Sodium (Na) has 11 protons and 12 neutrons. What is its isotope notation?

A. Na-11

O B. Na-12

C. Na-23

D. Na-34

Which of the following is true about carbon dioxide? a.) Carbon and oxygen are chemically bonded in it. b.) Carbon and oxygen retain their original identity in it. c.) It can be separated into carbon and oxygen using physical methods. d.

Calculate the number of moles of gas that occupy a 3.45 L container at a pressure of 150 kPA and a tempeature if 45.6.

Elements are arranged by their properties on the periodic table. Arranged by their properties?

A type of anthracite contains 90% carbon by weight. How much co2 is produced from the combustion of 1 metric ton of this anthracite? How much co2 is produced from the combustion of 1 mcf (1,000,000 ft3 at standard conditions) of propane?

In medicine it is sometimes necessary to prepare solutions with a specific concentration of a given ion. A lab technician has made up 100.0 mL of a solution containing 0.50 g of NaCl and 0.30 g of KCl, as well as glucose and other sugars.

A particular brand of gasoline has a density of 0.737 g/mL at 25 ∘ C. How many grams of this gasoline would fill a 12.8 gal tank (1US gal=3.78L) ?

A pump contains 0.5 l of air at 203 kpa. you draw back on the piston of the pump, expanding the volume until the pressure reads 50.8 kpa. what is the new volume of air in the pump? 0.2 l 1.0 l 2.0 l 4.0 l

How can there be snow near a giraffe's home This is actually science so yeah

If a sealed syringe that contains some gas in heated in which direction will the syringe plunger move

Use the drop‑down menus to label the statements as either true of false. Dichloromethane is flammable. true false Methanol is flammable. Concentrated sulfuric acid is corrosive. 10% sodium carbonate solution must be used in the fume hood.