Question

Помогите досчитать в карточке по химии найти N(молекул) в NaNO3 имея то что М=85г/моль, n=3моль, m=255гN(молекул) и n(моль) в H2CO3 имея то что М=62, m=0.8Найти V(в литрах) в О2 имея М=32,N= 6×10 в 23 степени, n=1, m=32найти N(молекул) n( моль) m(грамм) в SO2 имея М=64 и V=11.2​

Answer 1

Ответ:

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Answer 2

Calculations in Chemistry

To calculate the number of molecules (N), moles (n), and volume (V) in different chemical compounds, we can use the given molecular mass (M), number of moles (n), and mass (m) of the substances.

Sodium Nitrate (NaNO3)

- Given: M = 85 g/mol, n = 3 mol, m = 255 g - To find N (molecules): - We can use Avogadro's number to calculate the number of molecules: - N = n * 6.022 x 10^23 - N = 3 mol * 6.022 x 10^23 - N = 1.807 x 10^24 molecules [[1]]

Carbonic Acid (H2CO3)

- Given: M = 62, m = 0.8 g - To find n (moles): - We can use the formula n = m / M: - n = 0.8 g / 62 g/mol - n ≈ 0.0129 mol [[2]]

Oxygen (O2)

- Given: M = 32, N = 6 x 10^23, n = 1, m = 32 g - To find V (in liters): - We can use the ideal gas law equation: PV = nRT - Given that n = 1 mol and R (universal gas constant) is approximately 0.0821 L·atm/(K·mol) at standard temperature and pressure (STP), we can calculate V: - V = (nRT) / P - At STP, P = 1 atm and T = 273 K - V = (1 mol * 0.0821 L·atm/(K·mol) * 273 K) / 1 atm - V ≈ 22.4 L [[3]]

Sulfur Dioxide (SO2)

- Given: M = 64, V = 11.2 L - To find N (molecules), n (moles), and m (grams): - We can use the formula n = V / 22.4 (at STP) to find the number of moles: - n = 11.2 L / 22.4 L/mol - n = 0.5 mol [[4]] - Then, we can use the formula N = n * 6.022 x 10^23 to find the number of molecules: - N = 0.5 mol * 6.022 x 10^23 - N = 3.011 x 10^23 molecules [[5]] - Finally, we can use the formula m = n * M to find the mass: - m = 0.5 mol * 64 g/mol - m = 32 g [[6]]

These calculations provide the values for N (molecules), n (moles), and V (volume) based on the given parameters for each chemical compound.