Uri de: acid clului
faric hidroxid de sodiu, nitrat
pură, elibe
epurare a
AgNO3
are (indus-
erimentul 1. Reacții ce decurg cu formare de precipitat
cumati într-o eprubetă 1-2 ml soluție de clorură de calciu (CaCl).
unati 3-4 picături soluție de nitrat de argint (AgNO3). Agitati
continutul eprubetei. Observați formarea unui precipitat alb si brîn-
Scrieti ecuațiile moleculară și ionică ale reacției de schimb ce
are loc
(EM) 2AgNO3 + CaCl2 = 2AgCl + Ca(NO3)2
(EIC) 2Ag+ + 2NO3 + C22+ + 2C1 = 2AgCl + Ca2+ + 2NO3
(EIR) &Ag + 8C1 = {AgCi (reducem coeficienții)
precipitat alb
CaCl2
2 ml
AGCH
cează. Va
c în calea
ută prin
Impuri
vasul de
Formulați concluziile.
ontul
Ronatii a doura ou dagaiarea unui az

Ahypothrticalax type of ceramic material is known to have a density of 2.10 g/cm3 and a unit cell of cubic symmetry with a cell edge length of 0.57 nm. the atomic weights of the a and x elements are 28.5and 30.0 g/mol, respectively. on the basis of this information, which of the following crystal structures is (are) possible for this material: sodium chloride, cesium chloride, or zinc blende

14. many depressants reduce small muscle control, making it harder for a. you to steer b. your mind to consider complex problems c. the eye to scan, focus, or stay still d. the kidneys to filter alcohol out of the bloodstream

Since the gas in your graduated cylinder is a mixture of butane and water vapor, you must determine the partial pressure of the butane, pbutane, alone. to do this, consult a reference and record the partial pressure of the water vapor, pwater, at the temperature you recorded. use the following formula to compute the partial pressure of the butane. pbutane = atmosphere - pwater use the following combined gas law formula and compute the volume that the butane sample will occupy at stp. (hint: convert both temperatures to kelvin.) pbutane x voriginal = pstandard x vfinal troom tstandard use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. grams of butane you used “x” grams of butane ml of butane corrected to stp = 22,400 ml compute the theoretical molar mass of butane based on its formula and the atomic masses on the periodic table. compare your experimental results from #3 to the theoretical value of #4, computing a percent error of your findings using this formula: % error = measured value - accepted value x 100 accepted value use the following ratio and proportion formula to determine the mass of butane needed to occupy a volume of 22.4 l at stp. need asap