Chemistry
1. Errors maybe introduced in a mass determination experiment when weighing very hot or very cold objects”.
An object that weighs 10.045 g at room temperature may end up weighing _______ when it becomes very cold (select the correct answer):
a) 9.085 g.
b) 10.160 g.
c) 20.045 g.
Explain your answer
Homework Answers
An object that weighs 10.045 g at room temperature may end up weighing _______ when it becomes very cold (select the correct answer): a) 9.085 g. b) 10.160 g. c) 20.045 g. Explain your answer
An object that weighs 10.045 g at room temperature may end up weighing _______ when it becomes very cold(select the correct answer):a) 9.085 g.b) 10.160 g.c) 20.045 g.Explain your answer
Choose the correct statement below regarding heat and temperature. When a hot object is placed in...
Choose the correct statement below regarding heat and temperature. When a hot object is placed in contact with a cold object, it loses heat until it reaches the temperature of that cold object. Heat is energy that is transferred between objects. The temperature of an object is related to its kinetic energy - increasing the temperature increases the mass in the kinetic energy equation. Only kinetic energy can be transformed into heat energy.
please do Asap. 5. In the figure below, a magical red object has temperature 70°C and...
please do Asap.
5. In the figure below, a magical red object has temperature 70°C and the blue object has temperature 20°C. Both objects have the same mass of 200 g and specific heat of both objects is 386 J/kg. K. When insulating barrier is removed, the system (of the red and blue objects) eventually comes to equilibrium temperature. Find entropy change for (a) red object (b) blue object, and (c) the system consisting of red and blue object. [pts...
MULTIPLE CHOICE |18 pt-3 pt each): In this section, you are expected to select the best...
MULTIPLE CHOICE |18 pt-3 pt each): In this section, you are expected to select the best answer out of the optionsgiven. No partial credit will be given. Only one answer may be chosen ifthe answer is not obvious it will be considered incomplete. When heating a solution, a scientist detects a temperature increase in the solution overtime. Which of the following statements accurately characterizes the solution during this period? 1. The solution is at its boiling point The velocity of...
When two objects are in thermal contact heat energy is transferred from the hot to the...
When two objects are in thermal contact heat energy is transferred from the hot to the cold object until the temperature of both becomes equal (i.e., the objects are in thermal equilibrium). Suppose you pour 20-gram milk at 200C into a cup of 80-gram tea at 920C. Assume the specific heat of tea is 4.2 J/gram.0K and that of milk is 3.9 J/gram.0K Assuming no heat is lost into the surrounding air what is the temperature of the tea and...
Calculate Part E all the information is given Part E. Determination of a Calorimeter Constant A...
Calculate Part E all the information is given
Part E. Determination of a Calorimeter Constant A student doing a calorimetry experiment similar to this one is asked to find the calorimeter constant for the calorimeter he is using. Cold water is added to the calorimeter, the temperature is measured. Water is heated on a hot plate. The temperature is measured. Some hot water is added to the calorimeter with the cold water. The final temperature is measured taken along the...
Mary conducts an experiment in which she pours a clear, colorless liquid into a beaker containing...
Mary conducts an experiment in which she pours a clear, colorless liquid into a beaker containing an aqueous solution. All of the properties below could indicate that a chemical change has occurred in her experiment EXCEPT which choice? Select the correct answer below: A cloudy white solid appeared suddenly in her solution. The cold beaker became very hot as soon as the liquids came into contact. The beaker began to smell like rotten eggs. The temperature of the beaker dropped...
Can someone please help with these 2 parts? All I know is part A is NOT...
Can someone please help with these 2 parts? All I know is part A
is NOT "none of the listed objects"
Part a A violinist in an orchestra plays the note middle A (440Hz). Which of the following objects will cast a substantial "sound shadow", blocking the sound of the note from being heard behind the object? Assume room temperature air Select the correct answer O of 3 attempts used O A column, 50cm across O The conductor, approximately 30cm...
Can someone please help with these 2 parts? Part a A violinist in an orchestra plays...
Can someone please help with these 2 parts?
Part a A violinist in an orchestra plays the note middle A (440Hz). Which of the following objects will cast a substantial "sound shadow", blocking the sound of the note from being heard behind the object? Assume room temperature air Select the correct answer O of 3 attempts used O A column, 50cm across O The conductor, approximately 30cm across CHECK ANSWER None of the listed objects O All of the listed...
Molecular Mass of a Volatile Liquid 1. The atmospheric pressure of a hot summer day in...
