CHIAF4.2

esc V Calculate the amount of heat needed to melt 152. g of solid methanol (CH3OH) and bring it to a temperature of -23.9 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. 0 Explanation Check → x10 X с L Ś G Search or type URL % MacBook Pro A C ✰ 2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility ‹ 6 ol. Ar

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In lab, you determine that the mass of a Florence flask and a piece of aluminum foil weigh 39.821 g. After performing the experiment on an unknown, you find that the flask, foil, and condensed vapors weigh 40.329 g. The flask was removed at 90.6oC when all the liquid was vaporized. At the end of the experiment you place the Florence flask and foil on the balance, fill the flask with water at 20.2∘ C, and find a mass of 163.823 g. If the current barometric pressure is 774 torr, what is the molar mass of your unknown?

O Advanced Material Using heat of fusion or vaporization to find the heat needed to melt or bo... esc Calculate the amount of heat needed to melt 142. g of solid hexane (C6H14) and bring it to a temperature of 44.8 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. 0 ! 1 0² Explanation. F1 @ https://azinsight.adsrvr.org/track/clk?imp=fbec12b0-7f3d-4127-929d-a59782e61fbb&ag=r735012&sfe=1788cd47&sig=PCK7iCABpePPZol9wV E9gKn0P16FOT7R3rMUmfWw.&crid=2zvfx50b&cf=5773664&q=0&t=2&tds-www.chegg.com&rca 2 * Check F2 #3 0.0 80 F3 X $ 4 ds Ś F4 do 5 % f F5 6 F6 & 7 F7 * 8 DII FS ( 9 FO 0 F10 0/5 - C Danasia V F11 园长园 + = 112

In lab, you determine that the mass of a Florence flask and a piece of aluminum foil weigh 39.862 g. After performing the experiment on an unknown, you find that the flask, foil, and condensed vapors weigh 40.572 g. The flask was removed at 98.3oC when all the liquid was vaporized. At the end of the experiment you place the Florence flask and foil on the balance, fill the flask with water at 20.2∘ C, and find a mass of 165.033 g. If the current barometric pressure is 756 torr, what is the molar mass of your unknown? Report your answer to one place after the decimal.

What materials will the teacher and the students need to complete a lesson on mixing substances in a 5th grade classroom based on the below standard and learning objective? Standard Conduct an investigation to determine whether the mixing of two or more  substances results in new substances.  Learning Objective Given a variety of substances and safety equipment in a classroom setting, students will be able to conduct an experiment to mix two or more substances and observe the results. They will be able to correctly identify whether a new substance has been formed as a result of the mixing, based on observable changes such as color change, formation of a precipitate, or change in temperature, with at least 80% accuracy.

Answer the following pre

[please answer with correct answer] Temperature is a measure of ____

8. Students place an Erlenmeyer flask filled with water on a hot plate as seen in the illustration below. Thermometer Which of the following accurately describes the transfer of heat in this scenario and also indicates the impact on molecular motion? (Select 2) A. Heat from the sun reaches the pot via radiation causing the water molecules to move faster. B. The glass and water are heated by conduction which causes the glass molecules to vibrate. C. The glass and water are heated by convection which causes the water molecules to move faster. D. The glass is heated by conduction which causes the molecules of glass to vibrate. E. The water is heated by convection which causes the molecules of water to vibrate. F. The water is heated by convection which causes the molecules of water to move faster. O Ei 20 711

TRUE OR FALSE 6-10 ONLY

Calculate the amount of heat needed to melt 46.9 g of solid benzene (C,H.) and bring it to a temperature of 21.0 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol.

Calculate the heat (q) transferred from the water to the ice by q = mCΔT where the heat capacity (C) for water is 4.18 J/g°C and the mass is for the water in the calorimeter.  (For trial one and two only)

number 12 please

Posttest Direction. Read the questions carefully. Write the letter of the correct answer. 1. Water exists in three states of matter and continuously moving through a cycle on Earth. At which stage in the water cycle does water transform from a gas to a liquid? a.evaporation c. precipitation b. condensation d. Sublimation 2. Carbon dioxide (CO2) forms when coal burns in the presence of oxygen. Which of the following is the BEST evidence that a chemical reaction occurs when the coal burns? a. Production of mechanical energy c. A new substance is produced b. Production of electricity d. Formation of precipitate 3.Which of these does NOT happen during a chemical change? a. New substances are formed with different chemical properties. b. Attractive force between atoms of molecule formed or break. c. The chemical properties of the substances before and after the reaction are the same d. Energy is always released or absorbed. 4. A granular substance is added to a liquid. Which of the…

X Particulate Electrical Forces Unit Test - Profile 1- Microsoft Edge O https://www.connexus.com/assessments/learnosity.aspx?idAssessment=D1867963&idWebuser=3723941&idSection=1554684&idHtmllet3D12228907&c Particulate Electrical Forces Unit Test Particulate Electrical Forces Unit Test A team of students is collecting measurements of the boiling point of a liquid. The team determines a result of 37.0 + 0.5°C. Through research, the team finds that the accepted value of the boiling point of the liquid is 37.4°C. Which conclusion can the team draw from this result? O The exper have uncovered a more accurate value of the boiling point. uld be continued until the team comes up with the exact result. ne data was collected inaccurately. Ite ears the data was collected accurately. Ite Iter Item Type here to search 47°F Mostly c 直 0 prt scr %23 %24 backepae 8.

