Predict which compound in each of the following pairs of compounds is more acidic. Explain your reasoning. a) HSO4 or HSeO4 b) H20 or H2Te c) HSO3 or HSO4

A chemist prepares a solution of nickel(II) chloride NiCl2 by measuring out 97.μmol of nickel(II) chloride into a 150.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mmol/L of the chemist's nickel(II) chloride solution. Round your answer to 2 significant digits.

Calculate the number of atoms in 264. µg of cadmium. Be sure your answer has the correct number of significant figures. Note: Reference the SI prefixes and Fundamental constants table for additional information. Cd atoms 0 x10 X

Two students were tasked to weigh 100 mg of sodium chloride (NaCI). Student A pressed the tare button after weighing the weighing paper and obtained the following data. What is the mass (g) of NaCl from Student A? Mass of weighing paper (g) 0.0011 Mass of weighing paper + NaCl (g) 0.1050 Mass of the NaCI (g) Your answer While Student B did not press the tare button after weighing the weighing paper and obtained the following data. What is the mass (g) of NaCl from Student B? * Mass of weighing paper (g) 0.0011 Mass of weighing paper + NaCI (g) 0.1010 Mass of the NaCI (g) Your answer

You have a stock solution of HCI that is 37.4 % HCl by mass and has a density of 1.20 g/mL. What volume (in mL) of the concentrated HCI solution is needed to prepare 1.518 L of 0.693 M HCI? The molar mass of HCl is 36.458 g/mol. Report your answer to 1 decimal place.

9.81m/s^2 to ft/s^2

or dividing measurements A chemistry student must write down in her lab notebook the concentration of a solution of sodium hydroxide. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: • The label on the graduated cylinder says: empty weight: 5.250 g • She put some solid sodium hydroxide into the graduated cylinder and weighed it. With the sodium hydroxide added, the cylinder weighed 75.41 g. • She added water to the graduated cylinder and dissolved the sodium hydroxide completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 37.4 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. -1 Explanation Check 2021 McGraw-Hill Education All Rights Reserved Terms of Use Privacy Accessibility Thank The # $ % & 2 3