Molecular Mass of a Volatile Liquid 1. The atmospheric pressure of a hot summer day in NYC is 29.94 inHg. Calculate this value in mmile and am 2. The atmospheric pressure of a cold winter day in NYC is 25.94 inHg. Calculate this value in Pa. 3. We set up an experiment utilizing the Dumas method to calculate the molar mass of an unknown chemical. A 4.00 mL pure liquid sample of this chemical is vaporized in an Erlenmeyer flask...
Choose the correct statement below regarding heat and temperature. When a hot object is placed in contact with a cold object, it loses heat until it reaches the temperature of that cold object. Heat is energy that is transferred between objects. The temperature of an object is related to its kinetic energy - increasing the temperature increases the mass in the kinetic energy equation. Only kinetic energy can be transformed into heat energy.
please do Asap.
5. In the figure below, a magical red object has temperature 70°C and the blue object has temperature 20°C. Both objects have the same mass of 200 g and specific heat of both objects is 386 J/kg. K. When insulating barrier is removed, the system (of the red and blue objects) eventually comes to equilibrium temperature. Find entropy change for (a) red object (b) blue object, and (c) the system consisting of red and blue object. [pts...
MULTIPLE CHOICE |18 pt-3 pt each): In this section, you are expected to select the best answer out of the optionsgiven. No partial credit will be given. Only one answer may be chosen ifthe answer is not obvious it will be considered incomplete. When heating a solution, a scientist detects a temperature increase in the solution overtime. Which of the following statements accurately characterizes the solution during this period? 1. The solution is at its boiling point The velocity of...
Calculate Part E all the information is given
Part E. Determination of a Calorimeter Constant A student doing a calorimetry experiment similar to this one is asked to find the calorimeter constant for the calorimeter he is using. Cold water is added to the calorimeter, the temperature is measured. Water is heated on a hot plate. The temperature is measured. Some hot water is added to the calorimeter with the cold water. The final temperature is measured taken along the...
Can someone please help with these 2 parts? All I know is part A
is NOT "none of the listed objects"
Part a A violinist in an orchestra plays the note middle A (440Hz). Which of the following objects will cast a substantial "sound shadow", blocking the sound of the note from being heard behind the object? Assume room temperature air Select the correct answer O of 3 attempts used O A column, 50cm across O The conductor, approximately 30cm...
Can someone please help with these 2 parts?
Part a A violinist in an orchestra plays the note middle A (440Hz). Which of the following objects will cast a substantial "sound shadow", blocking the sound of the note from being heard behind the object? Assume room temperature air Select the correct answer O of 3 attempts used O A column, 50cm across O The conductor, approximately 30cm across CHECK ANSWER None of the listed objects O All of the listed...
Molecular Mass of a Volatile Liquid 1. The atmospheric pressure of a hot summer day in NYC is 29.94 inHg. Calculate this value in mmile and am 2. The atmospheric pressure of a cold winter day in NYC is 25.94 inHg. Calculate this value in Pa. 3. We set up an experiment utilizing the Dumas method to calculate the molar mass of an unknown chemical. A 4.00 mL pure liquid sample of this chemical is vaporized in an Erlenmeyer flask...
Most questions answered within 3 hours.
-
what statement accurately depicts the similarities in
requirements between payroll and human resources function
asked 44 minutes ago -
Calculate the volume integral of the function T=z^2 over the
tetrahedron with corners (0,0,0), (1,0,0), (0,1,0),...
asked 2 hours ago -
I propose to you a game. You roll 2 dice. If the sum of the
numbers...
asked 3 hours ago -
Select the most likely lattice types for each of the following
salts: (a) BeF2; (b) CaO;...
asked 3 hours ago -
a
ball is thrown downward with velocity of 10m/s. calculate the final
velocity if it reaches...
asked 4 hours ago -
How many grams of ice at -15°C must be added to 705 grams of
water that...
asked 5 hours ago -
2. Balance sheet
The balance sheet provides a snapshot of the financial condition
of a company....
asked 6 hours ago -
In week 1 of the chemical equilibrium experiment, you and your
lab team will create a...
asked 6 hours ago -
Identify and describe five (5) characteristics of a good KM
measurement system. Be sure to include...
asked 6 hours ago -
What are at least five (5) workplace wellness best practices for
a successful wellness program? Explain...
asked 6 hours ago -
A pharmaceutical company is testing a new drug. Of the 110
people that received the drug,...
asked 6 hours ago -
Which of the following is NOT a mechanism for gene
regulation?
a. Phase variation in DNA....
asked 7 hours ago