Question

Помогите пожалуйста решить!!!В каком количестве веществ содержатся :1,204*10{23} атомов натрия Na0,602*10{23} молекул сероводорода H2S18,06*10{23} молекул кремниевой кислоты H2SiO3Сколько молекул содержится:в 0,24 моль хлороводорода HCIв 1,5 моль углекислого газа CO2в 7 моль хлорида меди CuCi2

Answer 1

n(Na) = 1,204*10^23 / 6,02*10^23 ( число Авогадро ) = 0,2 моль
n(H2S) = 0,602*10^23 / 6,02*10^23 = 0,1 моль
n(H2SiO3) = 18,06*10^23 / 6,02*10^23 = 3 моль

число= 0,24 моль * 6,02 * 10^23 = 1,4448*10^23
число=1,5 моль * 6,02*10^23 = 9,03*10^23
число= 7 моль * 6,02*10^23 = 42,14 * 10^23

Answer 2

Number of Atoms and Molecules:

To determine the number of atoms or molecules in a given amount of substance, we can use Avogadro's number, which is approximately 6.022 × 10^23. Avogadro's number represents the number of atoms, ions, or molecules in one mole of a substance.

Let's calculate the number of atoms and molecules for each substance mentioned:

1. Sodium (Na): - Number of atoms: 1.204 × 10^23 atoms - To calculate the number of moles, we divide the given number of atoms by Avogadro's number: - Moles of sodium = (1.204 × 10^23 atoms) / (6.022 × 10^23 atoms/mol) = 0.2 moles of sodium

2. Hydrogen sulfide (H2S): - Number of molecules: 0.602 × 10^23 molecules - To calculate the number of moles, we divide the given number of molecules by Avogadro's number: - Moles of hydrogen sulfide = (0.602 × 10^23 molecules) / (6.022 × 10^23 molecules/mol) = 0.1 moles of hydrogen sulfide

3. Silicic acid (H2SiO3): - Number of molecules: 18.06 × 10^23 molecules - To calculate the number of moles, we divide the given number of molecules by Avogadro's number: - Moles of silicic acid = (18.06 × 10^23 molecules) / (6.022 × 10^23 molecules/mol) = 3 moles of silicic acid

Number of Molecules in Given Amounts:

Now, let's calculate the number of molecules for the given amounts of substances:

1. Hydrochloric acid (HCl) - 0.24 moles: - To calculate the number of molecules, we multiply the number of moles by Avogadro's number: - Number of molecules = (0.24 moles) × (6.022 × 10^23 molecules/mol) = 1.445 × 10^23 molecules

2. Carbon dioxide (CO2) - 1.5 moles: - To calculate the number of molecules, we multiply the number of moles by Avogadro's number: - Number of molecules = (1.5 moles) × (6.022 × 10^23 molecules/mol) = 9.033 × 10^23 molecules

3. Copper chloride (CuCl2) - 7 moles: - To calculate the number of molecules, we multiply the number of moles by Avogadro's number: - Number of molecules = (7 moles) × (6.022 × 10^23 molecules/mol) = 4.2154 × 10^24 molecules

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