When kay added 30 g of hydrochloric acid to 65 g of zn bubbles appeared and a white precipitate zion chloride was produced she found that the mass of the zinc chloride was 93 g since the law of conservation of matter stated that matter can’t be created or destroyed she was puzzled about the difference in mass what is the best explanation for the missing 2 g

Bubbles of hydrogen gas escaped her reaction vessel. Kay did not include all of the reaction products in her final mass determination.

It was crowded with sewer like smells. bad sewer systems

Jenny and fred both play a long note on their trombones. a stationary observer hears the sound increasing and decreasing repeatedly in loudness. which of these must be true? the sound waves from the two trombones have slightly different frequencies.the sound waves from the two trombones have the same frequency.the sound waves from the two trombones have slightly different amplitudes.the sound waves from the two trombones have the same wavelength.the sound waves from the two trombones have slightly different velocities.  lolthe answer is          the sound waves from the two trombones have slightly different frequencies.