Michaela lives near the railroad tracks and often hears the loud bangs associated with cars being added to trains. when a friend of hers is visiting, the friend becomes alarmed at the sounds, wondering what they are but michaela is able to reassure her friend that it is a normal train-related sound. michaela's skills, at least in this situation, are superior to her friend's.

Which of the following is a homogenous mixture? o a. a toy box filled with toys o b. blood o c. trail mix o d. spaghetti and meatballs submit

The energy released by a chemical reaction can be measured using a calorimeter. when barium hydroxide octahydrate crystals are reacted with dry ammonium chloride inside of a coffee cup calorimeter, the temperature of the 18.00 g of water in the calorimeter decreases from 30.0°c to 8.0°c. the equation for calculating energy absorbed or released by a reaction is: where q is the energy released or absorbed, m is the mass of water in the calorimeter, cp is the specific heat of water, and δt is the observed temperature change. if the specific heat of liquid water is 4.19 j/g·°c, how much energy was absorbed by the reaction?

Diamond will scratch quartz. true or false