Science

1) Which of the following is a chemical change? (1 point)
Boiling of water
Melting a cube of ice
Dissolving 10 grams of salt in water
Splitting water into hydrogen and oxygen***

2) What is the mass of water that results from combining 2.0g of hydrogen with 16.0g of oxygen? (1 point)
14.0g
16.0g
18.0g***
20.0g

3) Why are plastic building blocks good for modeling molecules? (1 point)
They come in thousands of shapes and sizes.
They can be combined in many different ways.***
They are rigid and do not easily separate.
There are as many different colors as there are atoms.

4. What did Antoine Lavoisier’s experiments demonstrate? (1 point)
Atoms always split into pairs during a chemical change.
Mass is neither lost nor gained during a chemical change.***
Matter can be created during a chemical change.
Energy is neither lost nor gained during a chemical change.

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  3. 👁 13,803
  1. Please help :(

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  2. I agree with your answers.

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    2. 👎 1
  3. what about #4?

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    2. 👎 2
  4. Yes, Skylar, even question 4.

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  5. ok good cause I kind of geussed

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  6. Yay! I got 100% thanks for checking with me herp_derp :D

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    2. 👎 1
  7. You should not guess all the time. Even a quick google search can verify your answer.

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  8. I only guessed on number 4 the rest I did on my own

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  9. They are all correct :)

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  10. wow i got 100% to thx guys

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  11. THANKYOU I was rely having trouble with number 3

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  12. D
    C
    B
    B

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  13. Pacman is 100% correct! Thank you!!

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  14. Yes 100% Correct

    1. D
    2. C
    3. B
    4. B

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  15. d
    c
    b
    b is correct got 100%

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  16. THX
    100%

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  17. nbvmbv

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  18. I got 100/100 :) Thanks pacman

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  19. 1. D
    2. C
    3. B
    4. B

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  20. 100%

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  21. Connexus students is 100%
    1.D
    2.C
    3.B
    4.B

    Idk about khan academy

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  22. I totally needed help thank you soooo much That girl doesn't wanna work cause she's behind xo and Pacman and Herp_Derp. BTW, I love Pacman!!! Thank you!!!!

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  23. Connexus Student 100%
    Thankyou everybody

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  24. Thx I love this

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  25. SMH, this puts a bad name on all 6th graders....

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  26. Thanks a bunch, really helped!

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  27. Got 100% THANKS

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  28. Thanks ^^

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  29. :D
    Thanks~~

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  30. THX GUYS I GIT A 100% AND BOOSTED MY GRQDE UP FIR A C TO A. TYSM

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  31. 1.D
    2.C
    3.B
    4.B

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  32. why do people copy Skylar's answers no offence.

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  33. thanks

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  34. :)

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  35. Thanx pacman and everyone else! 100%

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  36. 1. D
    2. C
    3. B
    4. B

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  37. That was not my questions

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  38. 100%

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  39. thank you

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  40. still work DCBB 2020 100%

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  41. Got 100%

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  42. Yes! Thank you! I got all of my questions right! Thank you so much for these answers:
    1.D
    2.C
    3.B
    4.B

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