What is the importance of water on earth?

A) it keeps the top layer of the geospere cool

B) it allows life to exist

C) it provides ice at the poles

D) it creates earths blue color from space

1) If calcium were to combine with the compound barium nitrate, which member of the barium nitrate would calcium replace?

Which of the following groups contains members with similar chemical reactivity? A) SC, Y, Zr B) Li, Be, C C) C, N, O D) Be, Mg, Sr

Compare the temperature of water as ice begins to form with the temperature of ice as it begins to melt?

Calculate the velocity of a neutron needed to achieve a wavelength of 1.40 å. (take the mass of the neutron m=1.6749*10-27kg). v = m/s

How many equivalent hydrogens does ethyl acetate have?

Nonmetal oxides can react with water to form acids. For example, carbon dioxide reacts with water to form carbonic acid: CO2 H2O H2CO3. (1) Write an equation to show how diiodine pentaoxide reacts with water to form an acid. Do not include states.

If atmospheric pressure suddenly changes from 1.00 atm to 0.892 atm at 298 k, how much oxygen will be released from 4.40 l of water in an unsealed container?

Determine the molecular formula for the unknown if the molecular mass is 60.0 amu and the empirical formula is ch2o.

Draw the organic product of the following nucleophilic reaction

How does the energy of the activated complex compare with the energies of reactants and products? select one: a. it is lower than the energy of both reactants and products. b.