17 The density of copper is 8.92 g/mL. The mass of a piece of copper that has a volume of 10.0 mL is a. 0.892 g b. 892 g ©89.2 g d. 8.9 x 10g

What is a primary standard?

A solution of a dye was analyzed by spectrophotometry, and the following calibration data were collected using a 1 cm cuvette. *graph in attachemnt*   Using the calibration data above for the dye solution, what is the dye concentration in a solution with an absorbance (A) = 0.52 if it was measured in a 1 cm cuvette?   Group of answer choices 3.0 x 10-6 M 6.0 x 104 M 2.0 x 10-6 M Not enough information is provided.

a. CsI 3+ Show Hint

SPECTRA FOR HOMEWORK 11, CHE 230 002 This page is not to be submitted to Gradescope. Use these spectra as you answer questions on the Homework 11 document. Spectra for Problem 1 100 %T 80 60 40 20 Relative Intensity 4000 100- 80 8 60- 40- 20- 0 20 2H 2H 3000 m/z 50.0 75.0 76.0 155.0 157.0 183.0 185.0 212.0 214.0 100.0 97.5 11.8 11.7 1686 cm 40 60 80 2000 rel, intensity 11.9 16.9 17.6 28.8 27.8 Wavenumber[cm-1] 100 120 m/z 1500 7.90 7.85 7.80 7.75 7.70 7.65 7.60 7.55 1588 cm² 20 20 ₂ مسلسل..............للمسلسل ppm 140 160 180 200 220 2H 1000 3.12 3.00 2.95 2.90 3H 500 400 A. Propose a molecular formula for this compound B. Propuse. a structure selected 1.25 1.20 1.15 201

The methodology of choice for measuring therapeutic drug levels is   Question 4 options:   immunoassay   chromatography   atomic absorption spectrophotometry   spectrophotometry

What is the R2 value for the linear regression?   Question 6 options:   0.977   0.994   0.983