What is the symbol and valence for Sodium?

When aluminum oxidizes in air, it forms aluminum oxide (Al2O3): 4Al (s) + 3O2 (g) →2Al2O3 (s) A 102 g sheet of aluminum oxide formed completely in excess oxygen. How many grams of aluminum were oxidized? 27 g 51 g 54 g 102 g 54 is correct answer

Which of the following is a disaccharide? A. Glucose B. Sucrose C. Fructose D. Galactose

500 ml of four different liquids are heated to 50c according to the specific heat data which liquid will cool to 35c in the shortest amount of time

The bond dissociation energy for nitrogen is 941 kj/mol. what is this value in calories

A student is quickly pipetting 129ul water and observes many bubbles in the tip. You as the second student demonstrate the correct order of steps: 1. In order to prevent bubbles, slowly let go off your thumb and release the pushbutton to aspirate. 2.

Why would the Linnaeus system not stay the same? Explain in your own words.

What element has these characteristics MgX2, Very low density, Highly reactive, Diatomic

What is the development of lymphocytes compared to other formed elements?

If you are given only the mass number of neutrons, how do we find an atomic number?

You need to make an aqueous solution of 0.223 M barium bromide for an experiment in the lab, using a 250 mL volumetric flask. How much solid barium bromide should you add?