If+the+half-life+period+of+a+first- order+reaction+in+a+is+2+minutes,+h ow+long+will+it+take+[a]+to+reach+2 5%+of+its+initial+concentration?.

Ineed this asap part i: scientific method what is the difference between science and pseudoscience? what is the scientific method?

Imagine one batch of soup (batch “a”) is made with 8.19 g/can of salt, according to the recipe, and a second batch of soup (batch “b”) is made with 8.32 g/can of salt. explain which batch would be more resistant to frost damage if it is shipped a great distance in winter and explain why.

Use the de broglie's wave equation to find the wavelength of an electron moving at 7.3 × 106 m/s. show your work. note: h = plank's constant (6.62607 x 10-34 j s)