Decide which of the earlier measurements was the most accurate, and which was the most precise.

A patient is treated with hydroxychloroquine for malaria. The drug is given based on the body mass of the patient. The dosage is 0.274 MG hydroxychloroquine/ 1.65 kg body mass. Calculate the amount (in g) of the drug that would be delivered to a 98.3 kg patient in each dose

Bronze is an alloy made of copper (Cu) and tin (Sn). Calculate the mass of a bronze cylinder of radius 9.31 cm and length 36.28 cm. The composition of the bronze is 79.42 percent Cu and 20.58 percent. Sn and the densities of Cu and Sn are 8.94 g/cm3 and 7.31 g/cm3, respectively. What assumption should you make in this calculation? Enter your answer in scientific notation.

You just measured a metal cylinder and obtained the following information: mass = 3.543 g diameter = 0.53 cm height = 4.4 cm Determine the volume (V) and density of the cylinder. (V=nr2 h, where r = radius, h = height, π = 3.14) S A Volume of the cylinder = 0.87 cm3; density of the cylinder = 3.7 g/cm3 B Volume of the cylinder = 0.97 cm3; density of the cylinder = 2.7 g/cm3 C None of the above have both the volume and density correctly reported E Volume of the cylinder = 0.97 cm3; density of the cylinder = 3.7 g/cm3 Volume of the cylinder = 0.87 cm3; density of the cylinder = 2.7 g/cm3

A student was given an unknown metal.  The student determined that the mass of the metal was 30.2 g.  The student placed the metal in a graduated cylinder filled with 20.0 mL of water.  The metal increased the volume of water to 22.9 mL.  Calculate the density of the metal and determine the identity of the metal using the table below.

A brick of a certain metal has area on top of 3.54 cm x 6.93 cm. It has mass 921 g. How high is the brick in cm? The metal has density of 10.6 g/cm3 2.54 cm = 1 inch Ixhxw-V V- m/d You need to combine the above equations; this is a typical math skill you need in chemistry.

Suppose you are trying to find the volume of a box based on the given measurements for the length, width, and height of the box, where the height was measured in two parts.      length, l = 2.20 in      width, w = 3.71 in      height, h = 10.4 in + 1 in Calculate the height, ℎ, of the box, first keeping all digits, then rounding to the proper number of significant figures. unrounded h = ____in rounded h =____  in  Calculate the volume (V) of the box using V =l x w x h. Round to the proper number of significant figures.  v=_____in3

The speed of light is (2.998e8m/s) How far does light travel in 4.0μs? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols.

A Chemistry 20 student uses a thermometer and a hot plate and measures the boiling point of ethyl alcohol to be 71.1 °C. Then, she looks in a reference book and finds that the actual boiling point of ethyl alcohol is 78.4 °C. What is her percent error? Do not show your work in the space provided. Record only your final answer with the correct number of significant digits and the proper units.

In 1999, scientists discovered a new class of black holes with masses 100 to 10,000 times the mass of our sun, but occupying less space than our moon. Suppose that one of these black holes has a mass of 1×10^3 suns and a radius equal to one-half the radius of our moon. What is its density in grams per cubic centimeter? The mass of the sun is 2.0×10^30 kg and the radius of the moon is 2.16×10^3 mi (Volume of a sphere =4/3πr^3)