Calculate the number of atoms in 23 g of sodium (Na).

A cartain shade of blue has a frequency of 7.23*10^14 what is the energy exactly one photon of light

Which of the following is a synthesis reaction? A.) AgNO3 + NaCl → AgCl + NaNO3 B.) BaO + H2O → Ba (OH) 2 C.) SO3 + H2O → H2SO4 D.) Cu + AgNO3 → Ag + CuNO3

A 4 liter solution of bleach with a concentration of 0.5 moles/L is diluted using an extra 4 Liters of water. What is the final concentration of the solution?

What is non stoichiometric reaction?

Which is a way that paleontologists have contributed to humans' understanding of the history of life? They found evidence that climate has not changed significantly. They grouped organisms by the period in which they existed.

Consider the reaction between barium chloride and sodium sulphate. If 25.0 mL of 0.75 M barium chloride react, how many grams of solid are produced?

Which of the following is the correct definition of nuclear energy? energy produced from the splitting of atoms energy an object has because of its motion or position energy stored in chemical bonds of molecules energy resulting from the flow of

Ethyl acetate reacts with H2, in the presence of a catalyst to yield ethyl alcohol: C4H8O2 + 2H2--> 2C2H6O. A. How many grams of ethyl alcohol are produced by reaction of 2.7 mol of ethyl acetate with H2? B.

Why is it incorrect to balance a chemical equation by changing the subscripts?

Mendeleev's arrangement of elements in the periodic table was based on the observations and experiments of his predecessors who studied mass and properties of elements. True or false?