A classroom has a volume of 278 m3. What is its volume in

km3

What feature distinguishes a neutral atom from an ion

Which of the following is not a common property or characteristic of an acid? A. Reacts with active metals to produce hydrogen gas B. Slippery feel C. Sour taste D. Reacts with a base to produce a salt

How would a fast-flowing river be most likely to move sand-sized particles of sediment? How would a fast-flowing river be most likely to move sand-sized particles of sediment? a. It would lift them and carry them downstream. b.

When chlorine and magnesium react chemically, how many chlorine atoms will combine with one magnesium atom? Write the chemical formula of the compound that is formed

Based on silicon's position on the periodic table, it has A. 14 electrons, which include 4 valence electrons in the third energy level and 10 electrons distributed over the first two energy levels. B.

The atomic mass of carbon is 12.011 g/mol. how many atoms of carbon have that exact mass? why?

Which option is true about the effect of polarity on solubility? Select all that apply. Polar solutes dissolve better in water than in oil. Polar solutes have the greatest solubility in nonpolar solvents.

Which change results in a release of energy? 1. The melting of H₂O (S) 2. The boiling of water (L) 3. The evaporation of H₂0 (L) 4. The condensation of H₂0 (G)

What changes nitrogen gas in the air to nitrogen compounds that fall to the ground

Which element has an isotope mass number of 32 and is used as an ecological tracer?