Mn(NO3)2 bu javobda elementlar-3 ta, atomlar soni esa 9 ta yani (3:9 yoki 1:3) nisbatda ekan BaHPO4 bu javobda elementlar-4 ta, atomlar soni esa 7 ta yani (4:7) nisbatda ekan CaSO4 bu javobda elementlar-3 ta, atomlar soni esa 6 ta yani (3:6 yoki 1:2) nisbatda ekan Demak javob: BaHPO4 ekan 4..X moddaning NaOH bilan tasirlashuvi natijasi ...=𝑁𝐻3+𝐻2𝑂+𝑁𝑎𝐼 ko`rinishga ega. X ning molar massasini(𝑔𝑟/𝑚𝑜𝑙) hisoblang va uning formulasini aniqlang 𝑋𝑥+𝑁𝑎𝑂𝐻40=𝑁𝐻317+𝐻2𝑂18+𝑁𝑎𝐼 150 𝑥+40=17+18+150 𝑥=17+18+150−40 𝑥=145 , ( Javob: 145, 𝑁𝐻4𝐽 ) .5Bir xil massada olingan qaysi gazlarning(𝑛.𝑠ℎ.𝑑𝑎𝑔𝑖) xajmlari o`z aro teng bo`ladi ? 1) 𝑆𝑂2;2) 𝑁2;3) 𝑁2𝑂;4) 𝐶𝑂2;5) 𝐴𝑟; 1) (𝑆𝑂2) 𝑛=𝑚𝑀𝑟=20064=3.125(𝑛)∙22.4𝑙=70(𝑉) 2) (𝑁2) 𝑛=𝑚𝑀𝑟=20028=7.14(𝑛)∙22.4𝑙=160(𝑉 3) (𝑁𝑂) 𝑛=𝑚𝑀𝑟=20044=4.545(𝑛)∙22.4𝑙=101.8(𝑉) 4) (𝐶𝑂2) 𝑛=𝑚𝑀𝑟=20044=4.545(𝑛)∙22.4𝑙=101.8(𝑉) 5) (𝐴𝑟) 𝑛=𝑚𝑀𝑟=20040=5 (𝑛)∙22.4𝑙=112 (𝑉) 6) (𝑁𝑒) 𝑛=𝑚𝑀𝑟=20020=10 (𝑛)∙22.4𝑙=224 (𝑉) Demak tog`ri javob: D) 3.4
6. Modda tarkibidagi elementlaming massa ulushlari o‘nli kasrlarda, asosan (%) foizlarda ifodalanadi. 0 ‘simliklaming yashil barglarida sodir bo‘ladigan fotosintez jarayonida ishtirok etuvchi karbonat angidrid C02 dagi uglerod va kislorodning massa ulushlarini hisoblang. Yechish: C02 ning nisbiy molekular massasini hisoblaymiz: Mr(C02) = 12 -1 + 16-2=44. C02 dagi О ning massa ulushini topamiz:
