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Sergio039 [100]
4 years ago
15

Estimate ΔG°rxn for the following reaction at 449.0 K. CH2O(g) + 2 H2(g) → CH4(g) + H2O(g) ΔH°= -94.9 kJ; ΔS°= -224.2 J/K

Chemistry
1 answer:
Sliva [168]4 years ago
7 0
This equation relates all three variables, so just plug in all of the given values. Don’t forget to convert deltaS into kJ/K because Gibbs free energy is measured in kJ. The K used in temperature cancels out the K in kJ/K, leaving only kJ as your units. Don’t forget sig figs!

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Problem PageQuestion A chemistry student weighs out of acetic acid into a volumetric flask and dilutes to the mark with distille
zalisa [80]

Answer:

7.92 mL

Explanation:

There is some info missing. I think this is the original question.

<em>A chemistry student weighs out 0.0617g of acetic acid (HCH₃CO₂) into a 250.mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1300 M NaOH solution. </em>

<em> Calculate the volume of solution the student will need to add to reach the equivalence point. Round your answer to 3 significant digits.</em>

<em />

First, we will calculate the moles of acetic acid (MW 60.05 g/mol).

0.0617 g × (1 mol/60.05 g) = 1.03 × 10⁻³ mol

Let's consider the neutralization reaction between HCH₃CO₂ and NaOH.

HCH₃CO₂ + NaOH ⇄ NaCH₃CO₂ + H₂O

The molar ratio of HCH₃CO₂ to NaOH is 1:1. The moles of NaOH are 1.03 × 10⁻³ moles.

The volume of 0.1300 M NaOH that contains 1.03 × 10⁻³ mol is:

1.03 × 10⁻³ mol × 1000 mL/0.1300 mol = 7.92 mL

3 0
3 years ago
Which of the following minerals is a ferromagnesian silicate?
lutik1710 [3]

Answer: Hornblende

Explanation: Even more permissive than pyroxene, amphibole has compositions that can be extremely intricate. For instance, the elements sodium, potassium, calcium, magnesium, iron, aluminum, silicon, oxygen, etc. can be found in hornblende.

3 0
1 year ago
The following data was collected when a reaction was performed experimentally in the laboratory.
Reptile [31]

The maximum amount of AlCl_3 produced during the experiment can be find out by knowing the Limiting Reagent.

Here, The maximum amount of AlCl_3 produced during the experiment is  400 grams

<h3>What is Limiting reagent ?</h3>

The limiting reagent (or limiting reactant or limiting agent) in a chemical reaction is a reactant that is totally consumed when the chemical reaction is stopped.

Now, According to the question,

Given ;

Number of moles of Al(NO_3)_3 - 4 moles

Number of moles of NaCl - 9 moles

To Find - Maximum amount of AlCl_3 produced during the reaction.

Solution ;

complete reaction ;

Al(NO_3)_3  + 3NaCl -->   3NaNO_3 + AlCl_3

To find the maximum amount of AlCl_3 produced during the reaction,

we need to find the limiting reagent.

Mole ratio Al(NO_3)_3  = 4/1 = 4

Mole ratio NaCl = 9/3 = 3

Thus, NaCl is the limiting reagent in the reaction.

Now, 3 moles of NaCl produces 1 mole of   Al(NO_3)_3

9 moles of NaCl will produce = 1/3 x 9 = 3 moles.

Weight of   Al(NO_3)_3 = 3 x 133.34 = 400 grams

Thus, 400 grams of   Al(NO_3)_3  is the maximum amount of   Al(NO_3)_3 produced during the experiment.

Learn more about Limiting Reagent Here ;

brainly.com/question/20070272

#SPJ1

8 0
2 years ago
What are the states of matter in precipitation?<br> Thank you! Have a nice day!
Klio2033 [76]

There can be two, solid (Hail) and liquid (Water).

5 0
3 years ago
Read 2 more answers
Plz help me ppl I don't understand
labwork [276]

The chart is about atomic structure: at the top, the left box is "nucleus" and the right is "electron cloud".


On the left, under nucleus, the two boxes are: "protons" on the right and "neutrons" on the left.  Under proton is elements which is given and under neutrons, it is "isotopes".


On the right, under electron cloud, the next box is "electrons" and then the lower box is "ions".


7 0
3 years ago
Read 2 more answers
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