A 675 mL sample of a gas is cooled from 75°C to 25°C at constant pressure. What is the new volume of gas?

Draw and label Bohr model for B and CI in the space below

2. 4 NH3 + 3 0₂ 2N2 + 6H₂O a. 20 moles of NHa are needed to produce - moles of 20. b. How many moles of Nz will be produced if 3.5 moles of Oz react?

Problem PageQuestion Gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water. If of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water.

An atom of germanium-69 emits a positron. Express your answer as a nuclear equation.

Which should be done when gathering questioned documents for handwriting analysis? Choose all answers that are correct. A. Store the questioned document in paper bags. B Handle the documents frequently. C Gather exemplars from potential suspects.

A solid substance turns into a liquid. Which best describes this change?

List two things you know about nonrenewable energy

Does a mole of hydrogen have the same mass as a mole of oxygen? explain your answer.

A 0.500-L sample of H₂SO₄ solution was analyzed by taking a 100.0mL aliquot and adding mL of. After the reaction occurred, an excess of ions remained in the solution. The excess base required mL of for neutralization.

Ammonia can be prepared by the reaction of magnesium nitride with water. The products are ammonia and magnesium hydroxide. Write and balance the equation.