1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
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>
You might be interested in
What is the pH of a 0.050 M triethylamine, (C2H5)3N, solution? Kb for triethylamine is 5.3 ´ 10-4. Question options: 1) 11.69 2)
blsea [12.9K]
<span>the pH of a 0.050 M triethylamine, is 11.70
</span>
For triehtylamine, (C_{2}H_{5})_{3}N, the reaction will be
(C_{2}H_{5})_{3}N + H_{2}O ---\ \textgreater \ ( C_{2}H_{5})_{3}NH^{+} + OH^{-}

 and we know, pH = -log[H+] and pOH = -log[OH-]

Also, pOH + pH = 14

Now, the Kb value  = 5.3 x 10^-4

And kb =  \frac{( [( C_{2}H_{5})_{3}NH^{+} ]*  OH^{-} )}{[( C_{2}H_{5})_{3}N]}

 thus, [OH-] =(5.3 ^ 10-4) ^2 / 0.050

                    =0.00516 M 

Thus, pOH = 2.30 
 pH = 14 - pOH = 11.7
6 0
3 years ago
Temperature has no effect on matter.<br><br> A <br> True<br><br> B <br> False
andrey2020 [161]

true because matter is a space not a space

5 0
3 years ago
You can purchase nitric acid in a concentrated form that is 70.3% HNO3 by mass and has a density of 1.41 g/mL. Describe exactly
Andrej [43]
The way to working out the numbers is to increase the measure of HNO3 required by the molarity to discover what number of moles you require: 0.115. You ought to have the capacity to make sense of the recipe weight H is 1, N is 14, O is 16. The result of the quantity of moles duplicated by the recipe weight ought to give an esteem in grams. You can utilize the thickness to change over to a volume of HNO3 to add to the right volume of water.
6 0
3 years ago
Read 2 more answers
Multiple choice-- 16 pts!
Naddika [18.5K]

Answer: It decreases because nonvolatile aluminum and chloride ions now occupy some of the volume of the system.

Explanation:

Vapor pressure of a liquid  is defined as the pressure exerted by the vapors  in equilibrium with the liquid/solution at a particular temperature.

So, when a non-volatile solute is added to a solvent then its molecules align at the surface of liquid. As a result, less number of solvent molecules will escape from the solution. Thus, there will be decrease in vapors and thus the vapor pressure decrease.

The relative lowering of vapor pressure is directly proportional to the amount of dissolved solute.

6 0
2 years ago
Compare a mixture and a compound. How are they alike?
harina [27]

Answer:

1.Difference.

Mixtures are physically combined and can be separated by physical means while compounds are chemically combined and are separated by chemical means.

2.Mixtures do not have mixed boiling and melting points while compounds have mixed boiling and melting points.

2.Similarity.

Both mixtures and compounds are composed of two or more substances or elements combined.

Both can be separated.

7 0
3 years ago
Other questions:
  • Recording station x has determined that the epicenter of a recent earthquake was 250 km away. no information is available yet fr
    13·2 answers
  • According to the Pauli exclusion principle, when can two electrons occupy the same orbital?
    9·1 answer
  • The following is known as the thermite reaction: 2Al(s)+Fe2O3(s)→Al2O3(s)+2Fe(s) This highly exothermic reaction is used for wel
    11·1 answer
  • Common element in all the organic compound another than hydrogen is ​
    13·1 answer
  • What is Aqua Auras mineral family/class?
    5·1 answer
  • What energy convertion happens when green plants use energy from the sun to make sugar?
    10·2 answers
  • If a sample containing 2.50 ml of nitroglycerin (density=1.592g/ml) is detonated, how many total moles of gas are produced?
    13·1 answer
  • How many atoms are in 3.50 moles of calcium (ca)?
    13·1 answer
  • Hi, pls can someone answer<br> I'll give brainliest
    5·2 answers
  • What are phrases that you need to include in your TCT that show that you are citing evidence? Failure to use these phrases will
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!