1. The molar mass of BeF2

How much heat per mole is generated in the combustion of glucose?

Consider the reaction: 2nh3 (aq) + ocl - (aq) →n2h4 (aq) + h2o (l) + cl - (aq) this three-step mechanism is proposed: nh3 (aq) + ocl - (aq) ⇌k1k2 nh2cl (aq) + oh - (aq) fast nh2ci (aq) + nh3 (aq) ⟶k3 n2h+5 (aq) + cl- - (aq) slow n2h+5 (aq) + oh -

Derek needs a tool that delivers 25.00 mL of a sodium hydroxide solution. What tool would be best for him to use?

In a short circuit as the resistance decreases what happens to the current?

Use the mass and volume data to calculate the density of liquid propane to the nearest hundredth. Mass of propane = 4,300 g Volume of propane = 10,000 mL The density of liquid propane is g/mL.

Which of the following is true about lonization? The ionic substances donate some of their atoms to the solvent. The covalent substance breaks apart into ions. The ionic substance breaks apart into ions.

Potassium iodide reacts with lead (II) nitrate in this precipitation reaction: 2 KI (aq) + Pb (NO3) 2 (aq) → 2 KNO3 (aq) + PbI2 (s) What minimum volume of 0.200 M potassium iodide solution is required to completely precipitate all of the lead in 155.

Which of the following best describes the valence electrons in a polar covalent bond? O A. The electrons are transferred to the atom with the higher electronegativity. B. The electrons are closer to the atom with the lower electronegativity. C.

Humans are protected from some infections by specialized cells which produce chemicals that

Describe the density of cold water with a high salinity compared to that of warm water with low salinity. Explain your reasoning