How many valance electrons (ve) does one atom of carbon have?

a. 8 ve

b. 4 ve

c. 2 ve

d. 1 ve?

Fluoride ion is poisonous in relatively low amounts: 0.2 g of F - per 70 kg body weight can cause death. Nevertheless, in order to prevent tooth decay, F - ions are added to drinking water at a concentration of 1 mg of F - ion per L of water.

Alexandra decides to climb Mt. Krumpett, which is 5000 m high. She determines that this will require a total of 3600 kcal of energy for the trip. For her food supply, she decides to take nutrition bars.

Solid sodium carbonate, Na2CO3, reacts with sulfuric acid, H2SO4, to produce CO2 gas according to the following equation: Na2CO3 (s) + H2SO4 (aq) →CO2 (g) + H2O (l) + Na2SO4 (aq) During an experiment to produce carbon dioxide gas, a student recorded

An aqueous solution has a mass of 490 grams containing 8.5 * 10-3 gram of calcium ions. The concentration of calcium ions in this solution is 1. 4.3 ppm 2. 8.5 ppm 3. 17 ppm 4. 34 ppm

What is a non example of nucleic acids?

Which of the following animal niches will be filled as in ecosystem Begins the stage of ecological succession

List the five major pollutants in the United States

The net gain of atp per molecule of glucose fermented is

What is the name of this compound? CH3-CH2-CH2-CH2-O-C6H5 butylphenyl ether cyclohexylbutyl ether phenylbutyl ether butylcyclohexyl ether

Is the following equation balanced? 2Na + 2H2O = 2NaOH + H2 Yes No