lemonsalt9378
04.01.2020 •
Chemistry
Ascientist is studying a previously unknown chemical reaction. she concludes that it is exothermic. what must the scientist have observed?
the reaction released heat.
the reaction formed a gas.
the reaction sped up when a catalyst was added.
the reaction caused the container to get cold.
Solved
Show answers
More tips
- W Work and Career Where can you learn to be a flight attendant?...
- C Cities and Countries What time does the Metro open in Moscow?...
- S Style and Beauty How to Get Rid of Under Eye Bruises?...
- F Food and Cooking How to Calculate the Gender of Your Child with Blood?...
- C Computers and Internet IMHO: What is it, why is it important, and how to use it?...
- H Health and Medicine Effective Ways to Treat Colic in Infants...
- H Health and Medicine How to Treat the Flu: A Comprehensive Guide...
- S Style and Beauty 5 Tips for Choosing the Best Ugg Boots...
- C Computers and Internet How to Create a Folder on Your iPhone?...
- C Computers and Internet iPhone SMS Delivery Report: How to Set It Up...
Answers on questions: Chemistry
- C Chemistry Tertiary alkyl halides show SN1 reactions mostly Why?...
- C Chemistry Flame color of calcium when burning in air to form oxides...
- C Chemistry Is cf3so3- a better leaving group than ccl3so3-...
- C Chemistry Why phenol is more acidic than alcohol?...
- C Chemistry How is alkyne converted to acetone?...
- C Chemistry Perform the calculation and record the answer with the correct number of significant figures. (6.5 - 6.28) 4.71...
- C Chemistry In an experiment, the variable being tested is the question 4 options: responding variable control variable dependent variable independent variable...
- C Chemistry Which of the following steps is usually done right before making a proposed explanation during the scientific method of investigation? o ask a question o construct a hypothesis o...
- C Chemistry Read the speedometer and report the speed to the proper number of digits in miles per hour (mph) and kilometers per hour (km/h). speed: 82mph. speed: /h...
- C Chemistry What missing item would complete this alpha decay /88ra + 4/2he...
Ответ:
Ответ:
2
Explanation:
Ba(OH)2 contains two oxygen atoms
BaSO4 contains four oxygen atoms.
This means that barium sulphate contains two more oxygen atoms than barium hydroxide in its formula. This is clearly seen from the two formulae shown above.