Balance and identity the type of chemical reactions.

Mg (s) + HNO3 (aq) - > H2 (g) + Mg (NO3) 2 (aq)

When drawing a Lewis structure for a free radical, which type of atom is more likely to receive the unpaired electron?

Now dilute 10.0 mL of the 0.50 M NaCl by adding distilled water until 100 mL of solution are produced. Do the 100 mL of diluted NaCl have more, less, or the same quantity of NaCl as the original 10.0 mL of 0.50 M NaCl? more less the same

A typical virus is 5x10-6 cm in diameter. if avogadro's number of these virus particles were laid in a row, how many kilometers long would the line be?

The official web site of the Nobel Prize explains that Marie Curie's chemistry prize was partly for her discovery that the radioactivity of a substance is unaffected when it undergoes a chemical reaction.

According to Le Chatelier's principle, increasing the pressure of the system shown below will shift equilibrium to the left (towards reactants). N2 (g) + 3H2 (g) = 2NH3 (g) True or False

Hydrogen peroxide decomposes to water and oxygen at constant pressure by the following reaction: 2H2O2 (l) → 2H2O (l) + O2 (g) ΔH = - 196 kJ Calculate the value of q (kJ) in this exothermic reaction when 3.

What is the concentration of hydronium in each of the following cases: [OH-] = 10-12 M? [OH-] = 10-2 M?

Which statement best explains why elements are matter? An element is a physical substance that has mass and takes up space. Elements are pure substances that cannot be divided chemically. Each element is a pure substance composed of one type of atom.

Which of the following best describes what causes the phases of the moon? The alignment of the sun, Earth, and moon The speed of the moon around the Earth The speed of the Earth around the sun The alignment of the planets

At which temperature would atoms of a He (g) sample have the greatest average kinetic energy? (1) 25°C (3) 273 K (2) 37°C (4) 298 K