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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...
Calculate % composition: Brass is an alloy made of copper and zinc. The density of copper...
Calculate % composition: Brass is an alloy made of copper and zinc. The density of copper is 8.96 g/mL and the density of zinc is 7.14 g/mL. If the density of a sample of brass is 8.72 g/mL, what is the percent copper in the brass? Hint: “Grandma’s chocolates” are composed of a caramel center and a chocolate coating. The measured density of a “Grandma’s chocolate” is 1.045 g/cm3. Knowing that the density of her caramel is 1.160 g/cm3 and...
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
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
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...
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 have the answers to these problems but I would like to learn how these are...
I have the answers to these problems but I would like to learn how these are solved. 1) Round off each number to 2 significant figures a) 360900 (answer is 360000) b) 0.052590 (answer is 0.053) 2) The density of titanium is 4.51 g/cm3. What is the volume (in mL) of 2.50g of titanium ? (Answer: 0.554mL)
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...
Please answer all, thank you! Part A What volume of a 0.32 M Mg(NO3)2 solution contains...
Please answer all, thank you! Part A What volume of a 0.32 M Mg(NO3)2 solution contains 92 g of Mg(NO3)2? Express your answer using two significant figures and L. Part B A 4.5 −L sample of a 5.7 M NaCl solution is diluted to 60 L . What is the molarity of the diluted solution? Express your answer using two significant figures. Part C How much of a 14.0 M HNO3 solution should you use to make 840.0 mL 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...
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
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
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...
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?...
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