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1. A student makes several measurements of the density of an unknown mineral sample. She then...
10. A student measured the density of copper. In 5 measurements, the density was found to...
10. A student measured the density of copper. In 5 measurements, the density was found to be 8.42 g/cm2, 8.97 g/cm2, 8.54 g/cm, 8.62 g/cm, and 8.33 g/cm. The actual mass of the unknown sample should be 8.96 g/cm2. What would be the accuracy and precision of the measurements? (a) Low accuracy, low precision (b) Low accuracy, high precision (c) High accuracy, low precision (d) High accuracy, High precision (e) Insufficient information is provided. 11. The density of ethanol is...
A student is given a sample of a manganese(II) chloride hydrate. She weighs the sample in...
A student is given a sample of a manganese(II) chloride hydrate. She weighs the sample in a dry, covered crucible and obtains a mass of 24.747 g for the crucible, cover, and sample. Earlier she had found that the crucible and cover weighed 23.599 g. She then heats the crucible to drive off the water of hydration, keeping the crucible at red heat for about 10 minutes with the cover slightly ajar. She then lets the crucible cool, and finds...
Acids and Bases 1) Which of the following is a general property of a basic solution?...
Acids and Bases 1) Which of the following is a general property of a basic solution? a. feels slippery b pH less than 7 c. tastes sour d. turns litmus paper red e. none of the above 2) If a vinegar sample has a pH of 5, the solution is which of the following: a. strongly acidic b. weakly acidic c neutral d. weakly basic e. strongly basic 3) Which of the following is a weak Arrhenius acid a. HNO3...
A student is asked to analyze a Na2CO3 sample by titrating it with HCl. He/she weighs...
A student is asked to analyze a Na2CO3 sample by titrating it with HCl. He/she weighs out 1.000 g of the unknown, dissolves it in 50 ml of deionized water, and titrates it with 0.100 M HCl. The final equivalence point (i.e., the second one for methyl orange indicator) occurs after the 24.00 mL of HCl have been added. What is the weight of Na2CO3 in the unknown? (Formula weights: Na2CO3 = 105.99 g/mole; HCl = 36.46 g/mole) A) 0.013...
1 of 2 27 Name f a liquid has a density of 2.71 what volume of...
1 of 2 27 Name f a liquid has a density of 2.71 what volume of the lquid has a mass of 45.0 g? 0.0602 mL c) 166 mL b) 122 ml 602ml How many seconds are there in seven days? 252x 10s LO1 10s a) b) 6.05x 10s 3.02x 10s d. Which of the following is true? a liquid has a definite shape a solid can be compressed easly the particles of a gas are far aparf a gas...
please explain how do this thank u 3. Carry out the following calculations. Indicate the number...
please explain how do this
thank u
3. Carry out the following calculations. Indicate the number in the calculation with the least precision (done by underlining), and indicate the answer to the correct precision. 0.0712 = 0.01424 (6) 321.00 11.23 = () 3001 = 3 0 .0142 (d) 2,12 x1.223 = (43.621-33.9) (e) 1.900 (4.123 x 0.12) 24.2 1. The following description of an experiment contains no fewer than ten measurements, some qualitative and some quantitative. Circle them and indicate...
Lab02- Measurements Name lahi Kese Lab Partners IL. Pre-Lab Questions: 1. Cite the symbolic formula for...
Lab02- Measurements Name lahi Kese Lab Partners IL. Pre-Lab Questions: 1. Cite the symbolic formula for the volume of a cylindrical solid with an outer radius, r.& length, L. en luJice y's 兀r,レ 2. Cite the symbolic formula for the volume of a cylindrical hole with an inner radius, n, & length, L. 3. Cite the symbolic formula for the volume of a cylindrical solid with an outer radius, F, which contains a cylindrical hole with an inner radius, r,&...
Question 9 1 pts Logan Roy is spending all his money income by buying mineral water...
Question 9 1 pts Logan Roy is spending all his money income by buying mineral water and popcorn. At his current consumption level, the marginal utility of mineral water is 70 and the marginal utility of popcorn is 60. The price of a bottle of mineral water is $2.00 and the price of a box of popcorn is $1.50. The utility-maximizing rule suggests that Logan should: O Increase consumption of popcorn and increase consumption of mineral water Decrease consumption of...
