MLS 121 Laboratory Midterm Exam Questions & answers | Best For 2024 Exam

MLS 121 Laboratory Midterm Exam Questions & answers | Best For 2024 Exam 5/20/22, 11:47 AM MLS 121 Laboratory Midterm Exam Student Identification 0 of 0 points Kindly complete the data below. MLS 121 Laboratory Midterm Exam Total points 66/100 Good Day! The MIDTERM examination is a 100-POINT ONLINE EXAM that will utilize a Google Form. It is composed of Multiple Choice questions that is answerable within TWO HOURS ONLY. The examination shall cover Activities 3 and 4. The exam questionnaire shall be available for access through the Google Classrooms from 7:30 AM of APRIL 12, 2021 to 11:59 PM of APRIL 14, 2021. This is to ensure that you’ll be able to take the exam based on the stability of your internet access. PLEASE READ AND FOLLOW ALL INSTRUCTIONS. Requirements in answering the MIDTERM EXAMINATION: 1. Fast internet connection 2. HONESTY and INTEGRITY General Instructions: 1. Read the questions carefully. Do not rush in answering this examination. 2. Tick the option corresponding to your answer in each item. 3. Each item has one answer only. Do not tick multiple answers. 4. Remember that this is a timed assessment. Deuteronomy 31:6 "Be strong and courageous. Do not be afraid or terrified because of them, for the Lord your God goes with you; he will never leave you nor forsake you." Good luck and God bless! Last Name, First Name Middle Initial * 5/20/22, 11:47 AM MLS 121 Laboratory Midterm Exam Start of Examination 0 of 0 points Input the Time and Date started. Time MM DD YYYY Examination Proper 66 of 100 points INSTRUCTIONS: Choose the letter of the CORRECT answer for each item. Some items are worth 2 points. Class Code * Time Started * Date Started * 5/20/22, 11:47 AM MLS 121 Laboratory Midterm Exam 1/1 A. 1.42 moles of sulfur B. 0.70 moles of sulfur C. 2.13 moles of sulfur D. 1 mole of sulfur 0/1 A. 92.28 g B. 185 g C. 32.31 g D. none of these 1. How many moles of sulfur will you need to react with 1.42 moles of iron? Given the following chemical equation for thereaction: Fe (s) + S (s) → Fe 2 S 3 (s) * 2. Welding is a procedure commonly performed in building construction. It involves the use of acetylene gas to fuse metals together. Using the chemical equation below, how many grams of carbon dioxide will be produced after burning 0.0546 grams of acetylene? C2H2 (g) + O2 (g) → CO2 (g) + H2O (g) Given: acetylene= 26.04 g/mol, O=16 g/mol, CO2= 44.01 g/mol, H2O= 18.02 g/mol * 5/20/22, 11:47 AM MLS 121 Laboratory Midterm Exam 1/1 A. 7.20 g B. 79.07 g C. 79.2 g D. 0.0791 g 1/1 A. 1.0 g B. 6.0 g C. 0.03 g D. 0.6 g 1/1 A. 1.83 g B. 1.84 g C. 0.92 g D. 4.74 x 10 -4 g 3. What is the mass (in grams) of oxygen that is needed to react with 22.5 g of C7H16? Given the following:C7H16 (g)+ 11 O2 (g) → 7CO2 (g) + 8 H2O (g) C= 12 g/mol, H= 1 g/mol, O=16 g/mol * 4. How much water (in grams) will be produced if 1 g of glucose is involved in a combustion reaction? Given the following:C6H12O6 + O2 → CO2 + H2O C= 12 g/mol, H= 1 g/mol, O=16 g/mol * 5. How much CO2 (in grams) will be absorbed by each 1.0 g of LiOH? Given the following:LiOH + CO2 → Li2CO3 + H2O Li= 6.94 g/mol, O=16 g/mol. H=1.01 g/mol, C= 12.01 g/mol * 5/20/22, 11:47 AM MLS 121 Laboratory Midterm Exam 1/1 A. 2 Al + 3 Cl2 → 2AlCl3 B. HCl + NH3 → NH4Cl C. PCl3 (l) + Cl2 (g) → PCl5 (s) D. S (s) + O2 (g) → SO3 (g) 1/1 A. SO3 (g) + H2O (l) → H2SO4 (aq) B. Sb2S3 + HCl (aq) → SbCl3 (aq) + H2S (g) C. 2 N2 + 3 O2 → 2N2O3 D. N2 + O2 → 2NO 1/1 A. 2, 3, 6, 6 B. 1, 6, 2, 3 C. 3, 1, 1, 2 D. 3, 2, 2, 3 6. Which of the following chemical equations are not balanced? * 7. Which of the following chemical equations are not balanced? * 8. What is the correct combination of coefficients that will balance the following chemical equation? Fe2S3 (s) + HCl (aq) → FeCl3 (aq) + H2S (g) * 5/20/22, 11:47 AM MLS 121 Laboratory Midterm Exam 1/1 A. NaPO4 (aq) + MgCl (aq) → MgPO4 (s) + NaCl (aq) B. Na3PO4 (aq) + MgCl2 (aq) → Mg3(PO4)2 (s) + NaCl (aq) C. 2 NaPO4 (aq) +4 MgCl (aq) → 2MgPO4 (s) + 4NaCl (aq) D. 2 Na3PO4 (aq) + 3 MgCl2 (aq) → Mg3(PO4)2 (s) + 6 NaCl (aq) 1/1 A. unbalanced equation; synthesis reaction B. balanced equation; single replacement reaction C. balanced equation; combustion reaction D. balanced reaction; hydrolytic reaction 0/1 A. It has the value 6.02x1026 B. It denotes the number of molecules in 1 mole of any molecular compound. C. It is the mass, in grams, of 1 mole of any substance. D. It denotes the number of atoms in 1 mole of any substance. 9. Sodium phosphate was made to react with Magnesium chloride in order to form Magnesium phosphate and Sodium chloride. What is the correct chemical equation that represents this reaction? * 10. Which of the following options correctly describes the chemical equation? CH4 + 2O2 → CO2 + 2H2O * 11. Which statement concerning Avogadro’s number is correct? * 5/20/22, 11:47 AM MLS 121 Laboratory Midterm Exam 1/1 A. Chemical formula and Avogadro’s number B. Chemical formula and atomic masses C. Atomic masses and Avogadro’s number D. Atomic numbers and Avogadro’s number 1/1 A. 1, 2, 3 B. 2, 1, 3 C. 3, 1, 2 D. 1, 1, 3 1/1 A. 1,6,2,5 B. 1,6,6,1 C. 1,6,6,6 D. 6,6,6,2 12. Which set of quantities is needed to calculate the mass of 1 mole of a substance? * 13. When the chemical equation _____NH3