Question

Химики откликнитесь!!!!!!!! Третий раз прошу о помощи, никто не откликается((((Решите пожалуйста два задания:1)Какие массы вещ-в SO2 и SO3 содержат одинаковое число молекул????2)Какому количеству вещ-ва соответствует:а) 132 кг CO2;б) 0,342 г Al2(SO4)3;в) 30*10 в 23 степени атомов Р????

Answer 1

1)Обинаковое число молекул будет у веществ если у них будет одинаковое химическое количество.
Пусть химическое количество равно 1моль n=1моль.Найдём Mr веществ т.к m=n*Mr
Mr(SO2)=32+16*2=64г/моль
Mr(SO3)=32+3*16=80г/моль
Значит массы веществ должны быть
m(SO2)=1*64=64г
m(SO3)=80г
При таких массах у веществ одиноковое число молекул.
2)
а) n=m/Mr
Mr(CO2)|12+32=44г/моль
m=132кг=132000г
n(CO2)=132000/44=3000моль
б)n=m/Mr
Mr(Al2(SO4)3)=27*2+3*32+12*16=342г/моль
n(Al2(SO4)3)=0.342/342=0.001моль
в)

Answer 2

Masses of SO2 and SO3 with the same number of molecules

To determine the masses of SO2 and SO3 that contain the same number of molecules, we need to consider the molar masses of each compound. The molar mass of SO2 (sulfur dioxide) is approximately 64.06 g/mol, while the molar mass of SO3 (sulfur trioxide) is approximately 80.06 g/mol.

To find the masses of SO2 and SO3 with the same number of molecules, we can use the concept of molar ratios. The molar ratio between SO2 and SO3 is 2:3, which means that for every 2 moles of SO2, there are 3 moles of SO3.

Let's assume that the number of molecules is the same for both compounds. Since the molar ratio is 2:3, we can set up the following equation:

(mass of SO2) / (molar mass of SO2) = (mass of SO3) / (molar mass of SO3)

Solving this equation will give us the masses of SO2 and SO3 with the same number of molecules.

Conversion of masses to quantities of substances

To convert masses to quantities of substances, we need to use the concept of molar mass. The molar mass of a substance is the mass of one mole of that substance and is expressed in grams per mole (g/mol).

To convert a given mass of a substance to the corresponding quantity of that substance, we can use the following equation:

(quantity of substance) = (mass of substance) / (molar mass of substance)

Let's apply this equation to the given quantities of substances:

a) 132 kg CO2: The molar mass of CO2 is approximately 44.01 g/mol. To convert the mass from kg to g, we multiply by 1000: (quantity of CO2) = (132 kg) * (1000 g/kg) / (44.01 g/mol)

b) 0.342 g Al2(SO4)3: The molar mass of Al2(SO4)3 is approximately 342.15 g/mol. To convert the mass from g to mol, we divide by the molar mass: (quantity of Al2(SO4)3) = (0.342 g) / (342.15 g/mol)

c) 30 * 10^23 atoms of P: To convert the number of atoms to moles, we divide by Avogadro's number (6.022 * 10^23 mol^-1): (quantity of P) = (30 * 10^23 atoms) / (6.022 * 10^23 mol^-1)

Please note that the given quantity of substance in part c) is expressed in terms of atoms, not grams.

I hope this helps! Let me know if you have any further questions.