many grams of N2 are required to produce 100.0 L of NH3 at STP a. 6.25 g b. 12.5 g c. 62.5 g d. 125.0 g

Which of these are ionic compounds? NH3, RbI, SO2, ICl, NH4Cl, SrO

What type of protection would effectively protect against alpha particles? A. Air molecules B. Human skin C. pH meter D. Uranium

Were are antibodies found

Read the given equation. Na2O2 + CO2 → Na2CO3 + O2 What volume of O2 gas is produced from 2.80 liters of CO2 at STP?

Drinking water may contain a low concentration of lead ion (Pb2) due to corrosion of old lead pipes. The EPA has determined that the maximum safe level of lead ion in water is 15 ppb.

A student examines the temperature and precipitation on a given day using a thermometer and a rain gauge. The student is measuring- A. temperature only B. climate only C. wind speed only D. specific weather conditions

Atoms - 1 2 3 4 Protons - 8 10 9 8 Neutrons - 10 9 9 11 Electrons - 8 10 9 8 Which two are isotopes of one another?

A radioactive isotope has the same number of protons as its stable parent atom, but differs in its number of what?