Chemistry, 28.06.2019 14:00 spiderman66
Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. how many molecules of hydrogen gas are formed when 48.7 g of sodium are added to water? show your work. (4 points) 2na + 2h2o > 2naoh + h2 2na + 2h2o > 2naoh + h2 48.7 g ? molecules 2 mol na= 1 mol h2 1 mol na= 23g na 1 mol h2= 6.02x1023 molecules (48.7g na/1)x(1 mol na/23g na)x(1 mol h2/2mol na)x(6.02x1023/1 mol h2) (48.7)(6.02x1023)/(23)(2)= 293.174x1023 molecules can someone tell me what i did wrong?
Answers: 1
Chemistry, 22.06.2019 08:40, jaueuxsn
Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.
Answers: 2
Chemistry, 23.06.2019 03:00, mullerma
Air pressure is measured in pascals. for a professional american football game, the ball should be inflated to about 90,000 pascals. scientists studied the effects of air temperature on the pressure inside american footballs by taking these steps: 1. prepare 100 footballs. 2. measure each football's air pressure. 3. divide footballs into 10 groups. 4. place the groups in different lockers cooled to different air temperatures. 5. after 12 hours, remove the footballs from lockers. 6. measure each football's pressure again. 7. compare the new pressures to the starting pressures. what two terms best describe the variable "air pressure inside the football" in this experiment? independent, qualitative independent, quantitative dependent, qualitative dependent, quantitative
Answers: 3
Solid sodium reacts violently with water, producing heat, hydrogen gas, and sodium hydroxide. how ma...
Mathematics, 31.03.2020 01:33
Mathematics, 31.03.2020 01:33
Mathematics, 31.03.2020 01:33
Mathematics, 31.03.2020 01:33