 Kara2006kara 
                                                19.02.2020 02:33
                                                
                                                Kara2006kara 
                                                19.02.2020 02:33
                                             elimasataeva 
                                                19.02.2020 02:33
                                                
                                                elimasataeva 
                                                19.02.2020 02:33
                                             dimanicich 
                                                19.02.2020 02:33
                                                
                                                dimanicich 
                                                19.02.2020 02:33
                                             rano09 
                                                19.02.2020 02:33
                                                
                                                rano09 
                                                19.02.2020 02:33
                                             Alexgk13 
                                                19.02.2020 02:34
                                                
                                                Alexgk13 
                                                19.02.2020 02:34
                                             Pyli03032004 
                                                19.02.2020 02:34
                                                
                                                Pyli03032004 
                                                19.02.2020 02:34
                                             nikihouston342 
                                                14.12.2020 23:19
                                                
                                                nikihouston342 
                                                14.12.2020 23:19
                                             Ewa11 
                                                14.12.2020 23:19
                                                
                                                Ewa11 
                                                14.12.2020 23:19
                                             Abdulla2009 
                                                14.12.2020 23:20
                                                
                                                Abdulla2009 
                                                14.12.2020 23:20
                                            
w(NaOH)= 40/400=0.1 (10%)