Which of the following is an extensive physical property?

viscosity

color

mass

density

Solve the ODE below subject to the initial condition Q (0) = 131. Q′ (t) = k (Q-70) If Q represents the quantity of ice crystals measured over time, then calculate Q at t=1 seconds for k=-0.8 / second. Enter your answer in decimal notation (only).

The states in which water occurs on earth are

4. Which has the longer wavelength: light with a frequency of 7.32 X 1014 Hz or light with a frequency of 6.0 x 1014 Hz? Explain without doing any calculations.

How do atoms of neon-20 and neon-22 differ?

How many formula units of NaNO3 are in 2.99 moles of NaNO3 (Mw. 85.00 g/mol) ?

A student states the following: "Since acetone (nail polish remover) evaporate more readily than water, one would assume that acetone has weaker intermolecular forces than water." Evaluate their claim. (2 sentences)

A catalyst can only be used once. True False

On what basis do we distinguish between substances and separate them from one another?

What is the net ionic equation for the following reaction? H2CrO4 + Ba (OH) 2

How does improving food-storage facilities make farming more sustainable? A. It decreases the amount of water needed. B. It keeps food from rotting as quickly and being wasted. C. It decreases the amount of land needed. D.