Question

Дано:ca(OH)m-7,4гнайти:N-?ню-?

Answer 1

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Answer 2

Calculation of N in the given equation ca(OH)m-7,4г

To find the value of N in the equation ca(OH)m-7,4г, we can use the formula:

N = m / M

where N represents the number of moles, m represents the mass, and M represents the molar mass.

Based on the given equation, we have ca(OH)m-7,4г. From this, we can infer that the compound is calcium hydroxide (Ca(OH)2) and the mass is 7.4 grams.

The molar mass of calcium hydroxide (Ca(OH)2) can be calculated as follows:

M(Ca(OH)2) = M(Ca) + 2 * M(O) + 2 * M(H)

Using the atomic masses of calcium (Ca), oxygen (O), and hydrogen (H) from the periodic table, we can calculate the molar mass:

M(Ca) = 40.08 g/mol M(O) = 16.00 g/mol M(H) = 1.01 g/mol

M(Ca(OH)2) = 40.08 + 2 * 16.00 + 2 * 1.01 = 74.16 g/mol

Now, we can substitute the values into the formula to find N:

N = m / M = 7.4 g / 74.16 g/mol = 0.0997 mol

Therefore, the value of N in the given equation ca(OH)m-7,4г is approximately 0.0997 mol.