C2H4 n 0,4, M 28, V 22,4, m

It looks like you are providing the molecular formula for ethylene (C2H4) along with some additional information. Let's break this down: 1. **C2H4**: This is the molecular formula for ethylene, which is an alkene. 2. **n**: This typically represents the number of moles. The density, molar mass, and volume information can be used to find n. 3. **M (Molar Mass)**: The molar mass of C2H4 is approximately 28 g/mol (which you have provided). 4. **V (Volume)**: It seems that you mentioned 22.4 L, which is the volume that one mole of an ideal gas occupies at standard temperature and pressure (STP). 5. **m**: This usually denotes mass. To calculate the mass (m) of n moles of ethylene, you would use the formula: \[ m = n \times M \] If we take \( n = 0.4 \) moles and \( M = 28 \, \text{g/mol} \): \[ m = 0.4 \, \text{mol} \times 28 \, \text{g/mol} \] \[ m = 11.2 \, \text{g} \] So, the mass (m) of 0.4 moles of C2H4 is 11.2 grams. If you are looking for additional information or have a specific question relating to these values, feel free to elaborate!