Do wind up clocks need batteries? - like the non wired ones.

2 C2H6 + 7 02 - > 4CO2 + 6H2O If 15 g of C2H6 react with 45 g of O2, how many grams of water will be produced?

Mr. Garcia told his students to evaluate their designs as if they were engineers. Design Team 4 had (1) the most expensive design and (2) it met none of the criteria. What modifications should Design Team 4 consider for the next trial?

Describe a tropical grassland biome

Calculate the concentration of buffer components present in 295.00 mL of a buffer solution that contains 0.390 M NH4Cl and 0.390 M NH3 immediately after the addition of 1.40 mL of 6.00 M HNO3.

Which term describes a substance that increases the concentration of hydroxide ions in solution? Lewis definition of an acid Arrhenius definition of a base Bronsted-Lowry definition of a base Bronsted-Lowry definition of an acid

Only a small amount of the energy used in an incandescent light bulb (regular bulbs commonly used in households) is actually converted into light.

Suppose we want to charge a flask with 1.9 g of sugar. We put the empty flask on a balance and it is determined to weigh 450 g. Enter the weight we would expect to see on the balance when we're done adding the sugar.

The billiard ball model was working model of the atom until Thomson discovered the

9474 millimeters to centimeters using scientific notation showing work

Element 107 (Bh) is formed when nuclei of element 109 (Mt) each emit an alpha particle. Nuclei of element 107, in turn, also each emit an alpha particle, forming an atom with a mass number of 262.