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jeka94
3 years ago
5

19pts please help How many grams of CO are needed to react with an excess of Fe203 to produce 225.5 g Fe? Number after the symbo

ls are subscripts unless there is a ^ to show it is an exponent? Fe203(g) +CO(g)-->3CO2(g)+2Fe(s) Please explain if can
Chemistry
1 answer:
Travka [436]3 years ago
4 0
12.2 - Logarithms<span>Before reading this section you may want to review the section on </span>exponents<span>, since logarithms are based on them. </span>

<span>Introduction: </span><span>It is a fact that every positive number, </span>y<span>, can be written as 10 raised to some power, </span>x. We write this relationship in equation form, like this:<span>y = 10 x.</span>For example it is quite obvious that 1000 can be written as 10 3, because the exponent 3 means multiply 10 by itself 3 times and 10·10·10=1000. It may not be quite so obvious that 16 can be written as 10 1.2. What does it mean to multiply something by itself 1.2 times? And how can we calculate that this is the correct power of 10? The answer is in the graph shown below.

This is a graph of the equation  y = 10 x  that was mentioned above. To make this graph we made a table of a few obvious values of  y = 10 x<span>  as shown below, left. Then we plotted the values in the graph (they are the red dots) and drew a smooth curve through them. Then we observed that the curve went through </span>y<span> = 16 and </span>x<span> = 1.2 (the black dot). We take this to mean that 16 = 10</span> 1.2<span>. </span>
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if you see a dark mass similar to a blown-up balloon at the top of a volcano, what type of feature are you most likely viewing
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Conventional volcanoes are known to erupt after pressure builds up from new magma flowing into the magma chambers that lie below the vents on the Earth's surface.
6 0
3 years ago
What would be the composition and ph of an ideal buffer prepared from lactic acid (ch3chohco2h), where the hydrogen atom highlig
Mashutka [201]

Answer:

P_H =2.86

c=1.4\times 10^{-4}

Explanation:

first write the equilibrium equaion ,

C_3H_6O_3  ⇄ C_3H_5O_3^{-}  +H^{+}

assuming degree of dissociation \alpha =1/10;

and initial concentraion of C_3H_6O_3 =c;

At equlibrium ;

concentration of C_3H_6O_3 = c-c\alpha

[C_3H_5O_3^{-}  ]= c\alpha

[H^{+}] = c\alpha

K_a = \frac{c\alpha \times c\alpha}{c-c\alpha}

\alpha is very small so 1-\alpha can be neglected

and equation is;

K_a = {c\alpha \times \alpha}

[H^{+}] = c\alpha = \frac{K_a}{\alpha}

P_H =- log[H^{+} ]

P_H =-logK_a + log\alpha

K_a =1.38\times10^{-4}

\alpha = \frac{1}{10}

P_H= 3.86-1

P_H =2.86

composiion ;

c=\frac{1}{\alpha} \times [H^{+}]

[H^{+}] =antilog(-P_H)

[H^{+} ] =0.0014

c=0.0014\times \frac{1}{10}

c=1.4\times 10^{-4}

6 0
3 years ago
The rate law for the reaction 3a ⟶⟶ c is rate = 4. 36 x 10–2 l • mol–1 • h–1[ a ]2 how long will it take in hours for the concen
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The hours taken for concentration to decrease from 0 to 74 min. to 0.21 m is 91.7 hours.

<h3>What is the rate law of a reaction?</h3>

Rate law depicts the rate of a chemical reaction depend on the concentration of the reactant.

The given reaction is second order reaction

Thus, the hours taken for concentration to decrease from 0 to 74 min. to 0.21 m is 91.7 hours.

Learn more about rate law of a reaction

brainly.com/question/8314253

#SPJ4

4 0
2 years ago
Which of the following is an electrolyte?<br><br> a. PbCl2<br> b. MgS<br> c. HNO3<br> d. Al2(Cr2O7)3
Phoenix [80]

Answer: A: PbCl2

Hope dis helps!

8 0
3 years ago
If you throw a ball into the air, the force of ________ makes the ball fall back toward Earth.
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2 years ago
Read 2 more answers
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