What is number of mole in 3.6×10²⁴ atoms of lithium (atomic number of Li=7)

What is the chemical name of the compound na2co3? use the list of polyatomic ions and the periodic table to you answer. a. sodium carbon oxide b. sodium carbonate c. sodium(ll) carbonate d. sodium oxalate

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

If a simple machine aduces the strength of a force, what must be increased? the speed of the input force the work the simple machine performs the size of the simple machine the distance over which the force is applied