Most popular questions and responses by Alz
  1. Chemistry 11

    Carbon monoxide gas reacts with oxygen gas to form carbon dioxide gas acooridng to the following equation: 2CO(g)+O2(g)--> 2 CO2(g) IF 1 mole of CO2(g) is produves, how many kilojoules of heat energy are absorbed or released ?

    asked on September 12, 2010
  2. Chemistry HELP

    Complete combustion of 3.30 g of a hydrocarbon produced 10.2 g of CO2 and 4.68 g of H2O. What is the empirical formula for the hydrocarbon? I did the calculation and the ratio comes out to C: 1 H: 2.24 So I thought the answer is CH2 but apparently its

    asked on February 9, 2014
  3. US history

    The decision of the supreme court in the 1896 Plessy v. Ferguson case is important because it 1) upheld the legality of sharecropping 2) denounces the violence of the Ku Klux Klan 3) approved separate but equal facilities for black Americans 4) declared

    asked on May 17, 2011
  4. earth science

    Which of the following statements is FALSE about the magnitude of earthquakes? A. Magnitudes of earthquakes are based on powers of ten B. An earthquake of magnitude 3 on the scale is 1.5 times more intense than a magnitude 2 C. Great earthquakes can have a

    asked on November 12, 2018
  5. earth science

    How fast do the fastest tsunami waves travel in the deep ocean? A. About 40 miles per hour (mph) or (70 km/hour) B. About 100 mph (170 km/hour) C. About 400 mph (700 km/hour) D. About 1000 mph (1700 km/hour) E. About 4000 mph (7000 km/hour)

    asked on November 12, 2018
  6. Earth science

    If it is 75 degrees Fahrenheit at ground level, what is the temperature at 4000ft (under normal circumstances)? A. 32 degrees Fahrenheit B. 42 degrees Fahrenheit C. 45 degrees Fahrenheit D. 53 degrees Fahrenheit E. 58 degrees Fahrenheit

    asked on October 1, 2018
  7. earth science

    Which of the following is a statement about CLIMATE? A. Today, it is cloudy and raining. B. Rainfall amounts were about average this month. C. The winters here are cold and snowy. D. The temperature will rise during the next week. E. It is 56°F and sunny.

    asked on December 7, 2018
  8. earth science

    Surface waves disturb the water column to depths of A. less than 100 feet B. about 100 meters C. about 100 miles D. 1/2 of their wavelength E. their wavelength

    asked on November 12, 2018
  9. earth science

    Suppose you have 2 core samples. Sample 1 is from ice that is 2 meters deep and Sample 2 is from ice that is 100 meters deep. What is true about the CO2 levels in the 2 samples? A. The CO2 levels from the 2 samples would be the same. B. The CO2 level in

    asked on December 7, 2018
  10. earth science

    According to scientists, what is our best option if an asteroid 10 km in diameter was detected and closing in on an impact with Earth? A. Blow it up in space before it enters our atmosphere B. Divert it so that it doesn't collide with Earth C. Blow it up

    asked on December 7, 2018
  11. earth science

    Which of the items below is not a side effect of global climate change? A. Rising sea levels B. Desertification C. Shrinking permafrost D. Increased earthquake activity E. Shifts in plant and animal ranges and habitats

    asked on December 7, 2018
  12. earth science

    The deepest ocean trench is the Mariana trench. What is a contributing factor in it's depth? A. It is the site of an ancient meteorite collision. B. It is located near a divergent plate boundary. C. It is located near a convergent plate boundary. D. It is

    asked on October 24, 2018
  13. Algebra

    Which value of r represents data with a strong negative linear correlation between two variables? 1) -1.07 2) -0.89 3) -0.14 4) 0.92

    asked on May 15, 2011
  14. earth science

    The best reason that we know more about the K-T extinction event (the one that eliminated the dinosaurs) than other extinction events is because A. evidence for previous events is buried too far beneath the earth. B. dinosaurs are popular which leads to

    asked on December 7, 2018
  15. earth science

    Oceanic crust is created along which type of tectonic plate boundary? A. Subduction B. Transform C. Spreading D. Collision E. Cceanic crust is only formed from hot spots

    asked on October 24, 2018
  16. earth science

    Which item in the list below is most responsible for storm surge during a hurricane? A. Water mounding caused by a hurricane's low pressure center B. The strong horizontal surface winds in the hurricane push water ashore C. Heavy precipitation in the

    asked on October 1, 2018
  17. Chem

    The specific heat of water is 4.184 J/g degree C, and the specific heat of iron is 0.451 J/g degree C, which will reach a higher temperature when exposed to a given amount of heat?

    asked on October 2, 2012
  18. Calculus

    lim x -> pi/2 (sin(x/2)-cos(x/3)) Evaluate Please help

    asked on October 9, 2015
  19. earth science

    Which of the disasters below is least likely to be the cause of or the after effect of a landslide? A. Tornadoes B. Earthquakes C. Volcanic eruptions D. Fires E. Floods

    asked on October 24, 2018
  20. earth science

    How is the strength of the hurricane related to the sea surface temperature (SST)?

    asked on October 2, 2018
  21. Chemistry

    What are washers, nuts, and bolts made of? Aluminum, Zinc, Iron, or Nickel?

    asked on October 2, 2012
  22. Algebra

    Which relation is not a function? 1)(x-2)^2+y^2=4 2) x^2+4y+y=4 3) x+y=4 4) xy=4 So, I could eliminate some answers. My answer is either its 1 or 2. Can anyone help me?

    asked on May 14, 2011
  23. earth science

    Which of the items below is NOT a zone associated with tectonic activity? A. Subduction B. Spreading C. Collision D. Intersection E. Rift

    asked on October 24, 2018
  24. Chem

    Does Organic compound have weak or strong intermolecular forces?

    asked on May 9, 2011
  25. physics

    If the roller coaster track has a hill at the end that was equal in height to the original hill, would the marble make it all the way to the top? Please explain it to me! Thanks.

    asked on January 29, 2012
  1. US history

    I did read it. I am just confused between 1 and 4 because my teacher was talking about something regarding sharecropping related to Plessy v. Ferguson case today and i didn't get it.

    posted on May 17, 2011
  2. US history

    The answer is 1. right?

    posted on May 17, 2011
  3. Algebra

    Thank you! :D

    posted on May 15, 2011
  4. Algebra

    oops.. i meant: x^2+4x+y=4

    posted on May 14, 2011