4-2 Activity Turning Questions Into Hypothesis

Question 11 please

FINAL Experiment 1- January 2021_-789644623 - Saved Layout Review View Table A friend of yours went panning for gold last weekend and found a nugget that appears to be gold. With your newfound scientific prowess, you set out to determine if it is really gold. Your tests show that the nugget has a mass of 7.6 g. Immersing the nugget in water raised the volume from 7.22 mL to 8.06 mL. The density of gold is 19.32 g/cm3. What will you tell your friend? acer

Question 20 of 26 > While driving your rental car on your vacation in Europe, you find that you are getting 13.4 km/L of gasoline. What does this value correspond to in miles per gallon? 13.4 km/L = mi gal about us privacy policy terms of use contact us help careers DD F12 F11

QUESTION 17 Which of the following is most likely an example of a basic research project? O Potential development of a completely new family of chemicals in 10 to 15 years. O The development of better packaging of batteries for electric cars. O Modification of an existing chemical reaction process to make the same chemical in a less expensive fashion. O Finding a technically more efficient method to produce the same product. QUESTION 18 The original 'Back to the Future' movie showed a box of 'plutonium' marked with a radioactive symbol in under Doc Brown's bed. He used this fissionable material to create the 1.21 gigawatts needed to make his car travel through time. The energy that the car ran on was generated by O An element undergoing a chemical change O A compound undergoing a chemical change A compound undergoing a nuclear change O An element undergoing a nuclear change

What safety rules did Andrew break?

Please report your answer in scientific notation in the provided boxes. Che Although it is not usually used, Einstein's equation, E=mc2 applies to chemical reactions as well as nuclear reactions. A combustion reaction released 95.0 kJ when one gram of a reactant was burned. How much of this mass was lost in the process? Report your answer to 3 significant figures. 1 joule = 1 kilogram-meter/second² x10 -10 3

A Honda Accord gets 24 miles per gallon in the city and is estimated to emit 7 tons of CO2 per year. How many trees would it take to absorb the Accord's emissions? Hint: 1 ton equals 2000 pounds and single tree can absorb 30 pounds of CO2 per year.

Goofy Incorporated bought a sizeable amount of Crazy Company's bonds for $200,000 on May 5, 2023, and classified the investment as available-for-sale. The market value of the bonds declined to $124,000 by December 31, 2023. Goofy reclassified this investment as trading securities in December of 2024 when the market value had risen to $163,000. What effect on 2024 net income should be reported by Goofy for the Crazy Company bonds? A: 39,000 net unrealized holding gain B: 37,000 net unrealized holding loss C: 76,000 net unrealized holding loss D: 0