A sample contains 1.29*1022 atoms of Cs. Calculate the amount of Cs.

23. Explain why children often look like their parents.

Which of the conversion factors below is the "center piece" or middle step of every stoichiometry problem? A) Molar Volume B) Molar Mass C) Mole ratio D) Avogadro's Number

What makes a pure substance different from a heterogeneous mixture? A.) The components of a pure substance are mixed unevenly instead of evenly within the pure substance. B.

A researcher is trying to create a new super conductive wire. Which category on the periodic table should he or she look in first? A) metals Eliminate B) non-metals C) metalloids D) noble gases

What is the atomic weight of carbon

An atom of beryllium (m = 8.00 u) splits into two atoms of helium (m = 4.00 u) with the release of 92.2 kev of energy. if the original beryllium atom is at rest, find the kinetic energies and speeds of the two helium atoms

The most penetrating neclear radiation is

Certain object has a mass of 60 g and a volume of 32.6 cm³ what type of objects is the density

Which of the following statements is true? A. A producer usually obtains food by hunting other organisms. B. Humans that prepare their own meals are producers. C. A producer must be a plant. D. Consumers depend upon producers for food.

If the coral and the fish were removed from the ocean ecostyem. How would the ecostyem change?