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Portfolio III (6-10)
Write the compounded formula for the following.
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- pour it 2. Still sleepy from a late night studying, you take the milk out of the refrigerator and pour it on your lemon juice to milk to make paneer (fresh cheese). As a group, craft a chemical explanation for the fact of coagulated milk onto your cereal. The last time you saw milk coagulate like that was when you added breakfast cereal. Unfortunately, by the time you notice the funny smell you have already poured clumps lemon juice to milk to make paneer (fresh cheese). As a group, craft a chemical explanation foea added that spoiled milk coagulates.3. O Be CH₂CH₂ KW дках 2) 1₂0 HO: CHI 14. M Soll Pyr 2B. Density of Liquid 1. Obtain a sample of distilled water (any quantity of your choice) anddetermine its mass and volume. Record your data on table 3 in theexperimental report 2. Calculate the density of the water sample using equation 1. Substance Density (g/mL) Substance Density (g/mL) Aluminum 2.7 Lead 11.3 Brass 8.4 Zinc 7.1 Copper 8.9 Cork 0.26 Tin 7.3 Silver 10.5 Bone 1.80 Rhodium 12.4 Iron 7.9 Platinum 21.45
- 2. Carbon dioxide (CO2) forms when coal burns in the presence of oxygen. Which of the following is the BEST evidence that a chemical reaction occurs when the coal burns? a. Production of mechanical energy c. A new substance is produced b. Production of electricity d. Formation of precipitate 3.Which of these does NOT happen during a chemical change? a. New substances are formed with different chemical properties. b. Attractive force between atoms of molecule formed or break. c. The chemical properties of the substances before and after the reaction are the same d. Energy is always released or absorbed. 4. A granular substance is added to a liquid. Which of the following would supply evidence to propose a chemical change has taken place? a. The granules dissolve completely. c. The volume of the liquid increases. b. The liquid gives off heat. d. The granules become smaller. 5. Which of the following does NOT indicate a chemical change is occurring? a.…J 1. NaOH 2. CH3CH₂COCI 1. Br₂, NaOH 2. H¹, H₂O H + IA sample of air, with a mass of 5.0 kg, contained carbon monoxide with a concentration of 12 parts per million by mass. What is the mass of carbon monoxide in this sample of air? A 6.0 × 10−2 g B 6.0 × 10−5 g C 2.4 × 10−6 g D 2.4 × 10−9 g?
- 5.) Correctly match the terms listed on the left with the substances listed on the right. More than one term may be used for each substance. A. element B. compound C. heterogeneous Mg Fe mixed with sand saltwater D. mixture water E. homogeneous F. pure substance G. Solution M9SO. 41 8 3. 5 COB. Density of Liquid 1. Obtain a sample of distilled water (any quantity of your choice) anddetermine its mass and volume. Record your data on table 3 in theexperimental report 2. Calculate the density of the water sample using equation 1 Substance Density (g/mL) Substance Density (g/mL)Aluminum 2.7 Lead 11.3Brass 8.4 Zinc 7.1 Copper 8.9 Cork 0.26Tin 7.3 Silver 10.5Bone 1.80 Rhodium 12.4Iron 7.9 Platinum 21.45 Density of Liquid Density can be determined in the laboratory by measuring the mass and volume ofa substance. To measure the density of a liquid, first measure the mass of a clean,dry beaker. Then add…Which mixture can be separated into its components by adding water then filtration? a. Potassium carbonate and sodium carbonate b. Silver nitrate and potassium iodide c. Barium sulphate and magnesium sulphate d. Silver bromide and silver sulphite
- A chemist fills a reaction vessel with 7.21 atm nitrogen (N,) gas, 6.92 atm hydrogen (H,) gas, and 1.54 atm ammonia (NH,) gas at a temperature of 25.0°C dh Data Under these conditions, calculate the reaction free energy AG for the following chemical reaction: MgO (s) -601.6 -569.3 27.0 N,(g) + 3H,(g) == 2NH,(g) Mercury Hg (g) 61.4 31.8 175.0 Use the thermodynamic information in the ALEKS Data tab. Round your answer to the nearest kild Hg (1) 75.9 Hg (s) -2.29 --- Hg22+ (aq) 153.5 --- --- Hg2Cl2 (s) -210.7 --- Nitrogen N2 (9) 191.6 N2H4 (g) 95.4 159.4 238.5 N2H4 (1) 50.6 149.3 121.2 NH3 (g) -45.9 -16.4 192.8 NH3 (1) -69.54 -26.50 95.09 NHẠNO3 (s) -365.6 -183.9 151.1 NO (g) 91.3 87.6 210.8 NO2 (9) 33.2 51.3 240.1 NOCI (g) 51.7 66.1 261.7 N204 (g) 11.1 99.8 304.4 --- HNO2 (g) -79.5 HNO3 (1) -174.1 -80.7 155.6 HNO3 (g) -133.9 -73.5 266.9 Oxygen -157.2 он (аq) Explanation Check 2021 McGraw-Hill Education. All Rights Reserved Terms of Use Privacy Accessibility F12 F10 F11 F9 F8 吕口 F3 F7 Do0…represents the mass fråctlons A В 27.29 g 6.41 g C 27.29% C 72.71% 17.09 g O. 72.71 g 100% CO2 100.0 g CO2 23.5 g CO, | 5. Which graph displays an incorrect composition relationship? a. Graph A b. Graph B c. Graph C d. All of the graphs are correct. SAMSUNG4. How do you distinguish a. Chemical properties from physical properties b. Distillation from filtration С. c. Solute from a solution d. Mixture from a compound е. Atom from a molecule
