What do all elements in the same period of the periodic table have in common

A solution of HCN (aq) is made. When the solution comes to equilibrium, which of the following is true? HCN (aq) = H + (aq) + CN - (aq) with Kc = 7.9 X 10-10 A. The reaction mixture will contain mostly HCN. B.

A graduated cylinder with water has a mass of 534.26 g. The graduated cylinder itself has a mass of 214.36 g. What is the mass of just the water?

A student doing this experiment obtained the data shown in the table above. The value of the constant, k, for this data is

Sodium (na), atomic number 11, has a tendency to lose an electron in the presence of chlorine. after losing the electron, na will have ___ protons in its nucleus

If δh = - 70.0 kj and δs = - 0.400 kj/k, the reaction is spontaneous below a certain temperature. calculate that temperature.

Consider the statement, In the following process, the number of particles increases, so ΔS for this process must be positive. MgS (s) ⇄ Mg2 + (aq) + S2 - (aq) Is this statement true?

How do you read a data table?

In the manufacturing process of sulfuric acid, sulfur dioxide is reacted with oxygen to produce sulfur trioxide.

What is the pH of a solution with hydrogen ion concentration of 1 x 10^-6 M?

What fraction can be used in conversion of 32 m3 to mm3