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4 years ago

Use the information in the table to describe the temperature-vs.-time diagrams.

Chemistry

2 answers:

Paha777 [63]4 years ago

3 1

I think answer should be the last option I hope this helps let me know if it’s correct thanks

butalik [34]4 years ago

3 0

Answer:

At 30 and 2,204

diagonal

liquid phase

2856

top horizontal line

flat

the change from a solid to a liquid

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Hydrogen sulfide decomposes according to the following reaction, for which Kc = 9.30 10-8 at 700°C. 2 H2S(g) 2 H2(g) + S2(g) If

Vikentia [17]

Answer:

The equilibrium concentration of hydrogen gas is 0.0010 M.

Explanation:

The equilibrium constant of the reaction = $K_c=9.30\times 10^{-8$ }

Moles of hydrogen sulfide = 0.31 mol

Volume of the container = 4.1 L

$[concentration]=\frac{moles}{volume (L)}$

$[H_2S]=\frac{0.31 mol}{4.1 L}=0.076 M$

$2H_2S(g)\rightleftharpoons 2H_2(g)+S_2(g)$

Initially

0.076 M

At equilibrium

(0.076-2x) 2x x

The expression of an equilibrium constant :

$K_c=\frac{[H_2]^2[S_2]}{[H_2S]^2}$

$9.30\times 10^{-8}=\frac{(2x)^2\times x}{(0.076-x)^2}$

Solving for x:

x = 0.00051

The equilibrium concentration of hydrogen gas:

$[H_2]=2x=2\times 0.00051 M=0.0010 M$

4 0

4 years ago

Explain how scientific knowledge and reasoning can help us make difficult decisions.

ch4aika [34]

<span> Scientific reasoning consists of observation, forming a workable hypothesis and arriving at a conclusion. Almost without exception major scientific discoveries were made and are being made today based on these same precepts. It only seems logical when an individual makes a difficult decision he/she will apply all or part of these processes. Let;s say that you want to make someone;s acquaintance to possibly become serious. Certainly, you would begin by quietly observing them, then you might make a hypothesis, "This person might make a good companion for me." Then in your conclusion you would test your hypothesis and proceed as directed. THis may be a bit simplistic, and I hope that it helps.</span>

3 0

3 years ago

Since vinegar is 5% acetic acid and 95% water, find the mole ratio of acetic acid to water in 100 g of vinegar? Hint: Instead of

Oksanka [162]

The mole ratio of acetic acid to water in 100 g of vinegar is 0.015 : 0.985.

<h3>What is the mole ratio of acetic acid to water in 100 g of vinegar?</h3>

The mole ratio of acetic acid to water in 100 g of vinegar is determined from their percentage composition.

The percentage composition of acetic acid and water in vinegar is 5% acetic acid and 95% water.

In 100 g of vinegar, there are 5 g of acetic acid and 5 g of water.

Moles = mass/molar mass

molar mass of acetic acid = 62 g/mol

molar mass of water = 18 g/mol

moles of vinegar = 5/62 = 0.08

moles of water = 95/18 = 5.28

total moles = 5.36

Mole ratio of vinegar to water = 0.08/5.36 : 5.28/5.36

Mole ratio of vinegar to water = 0.015 : 0.985

In conclusion, the mole ratio is determined from the percentage composition of acetic acid and water in vinegar.

Learn more about mole ratio at: brainly.com/question/19099163

#SPJ1

7 0

2 years ago

Two beakers are placed in a small closed container at 25 °C. One contains 284 mL of a 0.296 M aqueous solution of C6H12O6; the s

Katen [24]

Answer:

Final volume = 0.103M x446ml/0.184m = 250ml

Explanation:

As time passes, the volume of solutions in the second beaker decreases and that in the first beaker increases. If we wait long enough, the final volumes and concentration in the beakers would be,

First beaker

Final concentration = 0.184M

Final volume = 0.296M x 284ml/0.184 = 457ml

Second beaker

Final concentration = 0.184M

Final volume = 0.103M x446ml/0.184m = 250ml

6 0

3 years ago

Read 2 more answers

Identify the products in: CH4 + 2O2 2H2O + CO2

tatuchka [14]

<span>CH4 + 2O2-----> 2H2O + CO2
reactants products

Reactants are CH4, O2
Products H2O, CO2</span>

5 0

4 years ago