if 5.50 mol of calcium carbide (CaC 2) reacts with an excess of water, how many moles of acetylene (C 2 H 2), a gas used in welding, will be produced? CaC2 (s) + 2H2O (l) Ca (OH) 2 (aq) + C2H2 (g)

If an increase in tematute accompanies a reaction, what occurred?

Roxanne was asked by her teacher to explain why sodium ions (Na) and chlorine ions (CI) combine into sodium chloride (NaCl). Roxanne said it was because chlorine is highly electronegative and sodium has a low ionization energy.

Earth is closest to the sun when it is summer in the a. southern h b. northern h c. western h d. eastern h

What is the molar mass of calcium oxide

Identifying compounds Caffeine is the most widely used psychoactive drug in the world and is found in coffee beans, tea leaves, cola nuts, and other plant products.

If a simple gas is collected over water. The atmospheric pressure is 778 mm and the temperature is 30°C. If the vapor pressure of water at 30 C is 31.8 mm, what is the pressure of the gas?

Select all correct answers. In the cathode ray tube experiment, J. J. Thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field.

if 5.50 mol of calcium carbide (CaC 2) reacts with an excess of water, how many moles of acetylene (C 2 H 2), a gas used in welding, will be produced? CaC2 (s) + 2H2O (l) Ca (OH) 2 (aq) + C2H2 (g)

Jamal was riding his bike home at a speed of 12 mph. On his trip out, he had travled. 8 miles away from his house. He has been travleing for a half hour at this speed

3. Which means of particle transport requires input of energy from the cell? diffusion osmosis facilitated diffusion active transport