Which is an example of a chemical reaction? A) melting ice B) rusting iron C) water evaporating D) rubbing a marker on paper

For the reaction so3 + h2o h2so4, calculate the percent yield if 500. g of sulfur trioxide react with excess water to produce 575 g of sulfuric acid.

Which of the following are drugs that are important sources of toxicity because of their wide availability, otc status, and uninformed use? a. analgesics b. anticonvulsants c. hormones d. antibiotics

Which of the statements regarding the nitrogen cycle is true? choose 1 answer: choose 1 answer: a animals obtain nitrogen through the process of cellular respiration. b atmospheric nitrogen is absorbed through the leaves of plants.

When 2.4 g zinc is added to hydrochloric acid, 450 ml of hydrogen gas form at a temperature of 32 C what is the pressure of the gas

How is a thermochemical equation different from a balanced chemical equation

Are protons positive and neutrons neutral

Why might it be useful to determine the elements that a planet or moon is made up of?

Which of these is an example of a solution A Sand stirred in water B Sugar stirred in tea C A glass of water with ice in it D Oil and vinegar in a salad dressing jar

What are properties of colloid

An unknown gas has a pressure of. 0240 atm. what is the pressure in torr?