4. Calculate the error and percent error of a sample of water using the following data: the actual density of water at 23 °C is 0.999765 g mL-1 and the experimental density (at 23 °C) is 1.097 g mL-1. Show your work and watch your significant figures.

Express the result of each mathematical operation to the proper number of significant figures and with the correct unit. a) (6.521 g/mL)(0.060 mL) = 1.50 ×10 atoms b) 6.022 x 10 atoms/mole

The standard definition of a quart is equal to 947 mL. Calculate the percent error of a student's measurement if she found the experimental value of the volume of one quart of water to be equal to 938 mL.

Gaseous ethane (CH,CH,) will react with gaseous oxygen (O2) to produce gaseous carbon dioxide (CO2) and gaseous water (H,O). Suppose 0.601 g of ethane is mixed with 2.9 g of oxygen. Calculate the maximum mass of water that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits. g x10 ?

A student prepares a 0.70 mM aqueous solution of butanoic acid (C,H,CO2H). Calculate the fraction of butanoic acid that is in the dissociated form in his solution. Express your answer as a percentage. You will probably find some useful data in the ALEKS Data resource. Round your answer to 2 significant digits. ① % X 나

How will each of the following experimental errors influence the results of your calculated densities you reported? State whether the error will tend to make your density results too large, too small or unchanged. Explain why this would occur by identifying which measurements would be affected (high or low) and how this would affect the calculated density. Use the followingIn method 2, the metal cylinder you used had a number of air bubbles on its when immersed in the water

Before investigating the scene, the technician must dilute the luminol solution to a concentration of 5.00 x 10-2 M. The diluted solution is then placed in a spray bottle for application on the desired surfaces. How many moles of luminol are present in 2.00 L of the diluted spray? Express your answer with the appropriate units.

A chemist makes 380.mL of magnesium fluoride MgF2 working solution by adding distilled water to 20.0mL of a 18.8μmolL stock solution of magnesium fluoride in water. Calculate the concentration of the chemist's working solution. Round your answer to 3 significant digits.

11 of 11 I Review | Constants Periodic Table Suppose that you want to find the equation for a line that passes through the two points (0,3) and (4, 9). What is the slope of this line? Express your answer numerically. > View Available Hint(s) Πνα ΑΣΦ ? m = Submit rt C Complete previous part(s) 9:41 PM 36%

A student standardized a sodium hydroxide solution with KHP and calculated that the concentration of the sodium hydroxide solution was 0.1001 M. If the solution's concentration was 0.1701 M, what is the relative percent error in the student's result? Anser with two decimal places. ANS Your Answer: Answer I units ly