A importância das plantas para os humanos

if you weigh the lauric acid to the nearest 0.1g and you weigh the unknown solid to the nearest 0.0001g, can you calculate a molar mass of your unknown solid to three significant figures? Show clearly your reasoning.

What happens to water molecules when they are heated

What is the change in the oxidation number of sulfur in the following reaction? Bi2S3 (s) + HNO3 (aq) → Bi (NO3) 3 (aq) + NO (g) + S (s) + H2O (l) A. - 3 to + 2, or + 5 B. - 2 to 0, or + 2 C. + 3 to - 3, or - 6 D. - 2 to - 3, or - 5

How many, and what color, photons are released when a single electron is fired at a single neon atom

How many hydrogen atoms are needed to form five water molecules

Electronegativity is defined as a measure of the tendency of atoms to attract electrons in a chemical bond. True False

Which statements about cirrus clouds are true? Choose all answers that are correct. A. Cirrus clouds form high in the sky. B. Cirrus clouds usually mean fair weather. C. Cirrus clouds near the ground are called fog. D.

1. While cooking, if the bottom of the vessel is getting blackened on the outside. it means that (a) the food is not cooked completely. (b) the fuel is not burning completely. (c) the fuel is wet. (d) the fuel is burning completely.

Chemists use activity series to determine whether which type of reaction will occur? combustion double replacement decomposition single replacement

What is the relationship between the location of volcanoes and earthquakes? A. Volcanoes form in areas of high earthquake activity. B. Volcanoes form on the opposite coasts from where earthquakes happen. C.