On a hot day (or during a stressful exam!), your body produces liquid swea which then evaporates according to the equation: H2O(I) → H2O(g) AH = +44 kJ/mol Is this process a chemical or a physical change? Is this process endothermic or exothermic? Why? O Endothermic; liquid-liquid IMFS are more stable than gas-gas IMFS. O Exothermic; liquid-liquid IMFS are more stable than gas-gas IMFS. O Endothermic; gases can be arranged in more ways than liquids. O Exothermic; gases can be arranged in more ways than liquids.

Chemistry Compute 1240.64/12.5. Round the answer appropriately. Express your answer numerically using the proper number of significant figures.

For the drop down menu on number 2, the options are zero, first, and second.

A student determined that the mass of four pennies was 8.7 grams. Use this information to calculate the number of pennies in a box that contains 2.5 pounds of pennies. Rouund your answer to the nearest whole number. For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).

Q Search for 20 minutes. Then return, put it down, and weigh yourself immediately three times. Since reporting your weight is a little too personal, I want you to tell me the variation between each reading (called a first derivative measurement). You should see the first weight is somewhat higher than the rest; often as much as 2-3 pounds. What do you th this tells you about your scale's quality? All other data is provided in the lab procedure Questions So, go ahead and answer them, then. a For measuring the block, (part 1) measure something and tell me what it is. Today, definitions. Here are your lab questions: 1. Define significant figure 2. Define accuracy 3. Define precision 4. How many significant figures are present in the measurement 0.053402 mm? How many are in 0.053400? Calculate the following: For three replicate (repeated) measurements, your values are as follows: 3.510 g; 3.565 g; 3.593 Answer the following questions: a. What is the average? b. the percentage error (the…

Answer question number 7 on the attached document

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Submitting an external tool Available after May 9 at 11:59pm back I Review I Constants I P Part D [OH-] = 7.9 x 10-3 M Express your answer using two decimal places. pH: %3D Submit Request Answer MacBook Air

Express the following points given in Cartesian coordinates in terms of spherical coordinates. (x, y, z): (1, 0, 0); (0, 1, 0); (0,0,1); (0,0,-1)

2 of 21-Homework X com/sac/6920146#/6920146/11/-1 Williston Forge Jero.... Translate P = OO X + HUAWEI P30* LEICA TRIPLE CAMERA T Synonyms and Ant... a Home Page - myAl... hp Resources e S SOAP2DAY Essayaibot: Free Ess... Hint A sample of an ideal gas has a volume of 2230 mL at 6.97 °C and 863 torr. Calculate the pressure when the volume is 1355 and the temperature is 30.59 °C. Paraphrasing Tool 2 Check Answer 0 C