How many moles do 5.62 x 10^23 formula units of sodium hydroxide constitute?

A. 0.934 moles

B. 1.07 moles

C. 3.38 moles

D. 3.38 x 10^47 moles

The diagram represents the general equation for photosynthesis. What does the X represent? hydrogen oxygen glucose carbon dioxide

Each element possesses unique chemical and physical properties. a. True b. False

When water vapor loses energy, it may ___ into a liquid.

When ammonium chloride and water interact, less energy is released from breaking the bonds in the water and ammonium chloride than what is required to form the bonds of the new substance. What is happening in the reaction? A.

Sometimes in lab we collect the gas formed by a chemical reaction over water (see sketch at right). This makes it easy to isolate and measure the amount of gas produced.

Write the formula of each compound, and determine its molecular (formula) mass: (a) sodium dichromate; (b) ammonium Perchlorate; (c) magnesium nitrite trihydrate.

Calculate the pH of a (0.000765) M solution of KOH

What kind of solid is crystalline boron

Cl2F2 (g) + 2NaCl (aq) = 2NaF (aq) + Cl2 (g)

Is there more than100 elements in the periodic table?