Chemistry Help! (Again)

[T_Yamamoto]

Here I go again,
Chem help please, thanks
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Part 1
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29) In his experiments Lavoisier showed that mass is not changed in chemical reactions. Which one of the following postulates of Dalton's Atomic Theory is supported by his discovery?

Options:
a)All atoms of the same element have the same mass.
b)Atoms combine in simple whole number ratios.
c)Atoms cannot be broken down into smaller particles.
d)Atoms are only rearranged in chemical reactions, not created or destroyed.
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36) In his experiments Proust showed that the elements of a given substance are always found in the same proportion by mass. Which one of the following postulates of Dalton's Atomic Theory is supported by his discovery?

Options:
a)Atoms cannot be broken down into smaller particles.
b)Atoms are only rearranged in chemical reactions, not created or destroyed.
c)All atoms of the same element have the same mass
d)Atoms combine in simple whole number ratios.
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37p1) DONE
37p2) DONE
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49)Four different samples of substances made up of only Ni and Br were analysed to find the relative masses of each element. Which of following results indicates a different compound from the others?

Options:
a)20 g Br and 5.0 g Ni
b)16 g Br and 6.0 g Ni
c)12 g Br and 3.0 g Ni
d)28 g Br and 7.0 g Ni
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Part 2
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8) What is the specific heat of a substance if 16.0 kJ are required to raise the temperature of 405 g of the substance from 88.0°C to 173.0°C?

[Answer]J/g·°C
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What is the heat required to vaporize 55.1 g of liquid ammonia, NH3, at its boiling point? The ΔH° of vaporization of ammonia is 23.4 kJ/mol. Use a molar mass with at least as many significant figures as the data given.

[Answer]kJ
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13) Calculate the number of liters of 4.20 mol of hydrogen gas at STP.

[Answer]L
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22p1) For the following combination of reactants, enter the formulae of the products in the space provided and give their states. Separate multiple products with a comma ",". (Type your answer using the format 2Na2SO4(aq) for 2 Na2SO4(aq). If there are no products, enter "none".)

BaO(s) + H2O(l)

[Answer]

22p2)What type of reaction is this?

Options:
a)Combustion
b)Decomposition
c)Single Replacement
d)Double Replacement
e)Synthesis
f)No Reaction
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24) For the following combination of reactants, enter the formulae of the products in the space provided and give their states. (Separate multiple products with a comma ",". Type your answer using the format Na2SO4(aq) for Na2SO4(aq). Do not balance the equation. If there are no products, enter "none".)

Fe2(SO4)3(aq) + CaCl2(aq)

[Answer]

Options:
a)Combustion
b)Decomposition
c)Single Replacement
d)Double Replacement
e)Synthesis
f)No Reaction
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25) For the following combination of reactants, enter the formulae of the products in the space provided and give their states. (Separate multiple products with a comma ",". Type your answer using the format Na2SO4(aq) for Na2SO4(aq). Do not balance the equation. If there are no products, enter "none".)

ZnCO3(s) + heat

[Answer]

Options:
a)Combustion
b)Decomposition
c)Single Replacement
d)Double Replacement
e)Synthesis
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26) For the following combination of reactants, enter the formulae of the products in the space provided and give their states. (Separate multiple products with a comma ",". Type your answer using the format Na2SO4(aq) for Na2SO4(aq). If there are no products, enter "none".)

Cu(s) + Fe(NO3)3(aq)

[Answer]

Options:
a)Combustion
b)Decomposition
c)Single Replacement
d)Double Replacement
e)Synthesis
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27) For the following combination of reactants, enter the formulae of the products in the space provided and give their states. (Separate multiple products with a comma ",". Type your answer using the format Na2SO4(aq) for Na2SO4(aq). Do not balance the equation. If there are no products, enter "none".)

NaI(aq) + Cl2(g)

[Answer]

Options:
a)Combustion
b)Decomposition
c)Single Replacement
d)Double Replacement
e)Synthesis
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28) Fe2O3(s) + CO(g)

Fe(l) + CO2(g)
How many grams of Fe2O3(s) will be required to produce 5.80 moles of Fe(l)? Hint: Be sure to balance the equation first!

[Answer]g
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29)2 NaClO3

2 NaCl + 3 O2
Determine the number of moles of O2 produced by the decomposition of 426 g of NaClO3.

[Answer]mol
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30)CH4 + 2 O2

CO2 + 2 H2O
How many grams of CO2 are formed from the combustion of 2.50 moles of methane, CH4, in oxygen?

[Answer]g
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31) What volume of oxygen, O2, would contain 9.00 moles of gas at STP?

[Answer]L
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[HamburgerBoy]

37p1)Different isotopes of the same element have different numbers of what? (Select all that apply.)

Options:
a)Protons
b)Electrons
c)Neutrons
d)Alpha Particles

37p2)Different isotopes of the same element have the same number of what? (Select all that apply.)

Options:
a)Protons
b)Electrons
c)Neutrons
d)Alpha Particles

r u kidding

 

[PhoKingGuy]

I haven't done chemistry since my MCAT and this is all still easy for me. You fail at life, im not doing your homework for you.

 

[T_Yamamoto]

r u kidding

i forgot

 

[HamburgerBoy]

i forgot

Didn't you parents or grandparents give you $$$$ for good grades last year or something? You bring shame to your family.

 

[Mr. Pedantic]

i forgot

What, you forgot how to use Google?

You fail even more than I originally thought

 

[T_Yamamoto]

Didn't you parents or grandparents give you $$$$ for good grades last year or something? You bring shame to your family.

:whiste:

 

[FleshLight]

You should change majors if you can't even do chemistry 101

 

[Baked]

 

[T_Yamamoto]

You should change majors if you can't even do chemistry 101

my major isnt chem.....

 

[HamburgerBoy]

my major isnt chem.....

What are you majoring in?

 

[T_Yamamoto]

What are you majoring in?

im in high school :/

 

[PhoKingGuy]

im in high school :/

Go to your neighborhood public library, chances are the teachers manual for all of your questions is there. That's what I did with my homework if I couldn't figure it out.

 

[T_Yamamoto]

Go to your neighborhood public library, chances are the teachers manual for all of your questions is there. That's what I did with my homework if I couldn't figure it out.

theyre web assigns aka online homework

 

[PhoKingGuy]

theyre web assigns aka online homework

We had those in college, if you can't figure out how to bypass it and get the answers then I don't know what to tell you.

Just do it, its not that hard.