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Archy [21]
3 years ago
15

Please Help!

Chemistry
2 answers:
iren2701 [21]3 years ago
4 0
2.c
idk if it is right
just trying to help
densk [106]3 years ago
4 0

1 is climate

I think 2 is c

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Answer:

the first one Calories

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True or false Nitrogen - 15 has 7 neutrons
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Yes Nitrogen has 7 Neutrons

Explanation:

3 0
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The reaction A + 2B + C -- >D + 2E is first order in reactant A, first order in B, and second order in C. What is the rate la
kvasek [131]
The answer should be D.  A rate law needs to be rate equaling the rate constant which is represented as k (make sure you use a lower case k since an upper case K is for equilibrium) times the concentrations of each reactant raised to the power of what ever order it has. (if A was a zero order it would be [A]⁰ and if A was third order it would be [A]³).
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I hope this helps. Let me know if anything is unclear in the comments.
7 0
3 years ago
Read 2 more answers
A student dissolves 0.0688 mol of sodium hydroxide in water to make a 0.250 L solution. What is the molarity of the solution?
den301095 [7]
Number of moles = 0.0688 moles of NaoH

volume = 0.250 L

Molarity = moles of solute / volume ( L )

M = 0.0688 / 0.250

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Answer B
7 0
3 years ago
Zn + I2 ---&gt; Znl2<br> Determine the theoretical yield of the product if 2g of Zn is used
egoroff_w [7]

Answer:

Mass = 9.58 g

Explanation:

Given data:

Mass of Zn = 2g

Theoretical yield of ZnI₂ = ?

Solution:

Chemical equation:

Zn + I₂       →     ZnI₂

Number of moles of Zn:

Number of moles = mass/molar mass

Number of moles = 2g / 65.38 g/mol

Number of moles = 0.03 mol

Now we will compare the moles of Zn and ZnI₂.

                   Zn           :          ZnI₂

                    1             :           1

                  0.03        :         0.03

Mass of ZnI₂:

Mass = number of moles × molar mass

Mass = 0.03 mol × 319.22 g/mol

Mass = 9.58 g

4 0
3 years ago
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