Bonjour,
j'ai un exercice mais je ne comprends pas, pourriez-vous m'aider stp.
la réacti...
Bonjour,
j'ai un exercice mais je ne comprends pas, pourriez-vous m'aider stp.
la réaction entre la craie et l'acide chlorhydrique produit un gaz. Avant réaction, on réalise la pesée schématisée ci-contre.
a:312g b:306g c:302g
sachant que l'acide chlorhydrique et le calcaire pèse 306g
Parmi les trois schémas, quel est celui qui représente correctement ce que l'on observe après avoir introduit le calcaire dans l'acide?
Answers: 1
Another question on Chemistry
Chemistry, 22.06.2019 07:40
22. a flask containing 450 ml of 0.50 m h2so4 was accidentally knocked to the floor. how many grams of nahco, do you need to put on the spill to neutralize the acid according to the following equation: h2so4(aq)+2 nahcos(aq) na,so(aq) +2 h20()+2 co2(g) d) 38 g a) 2.3 g b) 9.5 g c) 19 g
Answers: 1
Chemistry, 22.06.2019 12:20
Adeuteron, 21h, is the nucleus of a hydrogen isotope and consists of one proton and one neutron. the plasma of deuterons in a nuclear fusion reactor must be heated to about 3.02×108 k . what is the rms speed of the deuterons? express your answer using two significant figures.
Answers: 1
Chemistry, 22.06.2019 13:30
What does the xylem do? stores the glucose captures the sunlight absorbs oxygen into the leaf carries water from the roots to the leaves
Answers: 1
Chemistry, 23.06.2019 04:31
Which of the following is an example of how telecommunication devices people do their jobs? a.) a security guard checks the time using a digital watch. b.) a banker does some quick math using a solar calculator. c.) a nurse uses a digital thermometer to take a patient’s temperature. d.) a construction worker reports in to his office using a cell phone.
Answers: 1
You know the right answer?
Questions
Chemistry, 09.02.2020 23:55
Mathematics, 09.02.2020 23:55
Mathematics, 09.02.2020 23:55
History, 09.02.2020 23:55
Chemistry, 09.02.2020 23:55
Mathematics, 09.02.2020 23:55
English, 09.02.2020 23:56
Mathematics, 09.02.2020 23:56
Mathematics, 09.02.2020 23:56
Mathematics, 09.02.2020 23:56
