An element's atomic number is 87. how many protons would an atom of this element have

2 upper N upper o upper c l double-headed arrow 2 upper N upper O (g) plus upper C l subscript 2 (g). At equilibrium, the concentrations are as follows. [NOCl] = 1.4 ' 10-2 M [NO] = 1.2 ' 10-3 M [Cl2] = 2.

A sample of sodium reacts completely with 0.213 kg of chlorine, forming 351 g of sodium chloride. What mass of sodium reacted?

Why is a stirrer used during boiling?

Use the ksp values in the table to calculate the molar solubility of fe (oh) 2 in pure water

Greg's school has recently had a new gym floor put in. The old gym floor was made out of wood that was beginning to weaken. if the wood from the old gym floor was burned to generate electricity, what type of energy resource would it be? A. solar B.

Why are the internal structures of these limbs similar?

If this energy were used to vaporize water at 100 ∘C, how much water in liters could be vaporized? Assume that the density of water is 1.0 g/mL. The heat of vaporization of water at 100 ∘C is 40.7 kJ/mol.

How many moles of solid naf would have to be added to 1.0 l of 2.39 m hf?

The sun is composed entirely of oxygen and helium True or False?

What is the oxidation number for Mn in Mn2O7? (provide sign and number)