In the reaction 2Ca + O2 → 2CaO for every 2 Ca you will need how much O2? a. 1 c. 3 b. 2 d. 4

A 100.0 mL sample of 1.020 M HCl is mixed with a 50.0 mL sample of 2.040 M NaOH in a Styrofoam cup. If both solutions were initially at 24.

An element has an atomic number of 22 what is the total number of valance electrons?

How to balance this by oxidation state change method?. KMnO4 + KCl + H2SO4 - - > K2SO4 + MnSO4+Cl2+H2O

What is the average pencil brand and type students use?

If a drop of red ink is placed in one end of a shallow pan filled with water, and a drop of blue ink is placed in the other end, how will the ink be distributed at true at equilibrium?

How many moles of co2 could fit in a 475 ml bag at - 22c and 1.125 atm?

How mant atoms are in 3N2

The type of nuclear decay an unstable nucleus will undergo depends on its ratio of neutrons to protons. The radioisotope cobalt-65 has a ratio of neutrons to protons of 1.41, which is too high for a nucleus of this size.

1.87 $/gal to dollars per liter, Express your answer using three significant figures.

What can a student do to increase the force of attraction of a magnet on an iron block?