What are factors that will contribute to achieving the lowest mass/volume ratio possible for an airbag? The "mass" includes the mass of the reactants, bag, and any additional materials you would use to make the airbag. The "volume" is of the inflated air bag.

To achieve the lowest mass/volume ratio for an airbag, several factors need to be considered. Here are some key factors:

1. Material selection: The choice of materials is critical in achieving a low mass/volume ratio. Materials with high strength-to-weight ratios, such as lightweight synthetic fabrics or high-performance polymers, are commonly used for airbags. These materials ensure that the airbag can withstand the forces of impact while minimizing its weight and volume.

2. Design optimization: The design of the airbag should be optimized to minimize the overall mass and volume. This involves careful consideration of the shape, size, and thickness of the airbag. Streamlining the shape and minimizing excess material can help reduce mass and volume while maintaining effectiveness.

3. Gas selection: The type of gas used to inflate the airbag also plays a role. Typically, airbags are inflated using a gas generator that produces nitrogen gas. Nitrogen is preferred due to its low reactivity and non-flammability. By selecting the appropriate gas, the amount required to inflate the airbag can be minimized, thereby reducing the overall mass/volume ratio.

4. Efficient deployment system: The deployment system should be designed for efficient and controlled inflation. This ensures that the airbag inflates quickly and evenly, allowing for minimum gas usage and reducing unnecessary weight and volume.

5. Advanced manufacturing techniques: Utilizing advanced manufacturing techniques can help reduce the weight and volume of the airbag. Techniques such as precision cutting, welding, and adhesive bonding can optimize the assembly process, minimizing excess material and improving structural integrity.

To determine the lowest achievable mass/volume ratio for an airbag, it is essential to consider these factors collectively and conduct extensive research and development, including material testing, prototyping, and optimization iterations.