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Pre-Lab 1. For the following questions, respond using one of the four options: A. Higher B. Lower C. Same D. Faster E. Slower a. The specific heat of water is higher than the specific heat of iron and the temperature of 100 g of water will rise heat applied. than that for a 100 g of iron, for the same amount of b. When two bodies at different temperatures are in contact with each other, heat will flow from one body to the other until they are both at the temperature. 2. For each of the following situations, determine if an endothermic or exothermic reaction/process is taking place. a. Upon dissolving NH4C1 in water the beaker is cold to the touch. b. Upon dissolving CaCl2 in water the beaker is hot to the touch. Nuclear fission: nº + 235U 141Ba + 92Kr + 3 nº + energy с. d. Photosynthesis: 6 CO2 + 6 H2O+ energy CH12O6 + 6 O2 e. Melting ice

Could you help me with this calculation for temperature and phase change?

CaiyaEwing@gmail. M Kaiya.Ewing Gia A Göðgle Classi + 70% 2 of 11 2. Two students are setting up a demonstration to show different ways that heat can be transferred from a hot plate to a thermometer. They are provided with the following materials: Beakers, Thermometers, Water, Sand, and Hot Plates. The procedure is as follows. 1. Fill beaker #1 with water, and beaker #2 with sand. 2. Put a thermometer in the beaker with water and a thermometer in the beaker with sand. 3. Record the temperature of the sand and the water. What are the next steps and which description accurately represents the transfer of heat? A. Step 4: Place each beaker on a separate hot plate and tums on the hot plate. Step 5: Record the temperature every minute. Explanation: Beaker #1 demonstrates heat transfer by convection and beaker #2 demonstrates heat transfer by conduction. B. Step 4: Place each beaker on the lab bench Step 5: Record the temperature every hour. Explanation: Both beakers demonstrate heat…

An insulated container is half full of room temperature water. If the container is shaken vigorously for two minute, what happens to the temperature of the water? It decreases by a factor of 2   It decreases   It increases   It stays the same   It increases by a factor of 2

Energy Curve Worksheet Below is a diagram showing a typical heating/cooling curve for water. It reveals a wealth of information about the structure and changes occurring in water as it is heated or cooled through all three phases of matter at different temperatures. At the top of the diagram are pictures representing the typical particle arrangement as substances change through their states. 130 A B D E Gas 100 IGas - Liquid Liquid Liquid- ! Solid Solid Heat Added (Endothermic) Heat removed (Exothermic) Identify by letters (A-E) in which section the following are found: 1. Solid getting warmer 10. Particles are rigid & compressed Liquid getting warmer 11. Particles closest together 3. Gas getting warmer 12. All particles able to move past each 4. Freezing/ Solidifying other in fluid motion 5. Melting/ Liquefying 13. Condensation occurs 6. Boiling point 14. Strongest IMF Particle motion is stationary Particles are most chaotic and 7. Boiling (Vaporization) 15. 8. Particles farthest…

Part A) 70 ∘C Express your answer to four significant figures and include the appropriate units.  P=_____   Part B)   85 ∘C Express your answer to four significant figures and include the appropriate units.  P=_____

Activity 1.1 Description of Intermolecular Forces Match Column A with column B. Choose the letters of the correct answer and write it on your answer sheet. Column A Column B 1. Attractive forces between polar molecule 2. Electrostatic attraction between an ion a. hydration b. ion-induced dipole and a polar molecule 3. Favorable interaction between the ions of an ionic compound and water 4. Distortion of the electron distribution of an atom or molecule brought about by an ion or a polar molecule 5. Dispersion of charges when an ion approaches a molecule 6. Happens when a H-atom bonded to electronegative atoms, such as O, N, F approaches a nearby electronegative atom 7. Dispersion of charges when a dipole approaches a nonpolar molecule 8. The ease with which electron distribution j. dispersion forces is distorted 9. Substance with positive and negative ends 10. Positively-charged ions c. H-bonding d. polarizability e. dipole-dipole f. dipole-induced dipole g. ion-dipole h. dipole i.…

SylvanPrep edx edX| Free Online... C Coursera| Online... = College Algebra B.. an... - Calcworkshop Resources O Hint Check Answer 45.9% Assignment Score: Question 32 of 41 A new linear temperature scale, degrees Zunzol (°Z), is based on the freezing point and boiling point of a newly discovered compound zunzol. The freezing point of zunzol, -141.5 °C, is defined as 0 °Z, and the boiling point of zunzol, -24.8 °C, is defined as 100 °Z. What is the freezing point of water in degrees Zunzol? | freezing point: What is the boiling point of water in degrees Zunzol? boiling point: 1037 10 A stv P. 2.