How many moles of NH4NO3 (s) must be dissolved in water so that 73.0 kJ of heat is absorbed from the water? (The molar heat of solution of NH4NO3 is 25.7 kJ/mol.)

A355-ml soft drink sample contains 0.133 mol of sucrose (table sugar). What is the molar concentration of sucrose in the beverage?

Why do many metal ions produce acidic solutions when dissolved in water?

14. How is the number of neutrons in the nucleus of an atom calculated? Add the number of electrons and protons together. Subtract the number of electrons from the number of protons. Subtract the number of protons from the mass number.

In what ways could this mountain range change over a very long period of time? Explain your reasoning

Define ionization energy. Describe how ionizacion energy impacts ionic bonding.

How many earth minutes are represented by 0.1 martian sol

Which of the following shows three elements in order of decreasing conductivity? A. Zn, Pd, Ag B. Pd, Ag, Zn C. Ag, Pd, Zn D. Zn, Ag, Pd Which of the following is the name of a metal? A. K B. Potassium chloride C. Potassium D. KCI

Which of the following describes nuclear fission? It requires extremely high temperatures to begin the reaction. It involves the combining of nuclei. It involves bonding electrons. Its chain reactions can be initiated by neutrons.

Which is a quantitative observation A. 15 m long B. red color C. rough texture D. strong odor

How many moles of Na are needed to produce moles of NaCl in the reaction below 2 Na + Cl2-->> 2 NaCl A. 2 moles B. 8 moles C. 1 mole D. 4 moles