Question

Помогите решить 2 задачи по физике№1Сколько молекул содержится в углекислом газе(СО2)массой 1г?№2Найти число атомов в алюминевом предмете массой 135гЕсли можно в подробном решении а не просто ответ(заранее огромное спасибо)

Answer 1

$1. N= \frac{m}{M} N_{A}= \frac{10^{-3}}{44*10^{-3}} *6*10^{23}=1,36*10^{22}$

$2. N= \frac{m}{M} N_{A}= \frac{135*10^{-3}}{27*10^{-3}} *6*10^{23}=3*10^{24}$

Написал формулы и решение. Там видно, что писать в столбике Дано

Answer 2

Task 1: Number of molecules in carbon dioxide gas (CO2) with a mass of 1g

To find the number of molecules in carbon dioxide gas (CO2) with a mass of 1g, we need to use the concept of molar mass and Avogadro's number.

1. Calculate the molar mass of carbon dioxide (CO2): - Carbon (C) has a molar mass of 12.01 g/mol. - Oxygen (O) has a molar mass of 16.00 g/mol. - Since carbon dioxide (CO2) has one carbon atom and two oxygen atoms, the molar mass of CO2 is: Molar mass of CO2 = (1 * molar mass of C) + (2 * molar mass of O)

2. Calculate the number of moles of CO2: - The number of moles can be calculated using the formula: Moles = Mass / Molar mass In this case, the mass is 1g and the molar mass of CO2 is calculated in step 1.

3. Calculate the number of molecules: - Avogadro's number states that 1 mole of any substance contains 6.022 x 10^23 molecules. - Multiply the number of moles calculated in step 2 by Avogadro's number to find the number of molecules.

Let's calculate the number of molecules in carbon dioxide gas (CO2) with a mass of 1g:

1. Molar mass of carbon dioxide (CO2): - Molar mass of C = 12.01 g/mol - Molar mass of O = 16.00 g/mol - Molar mass of CO2 = (1 * 12.01) + (2 * 16.00) = 44.01 g/mol

2. Number of moles of CO2: - Moles = Mass / Molar mass = 1g / 44.01 g/mol ≈ 0.0227 mol

3. Number of molecules: - Number of molecules = Moles * Avogadro's number - Number of molecules = 0.0227 mol * (6.022 x 10^23 molecules/mol) ≈ 1.37 x 10^22 molecules

Therefore, there are approximately 1.37 x 10^22 molecules in carbon dioxide gas (CO2) with a mass of 1g.

[[1]]