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Svetach [21]
3 years ago
13

Which chemical is oxidized? A) Mg B) O2 C) MgO

Chemistry
1 answer:
kow [346]3 years ago
5 0

C) MgO aka magnesium oxide

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For the reaction CO+2H2=CH3OH at 700 K, equilibrium concentrations are [H2]=0.072 M, [CO]= 0.020M, and [CH3OH]= 0.030 M. Calcula
bekas [8.4K]

The balanced equation for the reaction is

CO(g) + 2H₂(g) ⇄ CH₃OH(g)

 

The given concentrations are at equilibrium state. Hence we can use them directly in calculation with the expression for the equilibrium constant, k. expression for k can be written as

   k = [CH₃OH(g)] / [CO(g)] [H₂<span>(g) ]²

</span>[H₂<span>]=0.072 M
[CO]= 0.020M
[CH</span>₃OH]= 0.030 M

 

From substitution,

   k = 0.030 M / 0.020 M x (0.072 M)²

   k = 289.35 M⁻²

<span>
Hence, equilibrium constant for the given reaction at 700 K is 289.35 M</span>⁻².

<span> </span>

3 0
3 years ago
How many lone pairs are on the central atom of BrF3?
allochka39001 [22]

Answer:

BrF3 has 2 lone pairs (4 unshared electrons)

Explanation:

8 0
3 years ago
What was the first true element to be found?
umka2103 [35]

Answer:

Phosphorous.

Explanation:

In 1649 Hennig Brand discovered phosphorous.

5 0
3 years ago
In which of the following reactions is ΔS positive?
ira [324]
Answer: letter b. 

Why?
 Because Entropy(ΔS) INCREASES when INCREASING disorder in a reaction.

A. INCORRECT. Negative ΔS. This is because there are less molecules of gas in the products compared to the reactants.
B. CORRECT. Positive ΔS. This is because you are increasing disorder by breaking down a solid(highly ordered) molecule into two ions in solution(in solution they are less ordered).
C. INCORRECT. Negative ΔS. This is because you are going from a (g)gas which has more disorder to a (s)solid which has much less disorder than a gas.
D. INCORRECT. Negative ΔS. This is because you are decreasing disorder by building a single molecule. There are also more moles of gas on the reactants side indicating a negative ΔS.

Please comment with any further questions. Hope this helped!
5 0
3 years ago
Please help with this giving brainlist !!
mash [69]

Answer:

if im right i do my caculation that it is B

6 0
3 years ago
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