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How did they get the answers for #1 and 2 ???
1. What is the volume...
chemistry density Density 1. Explain why a highly precise measurement does not always means a highly...
chemistry density
Density 1. Explain why a highly precise measurement does not always means a highly accurate one. 2. Read the volume in the diagram below. Report your answer in the line, including the correct number of significant figures 60 50 mL Answer: 3. Why is the density of a substance independent on sample size? 4. Ahmed obtains a silvery metallic unknown. She masses the metal and finds that she has 60.56g. When she places the metal in a graduated...
What is the mass (in grams) of a femur (leg bone) having a volume of 118...
What is the mass (in grams) of a femur (leg bone) having a volume of 118 cc? The density of bone is 1.8 g/cc. Iron has a density of 7.8 g/cc. What is the mass, in grams, of a 4.4 cm3 piece? What is the volume (in cc) of a sample of mercury that has a mass of 20.5 g. The density of mercury is 13.6 g/cc. Aspirin has a density of 1.40 g/cc. What is the volume in cubic...
If the density of a object is 7.89 g/mL and the volume is 4.09 mL, what...
If the density of a object is 7.89 g/mL and the volume is 4.09 mL, what is the mass? Be sure your answer has the correct number of significant figures. Your Answer: ________ _______ Answer units
Calculate the volume of 88 g of a solid with a density of 6.5 g/mL. Include...
Calculate the volume of 88 g of a solid with a density of 6.5 g/mL. Include the correct unit for your answer and report your answer to the correct number of significant figures.
How did they get these answers? How much volume of 0.2 M NaOH should be added...
How did they get these answers?
How much volume of 0.2 M NaOH should be added to achieve the equivalence point? 50 mL 25 mL 20mL 15mL not listed here What's the pH of solution when you added 15 mL of 0.2 M NaOH solution to 30 mL of 0.1 M HCI solution? 16 2.8 3.8 4.8
15) Significant figures in calculations: report two answers digits displayed, an one, with at least 5...
15) Significant figures in calculations: report two answers digits displayed, an one, with at least 5 Significant hen the answer rounded to the correct number of A c figures (and, of course, display the units) oin weighs 15.79 g and is added to a graduated cylinder with 12.3 ml of water in it, causing the volume to increase to What is the density of the coin?f. units Look up the density of silver, is it possible the coin is silver?...
I don't understand how to use equation three to figure out the composition of a penny's...
I don't understand how to use equation three to figure out the
composition of a penny's zinc % and copper % using the data I
collected. Can someone show me how to do it?
Trial 2 Data Table 4: The Penny Number of pennies Total mass of pennies (g) Initial volume of water (mL) Final volume of water (mL) Volume the pennies occupy (mL) Density of a penny (g mL) Average density of a penny (g mL-1) Trial 1 25...
A 21.70 mL volume of 0.0940 M NaOH is required to reach the phenolphthalein endpoint in...
A 21.70 mL volume of 0.0940 M NaOH is required to reach the phenolphthalein endpoint in the titration of a 3.06 g sample of vinegar. a. Calculate the number of moles of acetic acid in the vinegar sample. Calculate the mass of acetic acid in the vinegar sample. The molar mass of acetic acid is 60.05 g/mol. b. Calculate the percent by mass of acetic acid in the vinegar sample. Assume the density of the vinegar is 1.00 g/mL. Express...
1. What mass of natural gas (CH4) must you burn to emit 260 kJ of heat?...
1. What mass of natural gas (CH4) must you burn to emit 260 kJ of heat? CH4(g)+2O2(g)→CO2(g)+2H2O(g) ΔH∘rxn=−802.3kJ 2.Consider the following thermochemical equation for the combustion of acetone, C3H6OC3H6O, the main ingredient in nail polish remover: C3H6O(l)+4O2(g)→3CO2(g)+3H2O(g)ΔH∘rxn=−1790kJ If a bottle of nail polish remover contains 173 mL of acetone, how much heat would be released by its complete combustion? The density of acetone is 0.788 g/mL 3.Zinc metal reacts with hydrochloric acid according to the following balanced equation: Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g) When...
Help please, I have to briefly explain how I got my answers! 1. Which one of...
Help please, I have to briefly explain how I got my
answers!
1. Which one of the following is an intenstve propanty? Mass . Temperature Length D. Volume Amount 2. Which of the items below would be considered the most dense? A. a piece of wood with a volume of 2.5 L and a mass of 12.5 kg B. a ball with a volume of 139 mL and a mass of 93 g C. a tire with a volume of...
chemistry density
Density 1. Explain why a highly precise measurement does not always means a highly accurate one. 2. Read the volume in the diagram below. Report your answer in the line, including the correct number of significant figures 60 50 mL Answer: 3. Why is the density of a substance independent on sample size? 4. Ahmed obtains a silvery metallic unknown. She masses the metal and finds that she has 60.56g. When she places the metal in a graduated...
If the density of a object is 7.89 g/mL and the volume is 4.09 mL, what is the mass? Be sure your answer has the correct number of significant figures. Your Answer: ________ _______ Answer units
How did they get these answers?
How much volume of 0.2 M NaOH should be added to achieve the equivalence point? 50 mL 25 mL 20mL 15mL not listed here What's the pH of solution when you added 15 mL of 0.2 M NaOH solution to 30 mL of 0.1 M HCI solution? 16 2.8 3.8 4.8
15) Significant figures in calculations: report two answers digits displayed, an one, with at least 5 Significant hen the answer rounded to the correct number of A c figures (and, of course, display the units) oin weighs 15.79 g and is added to a graduated cylinder with 12.3 ml of water in it, causing the volume to increase to What is the density of the coin?f. units Look up the density of silver, is it possible the coin is silver?...
I don't understand how to use equation three to figure out the
composition of a penny's zinc % and copper % using the data I
collected. Can someone show me how to do it?
Trial 2 Data Table 4: The Penny Number of pennies Total mass of pennies (g) Initial volume of water (mL) Final volume of water (mL) Volume the pennies occupy (mL) Density of a penny (g mL) Average density of a penny (g mL-1) Trial 1 25...
A 21.70 mL volume of 0.0940 M NaOH is required to reach the phenolphthalein endpoint in the titration of a 3.06 g sample of vinegar. a. Calculate the number of moles of acetic acid in the vinegar sample. Calculate the mass of acetic acid in the vinegar sample. The molar mass of acetic acid is 60.05 g/mol. b. Calculate the percent by mass of acetic acid in the vinegar sample. Assume the density of the vinegar is 1.00 g/mL. Express...
Help please, I have to briefly explain how I got my
answers!
1. Which one of the following is an intenstve propanty? Mass . Temperature Length D. Volume Amount 2. Which of the items below would be considered the most dense? A. a piece of wood with a volume of 2.5 L and a mass of 12.5 kg B. a ball with a volume of 139 mL and a mass of 93 g C. a tire with a volume of...
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