A substance is on its fifth half-life. Which approximates the percentages of radioactive and stable isotopes, respectively? 96.9%; 3.1% 3.1%; 96.9% 12.5%; 87.5% 87.5%; 12.5% Need an answer fast

The range of all forms of radiant energy is given the name?

Which substance is acting as the Brønsted-Lowry acid in the following chemical reaction? NH4 + OH - yields NH3 + H2O A. NH4+ B. OH- C. NH3 D. H2O

What is the concentration of a solution made by diluting 85 ml of 6.0 m hcl to a final volume of 750 ml?

Ions that have the same electron configuration are called

Which elements are necessary to accomplish work? a) force, energy, displacement b) energy, cause, displacement c) force, cause, energy d) force, cause, displacement

Based on the enthalpy changes given for the reactions, which reactions are endothermic? (check all that apply) 2H2O → 2H2 + O2, ΔH = 484 kJ C + O2 → CO2, ΔH = - 394 kJ H2 + Br2 → 2HBr, ΔH = - 73 kJ 2NH3 → N2 + 3H2, ΔH = 92 kJ

Which of the following is not true about performing biological investigations reading and understanding Metric system

At 29°C, Kp = 5.3 ✕ 102 atm-2 for the following reaction. N2 (g) + 3 H2 (g) equilibrium reaction arrow 2 NH3 (g) When a certain partial pressure of NH3 (g) is put into an otherwise empty rigid vessel at 29°C, equilibrium is reached when 55.

If ice is heated at constant pressure of 0.0512 ATM will it

The sun's inner core is the hottest part of the sun true or false