Answer the lab question ("what is the effect of temperature on the solubility of a solid in a liquid?") with a hypothesis:

Automotive airbags inflate when sodium azide decomposes explosively to its constituent elements. How many grams of sodium azide are required to produce 30.5 g of nitrogen?

Could a mixture be made up of only elements and no compounds? explain.

Which phrase describes a biotic factor? A. amount of sunlight on a field B. horses on a prairie C. water clarity D. air pressure

The pressure of a sample of a gas of constant volume 2.0 atm at 30 C. What is the pressure of the sample at 20

Label the eurkaryotic cell

There is a large increase in ionization energy between the second and the third ionization energies of a metal. What kind of ion is the metal likely to form? Include the charge in your answer.

Which of the following are true statements about equilibrium systems? For the following reaction at equilibrium: CaCO3 (s) ⇌ CaO (s) + CO2 (g) adding more CaCO3 will shift the equilibrium to the right.

How many sulfide ions are present in 23.5g of Sb2S3

2. An automobile tire has a pressure of 210 kPa at 293 K. What will be the tire pressure after driving, if the tire temperature rises to 308 K?

Students measuring the mass of a rock record 6.759 g, 6.786 g, 6.812 g, and 6.779 g. Which other measurement of the block's mass would be most precise? A. 6.702 g B. 6.781 g C. 6.605 g D. 6.858 g