Muscles need a stimulus from which to of the following to "tell" them contract? A. A muscle call B. The skeleton C. A nerve cell D. None of the above

21. Archaea are also called: a. Peptidophiles b. Lipidophiles c. Resistophiles d. Reservophiles e. Extremophiles

Gasoline has a density of 0.69g/cm cubed. Calculate the mass of a litre of gasoline.

Calculate the molar mass of salicylic acid, c7h6o3.

What will happen if a large quantity of NaCl is added to the aqueous solution?

A 12.8 g sample of NaOH contains how many molecules?

How much ice at a temperature of - 17.5 ∘C must be dropped into the water so that the final temperature of the system will be 31.0 ∘C?

Why does a gas fill completely the vessel in which it is kept?

Individuals who work full time and those who work part-time enjoy basically the same number of paid leave benefits. True False

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.