Chimie, întrebare adresată de Miha249, 9 ani în urmă

Cati moli si cate molecule de dioxid de carbon se gasesc in 440 g dioxid de carbon? (CO2)

Răspunsuri la întrebare

Răspuns de Pokju8888

440 g CO2            MCO2=12+2.16=44
moli CO2
g CO2                 44g CO2----------1 mol CO2
                          440 g CO2-----------X moli CO2
                           x=440:44=10 moli CO2
                                                                   23
                        1mol CO2----------6,023 .10     molecule CO2
                        10 moliCO2----------Y molecule CO2
                                                 23               23
                         Y=10.6,023 .10    =60,23.10   molecule CO2

Răspuns de puia68

aplic relatiile cu care se calculeaza numarul de moli
-din masa : n=m/M SI
-din numar de particule n= N/Na, Na= 6,023x10²³molec/mol
M= 44g/mol---> n= 440g/44g/mol= 10 mol CO2
10= N/6,023X10²³----> N=60,23X10²³ molecule CO2

se putea calcula din egalitatea m/M=N/Na

puia68: Na este numarul lui Avogadro

Pokju8888: nu Na ci N

puia68: N,a sau N,A ,trebuie sa aiba un indice pentru a-l deosebi de N

Întrebarea anterioară

Următoarea întrebare

Alte întrebări interesante

Engleza, 8 ani în urmă

Alegeti varianta corecta la Prezentul Continuu: 1. We ............... basketball in the schoolyard. a) play; b) prepare; c) ski 2. They ............... a movie in the dining-room. a) watch; b) play; c) eat 3. My friends and I ............... some flowers in the garden. a) read; b) water; c) travel 4. I ............... my homeworks at Maths. a) do; b) make; c) give 5. You ...............

Engleza, 8 ani în urmă

7. Corectati forma gresita a verbului: 1. I am makeing an apple-pie. 2. Mary is comeing from Italy today. 3. We are siting in the living-room. 4. He is geting off the bus at the first station. 5. My brother isn't writeing poems. 6. You aren't plaing with kids. 7. They are leaveing Bucharest tomorrow evening. 8. He is comeing tonight to see me. 9. She is haveing lunch at this moment.

Engleza, 8 ani în urmă

. Scrieti forma interogativa a urmatoarelor propozitii: Exemplu: I am having lunch at this moment. Am I having lunch at this moment? 1. We are playing cards. 2. Mother is washing dishes. 3. My brother is reading a newspaper. 4. We are serving breakfast. 5. They are decorating the Christmas tree. 6. My family is planning a trip to Maldive Islands these days. 7. Father is sleeping in the...