Is the knowledge and tools that people use to manipulate their environment. a. Ethnocentrism c. Diffusion b. Technology d. Reformulation

An airbag generates 1.8g of nitrogen gas (N2, molar mass = 28.0 g/mol) at a pressure of 101.3 kPa and a temperature of 34°C. What volume, in liters, will it occupy?

Calculate the percentage yield in each of the following cases: a. theoretical yield is 50.0 g of product; actual yield is 41.9 g ans: 83.8% yield b. theoretical yield is 290 kg of product; actual yield is 270 kg ans: 93% yield

How many grams of sodium oxide can be synthesized from 17.4 g of sodium? assume that more than enough oxygen is present. the balanced equation is: 4na (s) + o2 (g) → 2na2o (s) ?

Epsom salts, a strong laxative used in veterinary medicine, is a hydrate, which means that a certain number of water molecules are included in the solid structure.

Ethanol can react with hydrochloric acid to form chloroethane and water. When sulfuric acid is added, the reaction proceeds more quickly The sulfuric acid is still present when the reaction is complete.

Which of the following processes includes all of the others? Group of answer choices transport of an ion down its electrochemical gradient osmosis passive transport facilitated diffusion

How is the Bohr atomic model different from the plum-pudding model? A. In Bohr's model, the atom's mass is found at its center instead of distributed throughout. B. In Bohr's model, the atom's mass is mostly made up of electrons instead of protons.

What does the cell theory state? A. that cells come from other cells B. that cells come only from animals C. that cells cannot be created or destroyed

For which one of the following molecules is the indicated type of hybridization not appropriate for M the central atom? a. BeCl2 sp2 b. SiH4 sp3 c. BF3 sp2 d. C2H2 sp e. H2O sp3

P4O10 (s) = - 3110 kJ/mol H2O (l) = - 286 kJ/mol H3PO4 (s) = - 1279 kJ/mol Calculate the change in enthalpy for the following process: P4O10 (s) + 6H2O (l) → 4H3PO4 (s)