When calculating the density of liquid you measure 8.2ml in a gratuated cylinder with marking every 1 ml and measure the mass in balance 9.458g. what is the of this liquid with significant figures? consider the density calculating . if you wanted to have a more pracise density measurement typically that means spending money on better equipment . would you spend money to (a),imrove the volume measurment to 0.01ml or (b) improve the mass measurment to a 0.0001g or (c)imrove both the volume and mass measurment ? brifly explain

Adrop of acetone (nail polish remover) has a mass of 35 mg and a density of 0.788 g/cm3. what is its volume in cubic centimeters?

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

What is the wavelength of a wave with a velocity of 50 m/s and a frequency of 5hz a 250 m b 0.1 m c 10m d 0.01 m