Avogadro defined one mole of carbon-12 atoms to have a mass of exactly 12.0 grams. Calculate the number of hydrogen atoms in 1 mole.

A) 1.38 x 1025 atoms

B) 1.66 x 1024 atoms

C) 3.98 x 1023 atoms

D) 6.02 x 1023 atoms

If 30 g of HCl is reacted with excess NaOH, and 10g of NaCl is produced, what is the percent yield of the experiment?

Calculate the temperature change in the water upon the complete melting of the ice. Assume that all of the energy required to melt the ice comes from the water. Express your answer in terms of the initial temperature of water, T.

Which spheres are part of the earth system

Compare photons of gamma and radio radiation. which has: the longer wavelength? the greater frequency? the greater energy?

Imagine a small synthetic vesicle made from pure phospholipids enclosing an interior lumen containing 1 mM glucose and 1 mM sodium chloride. If the vesicle is placed in pure water, which of the following happens faster? A. Na + diffuses out. B.

For the baeyer-villiger oxidation of cyclohexyl methyl ketone

What will happen if the density of an object is less than the density of water?

Which cannot be separated into simpler substances? compound element solution mixture

What jobs involve chesmistry

Think about a neutral magnesium atom. Then think of a magnesium ion with a 2+charge. How are these two alike? How are they different? Be sure to use the terms proton, neutron, and electron in your answer.