How are Mg atoms and Mg ions different?

How many moles of NaCl are in 1.25 L of a 0.330 M NaCl solution?

Which substances dissolves in pure water and produces a solution that is a good conductor of electricity? 1) CaCl2 2) C6H12O6 3) N2 4) O2

The asteroid belt separates what? A) sun and the stars B) inner and outer planets C) earth and moon D) milky way from other galaxies

2CH4 + 4O2 → CO2 + 4H2O Which statement is true regarding the chemical equation? A) The equation is balanced. B) The 4 in front of the oxygen on the product side needs to be a 6 in order to be balanced.

Construct Arguments Suppose you are a construction worker. You use aluminum for a window frame, copper for wiring, and iron for nails. Use the properties of these materials to justify their specific uses.

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