Please answer and explain these 5 groups of options/questions. (All of them I have to watch...
Please answer and explain these 5 groups of options/questions. (All of them I have to watch out for the sig fig's.)
*I requested these questions earlier in the day, and the answers were wrong. At least I got them wrong on my assignment.* Please do not respond unless you really KNOW Chemistry.
Thank you!
A. How many significant figures in the final answer of the following problem?
(6.4-5.6)/2.0
B. If a cube is 4.0 cm on all sides, what is the volume?
C. You weight 5.0 grams of sucrose and add to 25 grams of water, what is the percent by mass of sucrose?
D. 90.0 grams of salt is added to 150.00 grams of water, find the mass percent of WATER?
E.30.00 grams of salt is added to 100.00 grams of water, find the mass percent of SALT?
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Please answer and explain these 5 groups of options/questions.
(All of them I have to watch...
i need all Post Lab Questions: type in your answers to the following questions Determine what...
i need all
Post Lab Questions: type in your answers to the following questions Determine what effect the following errors would have on the value for the mass percent water for your hydrate 1. The hydrate was not heated long enough to drive off all the water a. This error will increase decrease leave unchanged the mass in grams for the suminum Eproma after heating b. The error for mass of the aluminum dish Epsom salt after heating that you...
Please break it down into steps. Simplify it, so that I understand. I have a problem...
Please break it down into steps. Simplify it, so that I understand. I have a problem with setting up thr problem & because theres two formulas for mass percent, I dont know what to use. Is there certain key words I need to look out for in order to know this ? a ) mass percent = mass of solute / mass of solution x 100% b ) mass percent = grams of solute / grams of solute + grams...
Please help me answer the following questions given the data that I obtained, and please type...
Please help me answer the following questions given the data
that I obtained, and please type your answer showing step by step
calculations and formulas please
Experiment 2: Conservation of Heat Energy – Analysis and
Discussion
Based on your experimental results, please answer the
following questions:
Given the initial and final volumes of the experiment,
determine the initial mass of the water and the mass of the ice
cube. Show your work. Record your answer in the table above.
Given...
Please answer all the questions this is the last question remaining this subscription period. I will...
Please answer all the questions this is the last question remaining this subscription period. I will give you a good review. Question 11 pts a)Water having mass= 5 kg having a temperature of 65°C is added to a container having 5 kg water at 15°C What is the final equilibrium temperature (in °C) of the mixture? b)A 6-kg piece of lead (specific heat 0.03 cal/g ×°C) having a temperature of 71°C is added to 517 g of water having a...
Please answer these 2 questions. I have solved them and my answers were not correct. Please...
Please answer these 2 questions. I have solved them and my answers were not correct. Please don't write down the answers I have written in bold font because they are not correct. I just included the wrong answers I came up so you can make sure your answers don't match to those. Thank you in advance! 1. A company buys a machine for $12,000, which it agrees to pay for in five equal annual payments, beginning one year after the...
I need all of the following questions answered completely for chapter 13. 6) Calculate the freezing...
I need all of the following questions answered completely for chapter 13. 6) Calculate the freezing point of a water solution at each of these concentration. part A) 0.75m part B) 1.25m part C) 4.5m part D) 2.15m 7) A 140-mL sample of an 8.9 M NaCl solution is diluted to 2.0L. What volume of the diluted solution contains 13.8g of NaCl? 8) A 157-mL sample of a 1.3M sucrose solution is diluted to 550mL. what is the molarity of...
*all of the questions are related, please answer all of them* 1) In the laws of...
*all of the questions are related, please answer all of them* 1) In the laws of optics experiment, a student measured the intensity of a light source at different distances with respect to the light source using a light probe. The following table shows the data collected in this experiment. r (m) I (Lux) 0.050 636.6 0.100 159.2 0.150 70.7 0.200 39.8 0.250 25.5 0.300 17.7 0.350 13.0 0.400 9.9 0.450 7.9 0.500 6.4 Plot the data using excel and...
for question #5, i divided #3 and #4 and then multiplied by 100. the answer the...
for question #5, i divided #3 and #4 and then multiplied by
100. the answer the last expert gave me with the correct sig figs
was 5.431 and it was incorrect. ive tried different variations of
the answer and i am still getting it wrong. please help
Suppose a student diluted and titrated a bleach unknown exactly as described in the experimental procedure except only a single titration was performed which required 15.04 mL of 0.100 M Na S203. The...
would yall also please help me find the excess reactant remaining for each? Also, I dont...
would yall also please help me find the excess reactant
remaining for each?
Also, I dont need much of an explanation, I understand the
processes involved with each calculation Im just scared of
answering these questions wrong and would greatly appreciate
someone elses work to compare with my own. Thanks in advance!
A sample of 5.63 g of solid calcium hydroxide is added to 37.0 mL of 0.380 M aqueous hydrochloric acid. Write the balanced chemical equation for the reaction....
Please answer all of these questions. i posted them previously and i didnt get a completed...
Please answer all of these questions. i posted them previously and
i didnt get a completed answer and also got them wrong. can you
please help me i only have one chance to get them right. thank you!
How many years will it take Rexchem, Inc., to accumulate $800,000 for a chemical feeder, if the company deposits $50,000 each year, starting one year from now, into an account that earns interest at 15% per year? (Round up your answer to...
i need all
Post Lab Questions: type in your answers to the following questions Determine what effect the following errors would have on the value for the mass percent water for your hydrate 1. The hydrate was not heated long enough to drive off all the water a. This error will increase decrease leave unchanged the mass in grams for the suminum Eproma after heating b. The error for mass of the aluminum dish Epsom salt after heating that you...
Please help me answer the following questions given the data
that I obtained, and please type your answer showing step by step
calculations and formulas please
Experiment 2: Conservation of Heat Energy – Analysis and
Discussion
Based on your experimental results, please answer the
following questions:
Given the initial and final volumes of the experiment,
determine the initial mass of the water and the mass of the ice
cube. Show your work. Record your answer in the table above.
Given...
for question #5, i divided #3 and #4 and then multiplied by
100. the answer the last expert gave me with the correct sig figs
was 5.431 and it was incorrect. ive tried different variations of
the answer and i am still getting it wrong. please help
Suppose a student diluted and titrated a bleach unknown exactly as described in the experimental procedure except only a single titration was performed which required 15.04 mL of 0.100 M Na S203. The...
would yall also please help me find the excess reactant
remaining for each?
Also, I dont need much of an explanation, I understand the
processes involved with each calculation Im just scared of
answering these questions wrong and would greatly appreciate
someone elses work to compare with my own. Thanks in advance!
A sample of 5.63 g of solid calcium hydroxide is added to 37.0 mL of 0.380 M aqueous hydrochloric acid. Write the balanced chemical equation for the reaction....
Please answer all of these questions. i posted them previously and
i didnt get a completed answer and also got them wrong. can you
please help me i only have one chance to get them right. thank you!
How many years will it take Rexchem, Inc., to accumulate $800,000 for a chemical feeder, if the company deposits $50,000 each year, starting one year from now, into an account that earns interest at 15% per year? (Round up your answer to...
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