A piece of platinum metal with a density of 21.5 g/cm3 has a volume of 8.89 cm3. what is its mass?

Why is respiration an exothermic reaction? A large amount of energy is released into the surroundings. The heat content, q, of the reaction is positive. A large amount of energy is required to activate the reaction.

What part of a refracting telescope would you measure to find the aperture? * the eyepiece the body the large lens the mirror

1. Why is it that some combinations of ions do not seem to react while others result in precipitate? 2. For an insoluble compound, how might you prevent formation of precipitate? 3.

In a rate law, the rate constant, k, depends on which condition

For which gases does the ratio of PV to RT equal a constant? ideal gases gases at very high pressure gases of very low temperature real gases

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

In the reaction, HCl + H2O produces H3O + Cl, what is the conjugate acid

Draw the curved arrow mechanism for the conversion of aniline into benzenediazonium ion, and draw the final product that forms after the benzenediazonium ion is treated with

Sodium chloride is stirred into water to form a solution. in this case, what are sodium chloride and the water?

What can form as a result of a chemical reaction?