4. Suppose that a student performed the experiment and calculations perfectly as directed except that, unknown...
4. Suppose that a student performed the experiment and calculations perfectly as directed except that, unknown to the student, the balance was not zeroed but weighed 0.100 g too high throughout the experiment. Would the calculated val- ue for the density of the unknown liquid be correct? That is, would it be equal to, higher than, or lower than the true value. Explain your answer in clear and correct English. 16 LABORATORY EXPERIMENTS IN GENERAL CHEMISTRY ed in question 4...
1) We use this formula: [Experimental value – Theoretical value]/ [Theoretical value] to calculate: Group of...
1) We use this formula: [Experimental value – Theoretical value]/ [Theoretical value] to calculate: Group of answer choices Atomic decay Biased Error Relative percent error Efficiency Redshift 2)You measure the diameter of a cylinder 5 times and get five different values (d1, d2, d3, d4, d5.) Then, the average value would be: Group of answer choices (d1 x d2 x d3 x d4 x d5) divided by 5 (d1 + d2 + d3 + d4 + d5) divided by 5...
10. A student measured the density of copper. In 5 measurements, the density was found to be 8.42 g/cm2, 8.97 g/cm2, 8.54 g/cm, 8.62 g/cm, and 8.33 g/cm. The actual mass of the unknown sample should be 8.96 g/cm2. What would be the accuracy and precision of the measurements? (a) Low accuracy, low precision (b) Low accuracy, high precision (c) High accuracy, low precision (d) High accuracy, High precision (e) Insufficient information is provided. 11. The density of ethanol is...
A student is given a sample of a manganese(II) chloride hydrate. She weighs the sample in a dry, covered crucible and obtains a mass of 24.747 g for the crucible, cover, and sample. Earlier she had found that the crucible and cover weighed 23.599 g. She then heats the crucible to drive off the water of hydration, keeping the crucible at red heat for about 10 minutes with the cover slightly ajar. She then lets the crucible cool, and finds...
1 of 2 27 Name f a liquid has a density of 2.71 what volume of the lquid has a mass of 45.0 g? 0.0602 mL c) 166 mL b) 122 ml 602ml How many seconds are there in seven days? 252x 10s LO1 10s a) b) 6.05x 10s 3.02x 10s d. Which of the following is true? a liquid has a definite shape a solid can be compressed easly the particles of a gas are far aparf a gas...
please explain how do this
thank u
3. Carry out the following calculations. Indicate the number in the calculation with the least precision (done by underlining), and indicate the answer to the correct precision. 0.0712 = 0.01424 (6) 321.00 11.23 = () 3001 = 3 0 .0142 (d) 2,12 x1.223 = (43.621-33.9) (e) 1.900 (4.123 x 0.12) 24.2 1. The following description of an experiment contains no fewer than ten measurements, some qualitative and some quantitative. Circle them and indicate...
Lab02- Measurements Name lahi Kese Lab Partners IL. Pre-Lab Questions: 1. Cite the symbolic formula for the volume of a cylindrical solid with an outer radius, r.& length, L. en luJice y's 兀r,レ 2. Cite the symbolic formula for the volume of a cylindrical hole with an inner radius, n, & length, L. 3. Cite the symbolic formula for the volume of a cylindrical solid with an outer radius, F, which contains a cylindrical hole with an inner radius, r,&...
Question 9 1 pts Logan Roy is spending all his money income by buying mineral water and popcorn. At his current consumption level, the marginal utility of mineral water is 70 and the marginal utility of popcorn is 60. The price of a bottle of mineral water is $2.00 and the price of a box of popcorn is $1.50. The utility-maximizing rule suggests that Logan should: O Increase consumption of popcorn and increase consumption of mineral water Decrease consumption of...
4. Suppose that a student performed the experiment and calculations perfectly as directed except that, unknown to the student, the balance was not zeroed but weighed 0.100 g too high throughout the experiment. Would the calculated val- ue for the density of the unknown liquid be correct? That is, would it be equal to, higher than, or lower than the true value. Explain your answer in clear and correct English. 16 LABORATORY EXPERIMENTS IN GENERAL CHEMISTRY ed in question 4...
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