BACE exam questions 2023

4.651 x 10^4 written in expanded form is - 46,510 What is 5.78 x 3.13, rounded to the correct number of significant digits? - 18.1 What is 4.202 x 0.806, rounded to the correct number of significant digits? - 3.39 How many grams is 2.6 kg? - 2600 How many milliliters is 0.725L? Group of answer choices - 725 Your supervisor provides you with a 1.0 mg/mL solution of Bovine Serum Albumin (BSA), and asks you to make a 5-step 2-fold serial dilution. What would be the dilution factor at step 3? - 1:8 You are given a 5.0 mg/mL protein standard solution, and asked to prepare a 5-step, 2-fold serial dilution to create a standard curve. What is the final concentration of protein standard in mg/mL? Record the correct amount to three decimal places. - 0.156 You are given a 5.0 mg/mL protein standard solution, and asked to prepare a 5-step, 2-fold serial dilution to create a standard curve. After the third step of the dilution, what is the concentration of the protein standard, in mg/mL? Record the correct amount to two decimal places. - 0.63 Your supervisor provides you with a 1.0 mg/mL solution of Bovine Gamma Globulin (BGG). What is the dilution factor if you add 150 µL of 1.0 mg/mL BGG to 150 µL of diluent? - 1:2 A technician is asked to prepare a dilution of a common laboratory disinfectant. The label indicates that a 1:29 dilution in water is required prior to use. Using the simple dilution method, calculate the volume in mL of disinfectant required to make 1.0 L. Record the answer to one decimal place below - 34.5