Limestone originates because of:

A. chemical precipitation

B. chemical weathering

C. physical weathering

D. biological processes

Which of the following is a probable source of Earth's magnetic field? a) The earths tides b) earths outer iron core c) the sun d) the moon

The speed of a wave on a guitar string is 100 m/s, and the frequency is 1,000 Hz. what is the wavelength of the wave?

Combustion of ethylene glycol leads to a change in internal energy (/DeltaU) of - 1189 kJ at 298 K. What is the corresponding change in enthalpy in kJ/DeltaH? HOCH_2CH_2OH (l) + 5/2 O_2 (g) → 2 CO_2 (g) + 3 H_2O (l) / DeltaU = - 1189 kJ

How many moles of hydrochloric acid (HCl) are required to produce 11.2 moles of water? Equation - HCl + NaOH - -> NaCl + H2O

Why is the sky blue and not red, even though blue light scatters more easily than red.

Is this base a physical or chemical property?

Classify each of the following aqueous solutions as a nonelectrolyte, weak electrolyte, or strong electrolyte. a) LiClO4 b) HClO c) CH3CH2CH2OH d) HClO3 e) CuSO4 f) C12H22O11

Give examples of temporaty physical change

Which of these is a source of sediment? A. Fragments of other rocks B. Chemicals and Minerals dissolve in water C. Sea shells D. All of the above

Which resonance forms of silicon dioxide contribute the most to the actual bonding?